/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:10:13,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:10:13,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:10:13,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 20:10:14,040 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 20:10:14,075 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:10:14,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:10:14,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:10:14,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:10:14,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:10:14,078 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:10:14,079 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:10:14,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:10:14,079 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:10:14,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:10:14,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:10:14,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:10:14,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:10:14,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:10:14,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:10:14,081 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:10:14,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:10:14,081 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:10:14,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:10:14,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:10:14,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:10:14,082 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:10:14,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:10:14,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:10:14,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:10:14,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:10:14,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:10:14,083 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:10:14,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:10:14,083 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:10:14,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:10:14,084 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:10:14,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:10:14,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:10:14,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:10:14,526 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:10:14,527 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:10:14,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl [2021-06-12 20:10:14,528 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-trans.wvr.bpl' [2021-06-12 20:10:14,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:10:14,578 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:10:14,579 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:10:14,579 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:10:14,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:10:14,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:10:14" (1/1) ... [2021-06-12 20:10:14,608 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:10:14" (1/1) ... [2021-06-12 20:10:14,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:10:14,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:10:14,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:10:14,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:10:14,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:10:14" (1/1) ... [2021-06-12 20:10:14,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:10:14" (1/1) ... [2021-06-12 20:10:14,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:10:14" (1/1) ... [2021-06-12 20:10:14,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:10:14" (1/1) ... [2021-06-12 20:10:14,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:10:14" (1/1) ... [2021-06-12 20:10:14,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:10:14" (1/1) ... [2021-06-12 20:10:14,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:10:14" (1/1) ... [2021-06-12 20:10:14,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:10:14,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:10:14,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:10:14,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:10:14,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:10:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:10:14,729 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:10:14,729 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:10:14,730 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:10:14,730 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:10:14,730 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:10:14,730 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:10:14,731 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:10:14,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:10:14,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:10:14,731 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 20:10:14,731 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 20:10:14,733 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 20:10:14,734 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 20:10:15,278 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:10:15,279 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-12 20:10:15,280 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:10:15 BoogieIcfgContainer [2021-06-12 20:10:15,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:10:15,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:10:15,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:10:15,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:10:15,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:10:14" (1/2) ... [2021-06-12 20:10:15,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63d0daef and model type nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:10:15, skipping insertion in model container [2021-06-12 20:10:15,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:10:15" (2/2) ... [2021-06-12 20:10:15,286 INFO L111 eAbstractionObserver]: Analyzing ICFG nzb-file-trans.wvr.bpl [2021-06-12 20:10:15,293 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:10:15,295 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:10:15,295 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:10:15,296 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:10:15,350 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 20:10:15,369 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 20:10:15,399 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:10:15,399 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:10:15,400 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:10:15,400 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:10:15,400 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:10:15,400 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:10:15,400 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:10:15,400 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:10:15,407 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 80 flow [2021-06-12 20:10:15,431 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:15,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:10:15,444 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:15,444 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:15,445 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:15,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:15,450 INFO L82 PathProgramCache]: Analyzing trace with hash 454115418, now seen corresponding path program 1 times [2021-06-12 20:10:15,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:15,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753604772] [2021-06-12 20:10:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:15,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:15,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753604772] [2021-06-12 20:10:15,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753604772] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:10:15,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:10:15,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:10:15,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672174641] [2021-06-12 20:10:15,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:10:15,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:15,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:10:15,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:10:15,744 INFO L87 Difference]: Start difference. First operand has 110 states, 108 states have (on average 3.4814814814814814) internal successors, (376), 109 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:15,920 INFO L93 Difference]: Finished difference Result 265 states and 821 transitions. [2021-06-12 20:10:15,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:10:15,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 20:10:15,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:15,933 INFO L225 Difference]: With dead ends: 265 [2021-06-12 20:10:15,933 INFO L226 Difference]: Without dead ends: 250 [2021-06-12 20:10:15,934 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:10:15,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-12 20:10:15,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 126. [2021-06-12 20:10:15,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.368) internal successors, (421), 125 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:15,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 421 transitions. [2021-06-12 20:10:15,979 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 421 transitions. Word has length 14 [2021-06-12 20:10:15,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:15,980 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 421 transitions. [2021-06-12 20:10:15,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:15,980 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 421 transitions. [2021-06-12 20:10:15,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:10:15,982 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:15,982 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:15,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:10:15,982 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:15,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:15,983 INFO L82 PathProgramCache]: Analyzing trace with hash -947352844, now seen corresponding path program 2 times [2021-06-12 20:10:15,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:15,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397504000] [2021-06-12 20:10:15,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:16,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:16,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397504000] [2021-06-12 20:10:16,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397504000] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:10:16,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:10:16,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:10:16,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419375229] [2021-06-12 20:10:16,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:10:16,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:16,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:10:16,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:10:16,296 INFO L87 Difference]: Start difference. First operand 126 states and 421 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:16,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:16,550 INFO L93 Difference]: Finished difference Result 326 states and 1050 transitions. [2021-06-12 20:10:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:10:16,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 20:10:16,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:16,555 INFO L225 Difference]: With dead ends: 326 [2021-06-12 20:10:16,555 INFO L226 Difference]: Without dead ends: 311 [2021-06-12 20:10:16,555 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:10:16,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-12 20:10:16,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 132. [2021-06-12 20:10:16,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 3.312977099236641) internal successors, (434), 131 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:16,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 434 transitions. [2021-06-12 20:10:16,587 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 434 transitions. Word has length 14 [2021-06-12 20:10:16,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:16,587 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 434 transitions. [2021-06-12 20:10:16,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:16,588 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 434 transitions. [2021-06-12 20:10:16,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:10:16,589 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:16,589 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:16,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 20:10:16,589 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:16,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:16,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1857974612, now seen corresponding path program 3 times [2021-06-12 20:10:16,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:16,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985211828] [2021-06-12 20:10:16,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:16,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:16,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985211828] [2021-06-12 20:10:16,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985211828] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:10:16,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:10:16,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:10:16,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461896045] [2021-06-12 20:10:16,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:10:16,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:16,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:10:16,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:10:16,719 INFO L87 Difference]: Start difference. First operand 132 states and 434 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:16,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:16,876 INFO L93 Difference]: Finished difference Result 261 states and 774 transitions. [2021-06-12 20:10:16,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:10:16,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 20:10:16,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:16,879 INFO L225 Difference]: With dead ends: 261 [2021-06-12 20:10:16,879 INFO L226 Difference]: Without dead ends: 246 [2021-06-12 20:10:16,879 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:10:16,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-12 20:10:16,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 140. [2021-06-12 20:10:16,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:16,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-06-12 20:10:16,902 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-06-12 20:10:16,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:16,902 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-06-12 20:10:16,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:16,902 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-06-12 20:10:16,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:10:16,903 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:16,903 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:16,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 20:10:16,904 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:16,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:16,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1906157040, now seen corresponding path program 4 times [2021-06-12 20:10:16,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:16,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715235021] [2021-06-12 20:10:16,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:17,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:17,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715235021] [2021-06-12 20:10:17,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715235021] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:10:17,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:10:17,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:10:17,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283309666] [2021-06-12 20:10:17,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:10:17,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:17,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:10:17,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:10:17,009 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:17,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:17,167 INFO L93 Difference]: Finished difference Result 264 states and 776 transitions. [2021-06-12 20:10:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:10:17,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 20:10:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:17,170 INFO L225 Difference]: With dead ends: 264 [2021-06-12 20:10:17,170 INFO L226 Difference]: Without dead ends: 249 [2021-06-12 20:10:17,170 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:10:17,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-12 20:10:17,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 140. [2021-06-12 20:10:17,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 3.2949640287769784) internal successors, (458), 139 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:17,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 458 transitions. [2021-06-12 20:10:17,190 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 458 transitions. Word has length 14 [2021-06-12 20:10:17,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:17,190 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 458 transitions. [2021-06-12 20:10:17,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:17,191 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 458 transitions. [2021-06-12 20:10:17,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:10:17,192 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:17,192 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:17,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 20:10:17,192 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:17,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:17,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1941149522, now seen corresponding path program 5 times [2021-06-12 20:10:17,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:17,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916605876] [2021-06-12 20:10:17,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:17,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:17,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916605876] [2021-06-12 20:10:17,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916605876] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:10:17,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:10:17,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:10:17,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829327353] [2021-06-12 20:10:17,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:10:17,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:17,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:10:17,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:10:17,362 INFO L87 Difference]: Start difference. First operand 140 states and 458 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:17,591 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-06-12 20:10:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:17,609 INFO L93 Difference]: Finished difference Result 229 states and 668 transitions. [2021-06-12 20:10:17,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:10:17,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 20:10:17,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:17,611 INFO L225 Difference]: With dead ends: 229 [2021-06-12 20:10:17,611 INFO L226 Difference]: Without dead ends: 214 [2021-06-12 20:10:17,611 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 269.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:10:17,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-12 20:10:17,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 142. [2021-06-12 20:10:17,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-06-12 20:10:17,622 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-06-12 20:10:17,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:17,623 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-06-12 20:10:17,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-06-12 20:10:17,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:10:17,633 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:17,633 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:17,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 20:10:17,633 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:17,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:17,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1674927890, now seen corresponding path program 6 times [2021-06-12 20:10:17,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:17,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622759062] [2021-06-12 20:10:17,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:17,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:17,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622759062] [2021-06-12 20:10:17,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622759062] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:10:17,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:10:17,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:10:17,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925426902] [2021-06-12 20:10:17,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:10:17,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:17,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:10:17,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:10:17,755 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,129 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-06-12 20:10:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:18,167 INFO L93 Difference]: Finished difference Result 336 states and 1030 transitions. [2021-06-12 20:10:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:10:18,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 20:10:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:18,170 INFO L225 Difference]: With dead ends: 336 [2021-06-12 20:10:18,170 INFO L226 Difference]: Without dead ends: 321 [2021-06-12 20:10:18,171 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 307.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:10:18,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-12 20:10:18,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 142. [2021-06-12 20:10:18,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 3.3120567375886525) internal successors, (467), 141 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 467 transitions. [2021-06-12 20:10:18,179 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 467 transitions. Word has length 14 [2021-06-12 20:10:18,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:18,179 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 467 transitions. [2021-06-12 20:10:18,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 467 transitions. [2021-06-12 20:10:18,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:10:18,180 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:18,180 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:18,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 20:10:18,181 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:18,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:18,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1444712772, now seen corresponding path program 1 times [2021-06-12 20:10:18,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:18,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103352028] [2021-06-12 20:10:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:18,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:18,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103352028] [2021-06-12 20:10:18,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103352028] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:10:18,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:10:18,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:10:18,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681165930] [2021-06-12 20:10:18,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:10:18,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:18,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:10:18,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:10:18,198 INFO L87 Difference]: Start difference. First operand 142 states and 467 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:18,203 INFO L93 Difference]: Finished difference Result 166 states and 549 transitions. [2021-06-12 20:10:18,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:10:18,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:10:18,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:18,204 INFO L225 Difference]: With dead ends: 166 [2021-06-12 20:10:18,205 INFO L226 Difference]: Without dead ends: 166 [2021-06-12 20:10:18,205 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:10:18,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-12 20:10:18,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-06-12 20:10:18,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 3.327272727272727) internal successors, (549), 165 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 549 transitions. [2021-06-12 20:10:18,210 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 549 transitions. Word has length 15 [2021-06-12 20:10:18,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:18,211 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 549 transitions. [2021-06-12 20:10:18,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,211 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 549 transitions. [2021-06-12 20:10:18,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:10:18,212 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:18,212 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:18,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 20:10:18,212 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:18,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:18,212 INFO L82 PathProgramCache]: Analyzing trace with hash 868256482, now seen corresponding path program 1 times [2021-06-12 20:10:18,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:18,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645250885] [2021-06-12 20:10:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:18,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:18,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645250885] [2021-06-12 20:10:18,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645250885] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:10:18,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:10:18,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:10:18,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178462475] [2021-06-12 20:10:18,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:10:18,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:18,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:10:18,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:10:18,230 INFO L87 Difference]: Start difference. First operand 166 states and 549 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:18,236 INFO L93 Difference]: Finished difference Result 192 states and 636 transitions. [2021-06-12 20:10:18,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:10:18,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:10:18,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:18,242 INFO L225 Difference]: With dead ends: 192 [2021-06-12 20:10:18,242 INFO L226 Difference]: Without dead ends: 192 [2021-06-12 20:10:18,243 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:10:18,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-06-12 20:10:18,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-06-12 20:10:18,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 3.329842931937173) internal successors, (636), 191 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 636 transitions. [2021-06-12 20:10:18,250 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 636 transitions. Word has length 15 [2021-06-12 20:10:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:18,251 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 636 transitions. [2021-06-12 20:10:18,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,251 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 636 transitions. [2021-06-12 20:10:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 20:10:18,252 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:18,252 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:18,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 20:10:18,252 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:18,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:18,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1029743448, now seen corresponding path program 1 times [2021-06-12 20:10:18,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:18,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319100954] [2021-06-12 20:10:18,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:18,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:18,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319100954] [2021-06-12 20:10:18,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319100954] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:10:18,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:10:18,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:10:18,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682517802] [2021-06-12 20:10:18,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:10:18,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:18,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:10:18,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:10:18,270 INFO L87 Difference]: Start difference. First operand 192 states and 636 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:18,276 INFO L93 Difference]: Finished difference Result 223 states and 739 transitions. [2021-06-12 20:10:18,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:10:18,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 20:10:18,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:18,279 INFO L225 Difference]: With dead ends: 223 [2021-06-12 20:10:18,279 INFO L226 Difference]: Without dead ends: 223 [2021-06-12 20:10:18,280 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:10:18,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-12 20:10:18,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-06-12 20:10:18,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.328828828828829) internal successors, (739), 222 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 739 transitions. [2021-06-12 20:10:18,287 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 739 transitions. Word has length 15 [2021-06-12 20:10:18,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:18,288 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 739 transitions. [2021-06-12 20:10:18,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,288 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 739 transitions. [2021-06-12 20:10:18,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:10:18,289 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:18,289 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:18,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-12 20:10:18,289 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:18,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:18,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1505443044, now seen corresponding path program 1 times [2021-06-12 20:10:18,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:18,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752216066] [2021-06-12 20:10:18,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:18,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:18,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752216066] [2021-06-12 20:10:18,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752216066] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:10:18,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:10:18,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:10:18,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904548384] [2021-06-12 20:10:18,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:10:18,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:18,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:10:18,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:10:18,356 INFO L87 Difference]: Start difference. First operand 223 states and 739 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:18,400 INFO L93 Difference]: Finished difference Result 414 states and 1238 transitions. [2021-06-12 20:10:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:10:18,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:10:18,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:18,403 INFO L225 Difference]: With dead ends: 414 [2021-06-12 20:10:18,403 INFO L226 Difference]: Without dead ends: 366 [2021-06-12 20:10:18,403 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:10:18,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-12 20:10:18,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 223. [2021-06-12 20:10:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 3.3063063063063063) internal successors, (734), 222 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 734 transitions. [2021-06-12 20:10:18,412 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 734 transitions. Word has length 16 [2021-06-12 20:10:18,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:18,412 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 734 transitions. [2021-06-12 20:10:18,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,413 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 734 transitions. [2021-06-12 20:10:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:10:18,413 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:18,414 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:18,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-12 20:10:18,414 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:18,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:18,414 INFO L82 PathProgramCache]: Analyzing trace with hash 821727578, now seen corresponding path program 1 times [2021-06-12 20:10:18,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:18,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220710304] [2021-06-12 20:10:18,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:18,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:18,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220710304] [2021-06-12 20:10:18,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220710304] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:10:18,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:10:18,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:10:18,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872048350] [2021-06-12 20:10:18,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:10:18,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:18,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:10:18,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:10:18,448 INFO L87 Difference]: Start difference. First operand 223 states and 734 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:18,549 INFO L93 Difference]: Finished difference Result 571 states and 1740 transitions. [2021-06-12 20:10:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:10:18,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:10:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:18,552 INFO L225 Difference]: With dead ends: 571 [2021-06-12 20:10:18,552 INFO L226 Difference]: Without dead ends: 495 [2021-06-12 20:10:18,553 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:10:18,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-12 20:10:18,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 233. [2021-06-12 20:10:18,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 3.2456896551724137) internal successors, (753), 232 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 753 transitions. [2021-06-12 20:10:18,567 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 753 transitions. Word has length 16 [2021-06-12 20:10:18,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:18,567 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 753 transitions. [2021-06-12 20:10:18,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,567 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 753 transitions. [2021-06-12 20:10:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:10:18,568 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:18,568 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:18,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-12 20:10:18,569 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:18,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:18,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1911442418, now seen corresponding path program 2 times [2021-06-12 20:10:18,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:18,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599076032] [2021-06-12 20:10:18,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:18,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:18,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599076032] [2021-06-12 20:10:18,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599076032] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:10:18,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:10:18,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:10:18,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512513209] [2021-06-12 20:10:18,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:10:18,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:18,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:10:18,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:10:18,691 INFO L87 Difference]: Start difference. First operand 233 states and 753 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:18,706 INFO L93 Difference]: Finished difference Result 347 states and 1054 transitions. [2021-06-12 20:10:18,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:10:18,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:10:18,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:18,709 INFO L225 Difference]: With dead ends: 347 [2021-06-12 20:10:18,709 INFO L226 Difference]: Without dead ends: 283 [2021-06-12 20:10:18,709 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:10:18,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-12 20:10:18,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-06-12 20:10:18,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 3.2620087336244543) internal successors, (747), 229 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 747 transitions. [2021-06-12 20:10:18,716 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 747 transitions. Word has length 16 [2021-06-12 20:10:18,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:18,716 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 747 transitions. [2021-06-12 20:10:18,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:18,716 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 747 transitions. [2021-06-12 20:10:18,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:10:18,717 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:18,717 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:18,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-12 20:10:18,717 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:18,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:18,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2095449492, now seen corresponding path program 1 times [2021-06-12 20:10:18,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:18,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416083339] [2021-06-12 20:10:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:18,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:18,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416083339] [2021-06-12 20:10:18,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416083339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:18,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709859238] [2021-06-12 20:10:18,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:18,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 20:10:18,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:18,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709859238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:18,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:18,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-12 20:10:18,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880689693] [2021-06-12 20:10:18,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:10:18,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:18,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:10:18,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:10:18,989 INFO L87 Difference]: Start difference. First operand 230 states and 747 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:19,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:19,131 INFO L93 Difference]: Finished difference Result 529 states and 1519 transitions. [2021-06-12 20:10:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:10:19,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:10:19,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:19,134 INFO L225 Difference]: With dead ends: 529 [2021-06-12 20:10:19,135 INFO L226 Difference]: Without dead ends: 455 [2021-06-12 20:10:19,135 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:10:19,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-12 20:10:19,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 240. [2021-06-12 20:10:19,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 3.1380753138075312) internal successors, (750), 239 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:19,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 750 transitions. [2021-06-12 20:10:19,150 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 750 transitions. Word has length 16 [2021-06-12 20:10:19,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:19,150 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 750 transitions. [2021-06-12 20:10:19,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 750 transitions. [2021-06-12 20:10:19,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:10:19,151 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:19,151 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:19,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-12 20:10:19,365 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:19,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:19,365 INFO L82 PathProgramCache]: Analyzing trace with hash 364875434, now seen corresponding path program 3 times [2021-06-12 20:10:19,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:19,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409947777] [2021-06-12 20:10:19,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:19,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:19,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409947777] [2021-06-12 20:10:19,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409947777] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:10:19,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:10:19,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:10:19,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369441447] [2021-06-12 20:10:19,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:10:19,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:19,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:10:19,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:10:19,404 INFO L87 Difference]: Start difference. First operand 240 states and 750 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:19,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:19,425 INFO L93 Difference]: Finished difference Result 335 states and 978 transitions. [2021-06-12 20:10:19,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:10:19,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:10:19,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:19,427 INFO L225 Difference]: With dead ends: 335 [2021-06-12 20:10:19,427 INFO L226 Difference]: Without dead ends: 263 [2021-06-12 20:10:19,427 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:10:19,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-12 20:10:19,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 234. [2021-06-12 20:10:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 3.0257510729613735) internal successors, (705), 233 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 705 transitions. [2021-06-12 20:10:19,434 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 705 transitions. Word has length 16 [2021-06-12 20:10:19,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:19,434 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 705 transitions. [2021-06-12 20:10:19,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:19,434 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 705 transitions. [2021-06-12 20:10:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:10:19,435 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:19,435 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:19,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-12 20:10:19,435 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:19,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:19,436 INFO L82 PathProgramCache]: Analyzing trace with hash -792720916, now seen corresponding path program 2 times [2021-06-12 20:10:19,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:19,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382089412] [2021-06-12 20:10:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:19,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:19,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382089412] [2021-06-12 20:10:19,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382089412] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:10:19,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:10:19,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:10:19,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192216925] [2021-06-12 20:10:19,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:10:19,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:19,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:10:19,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:10:19,477 INFO L87 Difference]: Start difference. First operand 234 states and 705 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:19,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:19,491 INFO L93 Difference]: Finished difference Result 314 states and 885 transitions. [2021-06-12 20:10:19,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:10:19,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:10:19,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:19,494 INFO L225 Difference]: With dead ends: 314 [2021-06-12 20:10:19,494 INFO L226 Difference]: Without dead ends: 244 [2021-06-12 20:10:19,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:10:19,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-12 20:10:19,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 213. [2021-06-12 20:10:19,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.9669811320754715) internal successors, (629), 212 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:19,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 629 transitions. [2021-06-12 20:10:19,504 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 629 transitions. Word has length 16 [2021-06-12 20:10:19,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:19,504 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 629 transitions. [2021-06-12 20:10:19,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:19,504 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 629 transitions. [2021-06-12 20:10:19,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:10:19,505 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:19,505 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:19,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-12 20:10:19,505 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:19,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:19,505 INFO L82 PathProgramCache]: Analyzing trace with hash -507279316, now seen corresponding path program 2 times [2021-06-12 20:10:19,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:19,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47109962] [2021-06-12 20:10:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:19,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:19,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47109962] [2021-06-12 20:10:19,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47109962] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:10:19,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:10:19,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:10:19,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493238105] [2021-06-12 20:10:19,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:10:19,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:19,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:10:19,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:10:19,557 INFO L87 Difference]: Start difference. First operand 213 states and 629 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:19,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:19,580 INFO L93 Difference]: Finished difference Result 281 states and 773 transitions. [2021-06-12 20:10:19,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:10:19,580 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:10:19,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:19,582 INFO L225 Difference]: With dead ends: 281 [2021-06-12 20:10:19,582 INFO L226 Difference]: Without dead ends: 240 [2021-06-12 20:10:19,582 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:10:19,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-12 20:10:19,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 209. [2021-06-12 20:10:19,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.985576923076923) internal successors, (621), 208 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:19,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 621 transitions. [2021-06-12 20:10:19,588 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 621 transitions. Word has length 16 [2021-06-12 20:10:19,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:19,588 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 621 transitions. [2021-06-12 20:10:19,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:19,588 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 621 transitions. [2021-06-12 20:10:19,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:10:19,590 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:19,590 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:19,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-12 20:10:19,591 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:19,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:19,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1232360210, now seen corresponding path program 3 times [2021-06-12 20:10:19,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:19,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019369025] [2021-06-12 20:10:19,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:19,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:19,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019369025] [2021-06-12 20:10:19,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019369025] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:10:19,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:10:19,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:10:19,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571881630] [2021-06-12 20:10:19,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:10:19,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:19,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:10:19,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:10:19,628 INFO L87 Difference]: Start difference. First operand 209 states and 621 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:19,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:19,668 INFO L93 Difference]: Finished difference Result 238 states and 670 transitions. [2021-06-12 20:10:19,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:10:19,668 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:10:19,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:19,685 INFO L225 Difference]: With dead ends: 238 [2021-06-12 20:10:19,685 INFO L226 Difference]: Without dead ends: 189 [2021-06-12 20:10:19,685 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:10:19,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-12 20:10:19,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-06-12 20:10:19,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-06-12 20:10:19,690 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 16 [2021-06-12 20:10:19,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:19,690 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-06-12 20:10:19,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:19,691 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-06-12 20:10:19,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:10:19,691 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:19,691 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:19,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-12 20:10:19,691 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:19,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:19,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1392682474, now seen corresponding path program 1 times [2021-06-12 20:10:19,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:19,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069949717] [2021-06-12 20:10:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:19,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:19,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069949717] [2021-06-12 20:10:19,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069949717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:19,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363132384] [2021-06-12 20:10:19,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:19,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:10:19,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:20,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363132384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:20,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:20,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-12 20:10:20,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211631729] [2021-06-12 20:10:20,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:10:20,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:20,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:10:20,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:10:20,387 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:21,270 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-06-12 20:10:21,677 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-12 20:10:21,829 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2021-06-12 20:10:21,998 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-12 20:10:22,235 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-06-12 20:10:22,410 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-06-12 20:10:22,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:22,481 INFO L93 Difference]: Finished difference Result 577 states and 1611 transitions. [2021-06-12 20:10:22,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:10:22,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:10:22,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:22,484 INFO L225 Difference]: With dead ends: 577 [2021-06-12 20:10:22,484 INFO L226 Difference]: Without dead ends: 486 [2021-06-12 20:10:22,485 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1839.5ms TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:10:22,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-12 20:10:22,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 243. [2021-06-12 20:10:22,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.9545454545454546) internal successors, (715), 242 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:22,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 715 transitions. [2021-06-12 20:10:22,494 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 715 transitions. Word has length 20 [2021-06-12 20:10:22,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:22,495 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 715 transitions. [2021-06-12 20:10:22,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:22,496 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 715 transitions. [2021-06-12 20:10:22,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:10:22,496 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:22,496 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:22,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 20:10:22,720 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:22,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:22,720 INFO L82 PathProgramCache]: Analyzing trace with hash 56489052, now seen corresponding path program 2 times [2021-06-12 20:10:22,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:22,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234308284] [2021-06-12 20:10:22,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:22,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:22,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:22,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234308284] [2021-06-12 20:10:22,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234308284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:22,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806788064] [2021-06-12 20:10:22,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:22,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:10:22,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:22,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:10:23,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:23,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806788064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:23,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:23,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-12 20:10:23,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709445892] [2021-06-12 20:10:23,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:10:23,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:10:23,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:10:23,416 INFO L87 Difference]: Start difference. First operand 243 states and 715 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:24,048 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-06-12 20:10:24,726 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-06-12 20:10:24,859 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-12 20:10:25,120 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-12 20:10:25,686 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-12 20:10:26,792 WARN L205 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-06-12 20:10:27,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:27,193 INFO L93 Difference]: Finished difference Result 801 states and 2205 transitions. [2021-06-12 20:10:27,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:10:27,193 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:10:27,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:27,196 INFO L225 Difference]: With dead ends: 801 [2021-06-12 20:10:27,196 INFO L226 Difference]: Without dead ends: 633 [2021-06-12 20:10:27,197 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 3568.4ms TimeCoverageRelationStatistics Valid=284, Invalid=1122, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:10:27,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-12 20:10:27,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 284. [2021-06-12 20:10:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.954063604240283) internal successors, (836), 283 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:27,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 836 transitions. [2021-06-12 20:10:27,206 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 836 transitions. Word has length 20 [2021-06-12 20:10:27,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:27,206 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 836 transitions. [2021-06-12 20:10:27,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:27,206 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 836 transitions. [2021-06-12 20:10:27,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:10:27,207 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:27,207 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:27,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:27,430 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:27,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:27,431 INFO L82 PathProgramCache]: Analyzing trace with hash 2054143060, now seen corresponding path program 3 times [2021-06-12 20:10:27,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:27,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266378127] [2021-06-12 20:10:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:27,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:27,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266378127] [2021-06-12 20:10:27,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266378127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:27,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686032426] [2021-06-12 20:10:27,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:27,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:10:27,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:27,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:10:27,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:28,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686032426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:28,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:28,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-12 20:10:28,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130313394] [2021-06-12 20:10:28,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:10:28,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:28,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:10:28,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:10:28,173 INFO L87 Difference]: Start difference. First operand 284 states and 836 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:29,068 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-06-12 20:10:29,761 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-12 20:10:29,886 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-06-12 20:10:30,128 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-06-12 20:10:30,341 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-06-12 20:10:30,525 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-06-12 20:10:30,923 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-06-12 20:10:31,651 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-06-12 20:10:31,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:31,722 INFO L93 Difference]: Finished difference Result 766 states and 2175 transitions. [2021-06-12 20:10:31,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:10:31,722 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:10:31,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:31,725 INFO L225 Difference]: With dead ends: 766 [2021-06-12 20:10:31,725 INFO L226 Difference]: Without dead ends: 654 [2021-06-12 20:10:31,726 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3318.6ms TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:10:31,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-12 20:10:31,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 303. [2021-06-12 20:10:31,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.9205298013245033) internal successors, (882), 302 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:31,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 882 transitions. [2021-06-12 20:10:31,736 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 882 transitions. Word has length 20 [2021-06-12 20:10:31,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:31,736 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 882 transitions. [2021-06-12 20:10:31,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:31,737 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 882 transitions. [2021-06-12 20:10:31,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:10:31,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:31,738 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:31,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:31,953 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:31,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:31,953 INFO L82 PathProgramCache]: Analyzing trace with hash 585717068, now seen corresponding path program 4 times [2021-06-12 20:10:31,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:31,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78678025] [2021-06-12 20:10:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:32,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:32,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:32,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78678025] [2021-06-12 20:10:32,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78678025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:32,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208864336] [2021-06-12 20:10:32,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:32,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:10:32,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:32,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:10:32,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:32,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208864336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:32,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:32,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-12 20:10:32,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15523768] [2021-06-12 20:10:32,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:10:32,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:32,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:10:32,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:10:32,649 INFO L87 Difference]: Start difference. First operand 303 states and 882 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:33,584 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-06-12 20:10:34,094 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-06-12 20:10:34,297 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-06-12 20:10:34,640 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-06-12 20:10:35,017 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-12 20:10:35,256 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-06-12 20:10:35,562 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-12 20:10:35,782 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-12 20:10:35,916 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-06-12 20:10:36,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:36,051 INFO L93 Difference]: Finished difference Result 971 states and 2714 transitions. [2021-06-12 20:10:36,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:10:36,051 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:10:36,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:36,072 INFO L225 Difference]: With dead ends: 971 [2021-06-12 20:10:36,072 INFO L226 Difference]: Without dead ends: 736 [2021-06-12 20:10:36,072 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 3246.1ms TimeCoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:10:36,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-12 20:10:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 362. [2021-06-12 20:10:36,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 3.0554016620498614) internal successors, (1103), 361 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:36,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1103 transitions. [2021-06-12 20:10:36,082 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1103 transitions. Word has length 20 [2021-06-12 20:10:36,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:36,083 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1103 transitions. [2021-06-12 20:10:36,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:36,083 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1103 transitions. [2021-06-12 20:10:36,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:10:36,084 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:36,084 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:36,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 20:10:36,313 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:36,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:36,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2103334614, now seen corresponding path program 5 times [2021-06-12 20:10:36,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:36,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38736245] [2021-06-12 20:10:36,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:36,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:36,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38736245] [2021-06-12 20:10:36,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38736245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:36,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675255916] [2021-06-12 20:10:36,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:36,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:10:36,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:36,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:10:36,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:36,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675255916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:36,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:36,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-12 20:10:36,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163933384] [2021-06-12 20:10:36,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:10:36,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:36,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:10:36,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:10:36,889 INFO L87 Difference]: Start difference. First operand 362 states and 1103 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:38,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:38,198 INFO L93 Difference]: Finished difference Result 667 states and 1967 transitions. [2021-06-12 20:10:38,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:10:38,198 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:10:38,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:38,201 INFO L225 Difference]: With dead ends: 667 [2021-06-12 20:10:38,201 INFO L226 Difference]: Without dead ends: 592 [2021-06-12 20:10:38,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1133.3ms TimeCoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:10:38,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-12 20:10:38,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 368. [2021-06-12 20:10:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.0544959128065394) internal successors, (1121), 367 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1121 transitions. [2021-06-12 20:10:38,211 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1121 transitions. Word has length 20 [2021-06-12 20:10:38,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:38,211 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1121 transitions. [2021-06-12 20:10:38,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:38,211 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1121 transitions. [2021-06-12 20:10:38,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:10:38,212 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:38,212 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:38,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:38,449 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:38,449 INFO L82 PathProgramCache]: Analyzing trace with hash -927843970, now seen corresponding path program 6 times [2021-06-12 20:10:38,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:38,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070955234] [2021-06-12 20:10:38,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:38,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:38,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070955234] [2021-06-12 20:10:38,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070955234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:38,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417993263] [2021-06-12 20:10:38,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:38,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:10:38,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:38,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:10:38,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:38,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417993263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:38,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:38,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:10:38,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067709236] [2021-06-12 20:10:38,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:10:38,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:38,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:10:38,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:10:38,954 INFO L87 Difference]: Start difference. First operand 368 states and 1121 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:39,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:39,233 INFO L93 Difference]: Finished difference Result 643 states and 1884 transitions. [2021-06-12 20:10:39,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:10:39,234 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:10:39,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:39,236 INFO L225 Difference]: With dead ends: 643 [2021-06-12 20:10:39,236 INFO L226 Difference]: Without dead ends: 565 [2021-06-12 20:10:39,236 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:10:39,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-12 20:10:39,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 374. [2021-06-12 20:10:39,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 3.06970509383378) internal successors, (1145), 373 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:39,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1145 transitions. [2021-06-12 20:10:39,245 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1145 transitions. Word has length 20 [2021-06-12 20:10:39,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:39,245 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1145 transitions. [2021-06-12 20:10:39,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:39,245 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1145 transitions. [2021-06-12 20:10:39,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:10:39,246 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:39,246 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:39,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:39,469 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:39,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:39,469 INFO L82 PathProgramCache]: Analyzing trace with hash 685722764, now seen corresponding path program 7 times [2021-06-12 20:10:39,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:39,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758057024] [2021-06-12 20:10:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:39,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:39,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758057024] [2021-06-12 20:10:39,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758057024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:39,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969185561] [2021-06-12 20:10:39,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:39,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:10:39,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:40,233 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1, ends_with_6], 1=[ends_with_2]} [2021-06-12 20:10:40,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:10:40,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:40,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:10:40,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:40,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:10:40,255 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:40,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:10:40,260 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:40,265 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:10:40,266 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:40,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:10:40,270 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:40,342 INFO L628 ElimStorePlain]: treesize reduction 83, result has 46.1 percent of original size [2021-06-12 20:10:40,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:10:40,359 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:40,401 INFO L628 ElimStorePlain]: treesize reduction 25, result has 63.2 percent of original size [2021-06-12 20:10:40,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:10:40,405 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:40,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:10:40,408 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:40,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:40,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:10:40,424 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:278, output treesize:20 [2021-06-12 20:10:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:40,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969185561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:40,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:40,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-12 20:10:40,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832767635] [2021-06-12 20:10:40,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:10:40,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:40,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:10:40,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:10:40,509 INFO L87 Difference]: Start difference. First operand 374 states and 1145 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:41,373 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-12 20:10:41,655 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-06-12 20:10:41,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:41,864 INFO L93 Difference]: Finished difference Result 613 states and 1787 transitions. [2021-06-12 20:10:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:10:41,865 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:10:41,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:41,867 INFO L225 Difference]: With dead ends: 613 [2021-06-12 20:10:41,867 INFO L226 Difference]: Without dead ends: 553 [2021-06-12 20:10:41,867 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1214.8ms TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:10:41,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-12 20:10:41,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 384. [2021-06-12 20:10:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.0548302872062663) internal successors, (1170), 383 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:41,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1170 transitions. [2021-06-12 20:10:41,876 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1170 transitions. Word has length 20 [2021-06-12 20:10:41,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:41,876 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1170 transitions. [2021-06-12 20:10:41,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:41,876 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1170 transitions. [2021-06-12 20:10:41,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:10:41,877 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:41,877 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:42,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-12 20:10:42,093 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:42,093 INFO L82 PathProgramCache]: Analyzing trace with hash 504067178, now seen corresponding path program 8 times [2021-06-12 20:10:42,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:42,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530387805] [2021-06-12 20:10:42,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:42,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:42,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:42,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530387805] [2021-06-12 20:10:42,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530387805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:42,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677912311] [2021-06-12 20:10:42,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:42,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:10:42,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:42,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:10:42,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:42,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677912311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:42,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:42,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 20:10:42,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027256248] [2021-06-12 20:10:42,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:10:42,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:42,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:10:42,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:10:42,543 INFO L87 Difference]: Start difference. First operand 384 states and 1170 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:42,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:42,862 INFO L93 Difference]: Finished difference Result 663 states and 1941 transitions. [2021-06-12 20:10:42,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:10:42,863 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:10:42,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:42,865 INFO L225 Difference]: With dead ends: 663 [2021-06-12 20:10:42,865 INFO L226 Difference]: Without dead ends: 537 [2021-06-12 20:10:42,866 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 404.8ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:10:42,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-12 20:10:42,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 389. [2021-06-12 20:10:42,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.054123711340206) internal successors, (1185), 388 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1185 transitions. [2021-06-12 20:10:42,880 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1185 transitions. Word has length 20 [2021-06-12 20:10:42,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:42,880 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1185 transitions. [2021-06-12 20:10:42,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:42,881 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1185 transitions. [2021-06-12 20:10:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:10:42,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:42,882 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:43,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:43,097 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:43,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:43,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1287248534, now seen corresponding path program 9 times [2021-06-12 20:10:43,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:43,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055452493] [2021-06-12 20:10:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:43,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:43,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055452493] [2021-06-12 20:10:43,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055452493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:43,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441644603] [2021-06-12 20:10:43,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:43,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:10:43,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:43,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:10:43,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:43,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441644603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:43,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:43,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 20:10:43,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217420139] [2021-06-12 20:10:43,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:10:43,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:43,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:10:43,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:10:43,560 INFO L87 Difference]: Start difference. First operand 389 states and 1185 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:44,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:44,083 INFO L93 Difference]: Finished difference Result 865 states and 2507 transitions. [2021-06-12 20:10:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:10:44,083 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:10:44,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:44,086 INFO L225 Difference]: With dead ends: 865 [2021-06-12 20:10:44,086 INFO L226 Difference]: Without dead ends: 722 [2021-06-12 20:10:44,087 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 622.3ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:10:44,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-06-12 20:10:44,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 395. [2021-06-12 20:10:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.068527918781726) internal successors, (1209), 394 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1209 transitions. [2021-06-12 20:10:44,097 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1209 transitions. Word has length 20 [2021-06-12 20:10:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:44,097 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1209 transitions. [2021-06-12 20:10:44,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1209 transitions. [2021-06-12 20:10:44,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:10:44,098 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:44,098 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:44,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-12 20:10:44,313 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:44,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:44,313 INFO L82 PathProgramCache]: Analyzing trace with hash 326318200, now seen corresponding path program 10 times [2021-06-12 20:10:44,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:44,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832848510] [2021-06-12 20:10:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:44,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:44,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832848510] [2021-06-12 20:10:44,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832848510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:44,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430563686] [2021-06-12 20:10:44,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:44,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:10:44,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:44,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:10:44,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:44,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430563686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:44,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:44,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 20:10:44,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177817270] [2021-06-12 20:10:44,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:10:44,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:44,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:10:44,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:10:44,729 INFO L87 Difference]: Start difference. First operand 395 states and 1209 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:45,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:45,057 INFO L93 Difference]: Finished difference Result 717 states and 2094 transitions. [2021-06-12 20:10:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:10:45,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:10:45,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:45,059 INFO L225 Difference]: With dead ends: 717 [2021-06-12 20:10:45,059 INFO L226 Difference]: Without dead ends: 558 [2021-06-12 20:10:45,059 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 441.4ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:10:45,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-12 20:10:45,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 389. [2021-06-12 20:10:45,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 3.054123711340206) internal successors, (1185), 388 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:45,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1185 transitions. [2021-06-12 20:10:45,067 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1185 transitions. Word has length 20 [2021-06-12 20:10:45,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:45,067 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1185 transitions. [2021-06-12 20:10:45,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:45,068 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1185 transitions. [2021-06-12 20:10:45,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:10:45,069 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:45,069 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:45,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-12 20:10:45,292 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:45,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1731378416, now seen corresponding path program 11 times [2021-06-12 20:10:45,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:45,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841713090] [2021-06-12 20:10:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:45,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:45,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841713090] [2021-06-12 20:10:45,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841713090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:45,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429327562] [2021-06-12 20:10:45,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:45,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:10:45,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:45,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:10:45,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:45,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429327562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:45,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:45,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 20:10:45,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450756521] [2021-06-12 20:10:45,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:10:45,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:45,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:10:45,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:10:45,877 INFO L87 Difference]: Start difference. First operand 389 states and 1185 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:47,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:47,613 INFO L93 Difference]: Finished difference Result 980 states and 2855 transitions. [2021-06-12 20:10:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:10:47,613 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:10:47,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:47,616 INFO L225 Difference]: With dead ends: 980 [2021-06-12 20:10:47,617 INFO L226 Difference]: Without dead ends: 780 [2021-06-12 20:10:47,617 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1547.6ms TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:10:47,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-06-12 20:10:47,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 442. [2021-06-12 20:10:47,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0657596371882088) internal successors, (1352), 441 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:47,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1352 transitions. [2021-06-12 20:10:47,627 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1352 transitions. Word has length 20 [2021-06-12 20:10:47,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:47,627 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1352 transitions. [2021-06-12 20:10:47,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:47,627 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1352 transitions. [2021-06-12 20:10:47,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:10:47,628 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:47,629 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:47,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-12 20:10:47,844 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:47,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:47,844 INFO L82 PathProgramCache]: Analyzing trace with hash -852916892, now seen corresponding path program 12 times [2021-06-12 20:10:47,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:47,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773497573] [2021-06-12 20:10:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:47,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:47,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773497573] [2021-06-12 20:10:47,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773497573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:47,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913079741] [2021-06-12 20:10:47,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:48,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:10:48,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:48,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:10:48,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:48,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:10:48,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:48,183 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.5 percent of original size [2021-06-12 20:10:48,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:10:48,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:48,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:10:48,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:48,244 INFO L628 ElimStorePlain]: treesize reduction 18, result has 76.6 percent of original size [2021-06-12 20:10:48,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:10:48,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:48,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:10:48,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:10:48,273 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:91, output treesize:55 [2021-06-12 20:10:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:48,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913079741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:48,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:48,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:10:48,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611849776] [2021-06-12 20:10:48,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:10:48,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:48,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:10:48,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:10:48,634 INFO L87 Difference]: Start difference. First operand 442 states and 1352 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:49,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:49,006 INFO L93 Difference]: Finished difference Result 830 states and 2406 transitions. [2021-06-12 20:10:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:10:49,007 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:10:49,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:49,009 INFO L225 Difference]: With dead ends: 830 [2021-06-12 20:10:49,009 INFO L226 Difference]: Without dead ends: 687 [2021-06-12 20:10:49,009 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 492.3ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:10:49,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-12 20:10:49,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 452. [2021-06-12 20:10:49,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.0776053215077606) internal successors, (1388), 451 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:49,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1388 transitions. [2021-06-12 20:10:49,018 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1388 transitions. Word has length 20 [2021-06-12 20:10:49,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:49,019 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1388 transitions. [2021-06-12 20:10:49,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:49,019 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1388 transitions. [2021-06-12 20:10:49,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 20:10:49,020 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:49,020 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:49,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-12 20:10:49,220 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:49,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:49,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1463437194, now seen corresponding path program 13 times [2021-06-12 20:10:49,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:49,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676126290] [2021-06-12 20:10:49,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:49,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:49,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676126290] [2021-06-12 20:10:49,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676126290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:49,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656026425] [2021-06-12 20:10:49,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:49,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:10:49,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:49,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656026425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:49,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:49,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 20:10:49,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629235192] [2021-06-12 20:10:49,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:10:49,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:49,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:10:49,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:10:49,599 INFO L87 Difference]: Start difference. First operand 452 states and 1388 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:49,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:49,740 INFO L93 Difference]: Finished difference Result 595 states and 1752 transitions. [2021-06-12 20:10:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:10:49,740 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 20:10:49,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:49,742 INFO L225 Difference]: With dead ends: 595 [2021-06-12 20:10:49,742 INFO L226 Difference]: Without dead ends: 475 [2021-06-12 20:10:49,743 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:10:49,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-12 20:10:49,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 442. [2021-06-12 20:10:49,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0657596371882088) internal successors, (1352), 441 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:49,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1352 transitions. [2021-06-12 20:10:49,751 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1352 transitions. Word has length 20 [2021-06-12 20:10:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:49,751 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1352 transitions. [2021-06-12 20:10:49,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1352 transitions. [2021-06-12 20:10:49,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:10:49,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:49,752 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:49,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:49,976 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:49,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:49,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1353227094, now seen corresponding path program 14 times [2021-06-12 20:10:49,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:49,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936658588] [2021-06-12 20:10:49,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:50,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:50,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936658588] [2021-06-12 20:10:50,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936658588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:50,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000442710] [2021-06-12 20:10:50,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:50,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:10:50,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:50,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:10:50,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:50,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:10:50,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:50,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:10:50,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:50,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:10:50,186 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:50,232 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-12 20:10:50,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:10:50,236 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:50,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:10:50,240 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:50,271 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-12 20:10:50,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:10:50,273 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-12 20:10:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:50,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000442710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:50,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:50,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 20:10:50,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361023066] [2021-06-12 20:10:50,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:10:50,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:50,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:10:50,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:10:50,322 INFO L87 Difference]: Start difference. First operand 442 states and 1352 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:50,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:50,513 INFO L93 Difference]: Finished difference Result 699 states and 2099 transitions. [2021-06-12 20:10:50,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:10:50,514 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:10:50,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:50,516 INFO L225 Difference]: With dead ends: 699 [2021-06-12 20:10:50,516 INFO L226 Difference]: Without dead ends: 648 [2021-06-12 20:10:50,516 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:10:50,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-06-12 20:10:50,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 421. [2021-06-12 20:10:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.0904761904761906) internal successors, (1298), 420 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:50,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1298 transitions. [2021-06-12 20:10:50,525 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1298 transitions. Word has length 21 [2021-06-12 20:10:50,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:50,525 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1298 transitions. [2021-06-12 20:10:50,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:50,526 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1298 transitions. [2021-06-12 20:10:50,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:10:50,527 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:50,527 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:50,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-12 20:10:50,751 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:50,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:50,752 INFO L82 PathProgramCache]: Analyzing trace with hash -2142789994, now seen corresponding path program 15 times [2021-06-12 20:10:50,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:50,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296889496] [2021-06-12 20:10:50,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:50,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:50,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296889496] [2021-06-12 20:10:50,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296889496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:50,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809821412] [2021-06-12 20:10:50,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:50,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:10:50,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:50,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:10:50,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:50,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:10:50,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:50,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:10:50,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:50,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:10:50,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:51,035 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-12 20:10:51,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:10:51,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:51,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:10:51,042 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:10:51,069 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-12 20:10:51,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:10:51,070 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-12 20:10:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:51,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809821412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:51,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:51,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 20:10:51,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702764899] [2021-06-12 20:10:51,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:10:51,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:51,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:10:51,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:10:51,114 INFO L87 Difference]: Start difference. First operand 421 states and 1298 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:51,421 INFO L93 Difference]: Finished difference Result 665 states and 2020 transitions. [2021-06-12 20:10:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:10:51,421 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:10:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:51,423 INFO L225 Difference]: With dead ends: 665 [2021-06-12 20:10:51,423 INFO L226 Difference]: Without dead ends: 614 [2021-06-12 20:10:51,425 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:10:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-12 20:10:51,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 432. [2021-06-12 20:10:51,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 3.1113689095127612) internal successors, (1341), 431 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1341 transitions. [2021-06-12 20:10:51,434 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1341 transitions. Word has length 21 [2021-06-12 20:10:51,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:51,435 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1341 transitions. [2021-06-12 20:10:51,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1341 transitions. [2021-06-12 20:10:51,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:10:51,436 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:51,436 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:51,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:51,659 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:51,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:51,660 INFO L82 PathProgramCache]: Analyzing trace with hash -967299350, now seen corresponding path program 16 times [2021-06-12 20:10:51,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:51,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292906254] [2021-06-12 20:10:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:52,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:52,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292906254] [2021-06-12 20:10:52,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292906254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:52,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483165455] [2021-06-12 20:10:52,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:52,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:10:52,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:52,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:10:52,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:52,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483165455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:52,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:52,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 20:10:52,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162724366] [2021-06-12 20:10:52,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:10:52,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:52,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:10:52,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:10:52,253 INFO L87 Difference]: Start difference. First operand 432 states and 1341 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:52,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:52,547 INFO L93 Difference]: Finished difference Result 728 states and 2188 transitions. [2021-06-12 20:10:52,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:10:52,547 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:10:52,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:52,550 INFO L225 Difference]: With dead ends: 728 [2021-06-12 20:10:52,550 INFO L226 Difference]: Without dead ends: 677 [2021-06-12 20:10:52,551 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 454.3ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:10:52,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-12 20:10:52,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 443. [2021-06-12 20:10:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.1561085972850678) internal successors, (1395), 442 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:52,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1395 transitions. [2021-06-12 20:10:52,574 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1395 transitions. Word has length 21 [2021-06-12 20:10:52,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:52,574 INFO L482 AbstractCegarLoop]: Abstraction has 443 states and 1395 transitions. [2021-06-12 20:10:52,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:52,574 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1395 transitions. [2021-06-12 20:10:52,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:10:52,575 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:52,575 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:52,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-12 20:10:52,801 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:52,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:52,802 INFO L82 PathProgramCache]: Analyzing trace with hash 646267384, now seen corresponding path program 17 times [2021-06-12 20:10:52,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:52,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885807219] [2021-06-12 20:10:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:52,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:52,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:52,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885807219] [2021-06-12 20:10:52,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885807219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:52,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865190362] [2021-06-12 20:10:52,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:53,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:10:53,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:53,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:10:53,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:10:53,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865190362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:53,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:53,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:10:53,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926552082] [2021-06-12 20:10:53,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:10:53,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:53,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:10:53,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:10:53,342 INFO L87 Difference]: Start difference. First operand 443 states and 1395 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:53,708 INFO L93 Difference]: Finished difference Result 654 states and 1967 transitions. [2021-06-12 20:10:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:10:53,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:10:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:53,726 INFO L225 Difference]: With dead ends: 654 [2021-06-12 20:10:53,727 INFO L226 Difference]: Without dead ends: 591 [2021-06-12 20:10:53,727 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 334.4ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:10:53,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-12 20:10:53,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 413. [2021-06-12 20:10:53,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.0728155339805827) internal successors, (1266), 412 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1266 transitions. [2021-06-12 20:10:53,735 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1266 transitions. Word has length 21 [2021-06-12 20:10:53,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:53,735 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1266 transitions. [2021-06-12 20:10:53,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:53,735 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1266 transitions. [2021-06-12 20:10:53,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:10:53,736 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:53,736 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:53,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-12 20:10:53,953 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:53,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:53,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1289968066, now seen corresponding path program 18 times [2021-06-12 20:10:53,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:53,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730075495] [2021-06-12 20:10:53,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:54,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:54,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730075495] [2021-06-12 20:10:54,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730075495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:54,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972331916] [2021-06-12 20:10:54,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:54,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:10:54,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:54,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:10:54,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:54,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972331916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:54,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:54,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-12 20:10:54,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706333283] [2021-06-12 20:10:54,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:10:54,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:54,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:10:54,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:10:54,257 INFO L87 Difference]: Start difference. First operand 413 states and 1266 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:54,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:54,661 INFO L93 Difference]: Finished difference Result 864 states and 2562 transitions. [2021-06-12 20:10:54,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:10:54,662 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:10:54,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:54,663 INFO L225 Difference]: With dead ends: 864 [2021-06-12 20:10:54,663 INFO L226 Difference]: Without dead ends: 812 [2021-06-12 20:10:54,664 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:10:54,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-12 20:10:54,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 458. [2021-06-12 20:10:54,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1684901531728666) internal successors, (1448), 457 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:54,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1448 transitions. [2021-06-12 20:10:54,673 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1448 transitions. Word has length 21 [2021-06-12 20:10:54,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:54,674 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1448 transitions. [2021-06-12 20:10:54,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:54,674 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1448 transitions. [2021-06-12 20:10:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:10:54,675 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:54,675 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:54,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:54,889 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:54,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:54,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1898744654, now seen corresponding path program 19 times [2021-06-12 20:10:54,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:54,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94331442] [2021-06-12 20:10:54,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:55,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:55,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94331442] [2021-06-12 20:10:55,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94331442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:55,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857570006] [2021-06-12 20:10:55,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:55,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:10:55,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:55,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857570006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:55,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:55,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-12 20:10:55,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830771571] [2021-06-12 20:10:55,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:10:55,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:55,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:10:55,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:10:55,405 INFO L87 Difference]: Start difference. First operand 458 states and 1448 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:55,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:55,945 INFO L93 Difference]: Finished difference Result 906 states and 2628 transitions. [2021-06-12 20:10:55,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:10:55,945 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:10:55,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:55,946 INFO L225 Difference]: With dead ends: 906 [2021-06-12 20:10:55,946 INFO L226 Difference]: Without dead ends: 837 [2021-06-12 20:10:55,947 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 610.1ms TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:10:55,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-06-12 20:10:55,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 464. [2021-06-12 20:10:55,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.1295896328293735) internal successors, (1449), 463 states have internal predecessors, (1449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:55,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1449 transitions. [2021-06-12 20:10:55,954 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1449 transitions. Word has length 21 [2021-06-12 20:10:55,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:55,954 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1449 transitions. [2021-06-12 20:10:55,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:55,955 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1449 transitions. [2021-06-12 20:10:55,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:10:55,956 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:55,956 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:56,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-12 20:10:56,169 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:56,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:56,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1066038364, now seen corresponding path program 20 times [2021-06-12 20:10:56,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:56,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352343077] [2021-06-12 20:10:56,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:56,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:56,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352343077] [2021-06-12 20:10:56,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352343077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:56,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728694025] [2021-06-12 20:10:56,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:56,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:10:56,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:56,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:10:56,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:56,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728694025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:56,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:56,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-12 20:10:56,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137251223] [2021-06-12 20:10:56,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:10:56,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:56,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:10:56,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:10:56,470 INFO L87 Difference]: Start difference. First operand 464 states and 1449 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:56,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:56,835 INFO L93 Difference]: Finished difference Result 795 states and 2331 transitions. [2021-06-12 20:10:56,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:10:56,835 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:10:56,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:56,836 INFO L225 Difference]: With dead ends: 795 [2021-06-12 20:10:56,836 INFO L226 Difference]: Without dead ends: 713 [2021-06-12 20:10:56,836 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 369.2ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:10:56,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-12 20:10:56,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 471. [2021-06-12 20:10:56,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.0914893617021275) internal successors, (1453), 470 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:56,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1453 transitions. [2021-06-12 20:10:56,844 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1453 transitions. Word has length 21 [2021-06-12 20:10:56,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:56,844 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1453 transitions. [2021-06-12 20:10:56,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:56,844 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1453 transitions. [2021-06-12 20:10:56,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:10:56,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:56,845 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:57,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-12 20:10:57,062 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:57,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:57,063 INFO L82 PathProgramCache]: Analyzing trace with hash 601158056, now seen corresponding path program 21 times [2021-06-12 20:10:57,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:57,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333640060] [2021-06-12 20:10:57,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:57,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:57,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333640060] [2021-06-12 20:10:57,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333640060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:57,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516522973] [2021-06-12 20:10:57,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:57,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:10:57,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:57,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:10:57,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:57,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516522973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:57,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:57,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-12 20:10:57,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142644441] [2021-06-12 20:10:57,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:10:57,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:57,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:10:57,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:10:57,369 INFO L87 Difference]: Start difference. First operand 471 states and 1453 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:57,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:57,752 INFO L93 Difference]: Finished difference Result 773 states and 2266 transitions. [2021-06-12 20:10:57,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:10:57,753 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:10:57,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:57,754 INFO L225 Difference]: With dead ends: 773 [2021-06-12 20:10:57,754 INFO L226 Difference]: Without dead ends: 672 [2021-06-12 20:10:57,754 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 400.4ms TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:10:57,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-12 20:10:57,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 462. [2021-06-12 20:10:57,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 3.0390455531453364) internal successors, (1401), 461 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:57,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1401 transitions. [2021-06-12 20:10:57,769 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1401 transitions. Word has length 21 [2021-06-12 20:10:57,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:57,769 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 1401 transitions. [2021-06-12 20:10:57,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:57,769 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1401 transitions. [2021-06-12 20:10:57,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:10:57,770 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:57,770 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:57,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable366,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:57,978 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:57,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:57,978 INFO L82 PathProgramCache]: Analyzing trace with hash 454395940, now seen corresponding path program 22 times [2021-06-12 20:10:57,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:57,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158780853] [2021-06-12 20:10:57,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:58,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:58,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158780853] [2021-06-12 20:10:58,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158780853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:58,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708461092] [2021-06-12 20:10:58,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:58,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:10:58,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:58,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:10:58,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:58,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708461092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:58,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:58,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-12 20:10:58,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092267521] [2021-06-12 20:10:58,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:10:58,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:58,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:10:58,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:10:58,364 INFO L87 Difference]: Start difference. First operand 462 states and 1401 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:58,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:58,576 INFO L93 Difference]: Finished difference Result 807 states and 2396 transitions. [2021-06-12 20:10:58,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:10:58,576 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:10:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:58,577 INFO L225 Difference]: With dead ends: 807 [2021-06-12 20:10:58,577 INFO L226 Difference]: Without dead ends: 755 [2021-06-12 20:10:58,578 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:10:58,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-06-12 20:10:58,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 506. [2021-06-12 20:10:58,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.130693069306931) internal successors, (1581), 505 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1581 transitions. [2021-06-12 20:10:58,587 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1581 transitions. Word has length 21 [2021-06-12 20:10:58,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:58,588 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1581 transitions. [2021-06-12 20:10:58,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:58,588 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1581 transitions. [2021-06-12 20:10:58,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:10:58,589 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:58,589 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:58,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-12 20:10:58,797 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:58,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:58,797 INFO L82 PathProgramCache]: Analyzing trace with hash -651858636, now seen corresponding path program 23 times [2021-06-12 20:10:58,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:58,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302133411] [2021-06-12 20:10:58,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:58,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:58,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302133411] [2021-06-12 20:10:58,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302133411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:58,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530945155] [2021-06-12 20:10:58,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:58,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:10:58,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:58,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:10:58,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:10:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:59,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530945155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:59,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:10:59,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-12 20:10:59,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578015232] [2021-06-12 20:10:59,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:10:59,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:10:59,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:10:59,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:10:59,091 INFO L87 Difference]: Start difference. First operand 506 states and 1581 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:59,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:10:59,462 INFO L93 Difference]: Finished difference Result 851 states and 2469 transitions. [2021-06-12 20:10:59,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:10:59,462 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:10:59,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:10:59,464 INFO L225 Difference]: With dead ends: 851 [2021-06-12 20:10:59,464 INFO L226 Difference]: Without dead ends: 782 [2021-06-12 20:10:59,464 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 337.6ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:10:59,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-06-12 20:10:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 491. [2021-06-12 20:10:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 3.0816326530612246) internal successors, (1510), 490 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1510 transitions. [2021-06-12 20:10:59,471 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1510 transitions. Word has length 21 [2021-06-12 20:10:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:10:59,471 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1510 transitions. [2021-06-12 20:10:59,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:10:59,471 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1510 transitions. [2021-06-12 20:10:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:10:59,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:10:59,472 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:10:59,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-12 20:10:59,677 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:10:59,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:10:59,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1484564926, now seen corresponding path program 24 times [2021-06-12 20:10:59,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:10:59,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608462546] [2021-06-12 20:10:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:10:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:10:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:10:59,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:10:59,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608462546] [2021-06-12 20:10:59,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608462546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:10:59,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644058439] [2021-06-12 20:10:59,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:10:59,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:10:59,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:10:59,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:10:59,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:00,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644058439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:00,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:00,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-12 20:11:00,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787809980] [2021-06-12 20:11:00,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:00,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:00,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:00,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:00,023 INFO L87 Difference]: Start difference. First operand 491 states and 1510 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:00,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:00,310 INFO L93 Difference]: Finished difference Result 682 states and 1999 transitions. [2021-06-12 20:11:00,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:11:00,310 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:00,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:00,311 INFO L225 Difference]: With dead ends: 682 [2021-06-12 20:11:00,312 INFO L226 Difference]: Without dead ends: 600 [2021-06-12 20:11:00,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:11:00,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-12 20:11:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 476. [2021-06-12 20:11:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 3.0442105263157893) internal successors, (1446), 475 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1446 transitions. [2021-06-12 20:11:00,318 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1446 transitions. Word has length 21 [2021-06-12 20:11:00,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:00,318 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1446 transitions. [2021-06-12 20:11:00,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:00,318 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1446 transitions. [2021-06-12 20:11:00,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:00,319 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:00,319 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:00,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-12 20:11:00,525 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:00,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:00,525 INFO L82 PathProgramCache]: Analyzing trace with hash -818537768, now seen corresponding path program 25 times [2021-06-12 20:11:00,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:00,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402861486] [2021-06-12 20:11:00,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:00,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:00,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402861486] [2021-06-12 20:11:00,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402861486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:00,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239089619] [2021-06-12 20:11:00,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:00,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:11:00,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:01,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239089619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:01,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:01,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-12 20:11:01,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794644545] [2021-06-12 20:11:01,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:11:01,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:01,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:11:01,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:11:01,002 INFO L87 Difference]: Start difference. First operand 476 states and 1446 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:01,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:01,227 INFO L93 Difference]: Finished difference Result 853 states and 2541 transitions. [2021-06-12 20:11:01,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:11:01,228 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:01,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:01,230 INFO L225 Difference]: With dead ends: 853 [2021-06-12 20:11:01,230 INFO L226 Difference]: Without dead ends: 801 [2021-06-12 20:11:01,230 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 314.2ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:11:01,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2021-06-12 20:11:01,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 514. [2021-06-12 20:11:01,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.142300194931774) internal successors, (1612), 513 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1612 transitions. [2021-06-12 20:11:01,248 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1612 transitions. Word has length 21 [2021-06-12 20:11:01,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:01,249 INFO L482 AbstractCegarLoop]: Abstraction has 514 states and 1612 transitions. [2021-06-12 20:11:01,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1612 transitions. [2021-06-12 20:11:01,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:01,250 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:01,250 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:01,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:01,461 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:01,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:01,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1924792344, now seen corresponding path program 26 times [2021-06-12 20:11:01,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:01,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429066754] [2021-06-12 20:11:01,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:01,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:01,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429066754] [2021-06-12 20:11:01,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429066754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:01,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787894554] [2021-06-12 20:11:01,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:01,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:11:01,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:01,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:11:01,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:01,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787894554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:01,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:01,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-12 20:11:01,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977533391] [2021-06-12 20:11:01,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:11:01,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:01,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:11:01,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:11:01,978 INFO L87 Difference]: Start difference. First operand 514 states and 1612 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:02,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:02,304 INFO L93 Difference]: Finished difference Result 772 states and 2308 transitions. [2021-06-12 20:11:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:11:02,305 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:02,306 INFO L225 Difference]: With dead ends: 772 [2021-06-12 20:11:02,306 INFO L226 Difference]: Without dead ends: 703 [2021-06-12 20:11:02,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 333.0ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:11:02,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-06-12 20:11:02,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 501. [2021-06-12 20:11:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 3.092) internal successors, (1546), 500 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:02,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1546 transitions. [2021-06-12 20:11:02,317 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1546 transitions. Word has length 21 [2021-06-12 20:11:02,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:02,325 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1546 transitions. [2021-06-12 20:11:02,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:02,325 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1546 transitions. [2021-06-12 20:11:02,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:02,326 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:02,326 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:02,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-12 20:11:02,549 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:02,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:02,549 INFO L82 PathProgramCache]: Analyzing trace with hash 941515172, now seen corresponding path program 27 times [2021-06-12 20:11:02,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:02,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570120017] [2021-06-12 20:11:02,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:02,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:02,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570120017] [2021-06-12 20:11:02,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570120017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:02,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126398966] [2021-06-12 20:11:02,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:02,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:11:02,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:02,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:11:02,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:02,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126398966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:02,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:02,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-06-12 20:11:02,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061288529] [2021-06-12 20:11:02,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:11:02,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:02,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:11:02,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:11:02,863 INFO L87 Difference]: Start difference. First operand 501 states and 1546 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:03,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:03,082 INFO L93 Difference]: Finished difference Result 688 states and 2059 transitions. [2021-06-12 20:11:03,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:11:03,082 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:03,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:03,084 INFO L225 Difference]: With dead ends: 688 [2021-06-12 20:11:03,084 INFO L226 Difference]: Without dead ends: 636 [2021-06-12 20:11:03,085 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 195.0ms TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:11:03,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-06-12 20:11:03,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 481. [2021-06-12 20:11:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.0625) internal successors, (1470), 480 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1470 transitions. [2021-06-12 20:11:03,093 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1470 transitions. Word has length 21 [2021-06-12 20:11:03,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:03,093 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1470 transitions. [2021-06-12 20:11:03,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:03,093 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1470 transitions. [2021-06-12 20:11:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:03,094 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:03,094 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:03,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:03,317 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:03,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:03,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1149829974, now seen corresponding path program 28 times [2021-06-12 20:11:03,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:03,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948323092] [2021-06-12 20:11:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:03,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:03,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948323092] [2021-06-12 20:11:03,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948323092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:03,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439987806] [2021-06-12 20:11:03,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:03,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:11:03,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:03,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:11:03,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:03,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:03,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:03,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:11:03,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:11:03,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2021-06-12 20:11:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:11:03,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439987806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:03,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:03,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-12 20:11:03,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541913089] [2021-06-12 20:11:03,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:03,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:03,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:03,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:03,832 INFO L87 Difference]: Start difference. First operand 481 states and 1470 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:04,808 INFO L93 Difference]: Finished difference Result 800 states and 2393 transitions. [2021-06-12 20:11:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:11:04,809 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:04,810 INFO L225 Difference]: With dead ends: 800 [2021-06-12 20:11:04,810 INFO L226 Difference]: Without dead ends: 713 [2021-06-12 20:11:04,811 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 877.0ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:11:04,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-12 20:11:04,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 466. [2021-06-12 20:11:04,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 3.0602150537634407) internal successors, (1423), 465 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:04,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1423 transitions. [2021-06-12 20:11:04,819 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1423 transitions. Word has length 21 [2021-06-12 20:11:04,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:04,819 INFO L482 AbstractCegarLoop]: Abstraction has 466 states and 1423 transitions. [2021-06-12 20:11:04,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:04,819 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1423 transitions. [2021-06-12 20:11:04,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:04,820 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:04,820 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:05,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2021-06-12 20:11:05,035 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:05,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:05,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1969646678, now seen corresponding path program 29 times [2021-06-12 20:11:05,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:05,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736714065] [2021-06-12 20:11:05,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:05,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:05,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736714065] [2021-06-12 20:11:05,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736714065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:05,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237844211] [2021-06-12 20:11:05,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:05,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:11:05,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:05,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:11:05,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:05,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:05,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:05,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:11:05,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:11:05,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2021-06-12 20:11:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:11:05,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237844211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:05,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:05,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-12 20:11:05,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140879090] [2021-06-12 20:11:05,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:11:05,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:05,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:11:05,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:11:05,556 INFO L87 Difference]: Start difference. First operand 466 states and 1423 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:05,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:05,777 INFO L93 Difference]: Finished difference Result 732 states and 2198 transitions. [2021-06-12 20:11:05,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:11:05,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:05,782 INFO L225 Difference]: With dead ends: 732 [2021-06-12 20:11:05,782 INFO L226 Difference]: Without dead ends: 680 [2021-06-12 20:11:05,782 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:11:05,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-12 20:11:05,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 480. [2021-06-12 20:11:05,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.1022964509394573) internal successors, (1486), 479 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:05,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1486 transitions. [2021-06-12 20:11:05,790 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1486 transitions. Word has length 21 [2021-06-12 20:11:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:05,791 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1486 transitions. [2021-06-12 20:11:05,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:05,791 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1486 transitions. [2021-06-12 20:11:05,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:05,791 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:05,792 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:06,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:06,015 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:06,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:06,015 INFO L82 PathProgramCache]: Analyzing trace with hash -356079944, now seen corresponding path program 30 times [2021-06-12 20:11:06,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:06,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013333577] [2021-06-12 20:11:06,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:06,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:06,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013333577] [2021-06-12 20:11:06,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013333577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:06,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997326325] [2021-06-12 20:11:06,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:06,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:11:06,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:06,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:11:06,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:06,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:06,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:06,238 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.0 percent of original size [2021-06-12 20:11:06,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:11:06,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:18 [2021-06-12 20:11:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:11:06,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997326325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:06,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:06,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:11:06,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014646894] [2021-06-12 20:11:06,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:11:06,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:06,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:11:06,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:11:06,400 INFO L87 Difference]: Start difference. First operand 480 states and 1486 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:06,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:06,540 INFO L93 Difference]: Finished difference Result 663 states and 1991 transitions. [2021-06-12 20:11:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:11:06,540 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:06,541 INFO L225 Difference]: With dead ends: 663 [2021-06-12 20:11:06,541 INFO L226 Difference]: Without dead ends: 606 [2021-06-12 20:11:06,542 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-12 20:11:06,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 446. [2021-06-12 20:11:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 3.0584269662921346) internal successors, (1361), 445 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1361 transitions. [2021-06-12 20:11:06,550 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1361 transitions. Word has length 21 [2021-06-12 20:11:06,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:06,550 INFO L482 AbstractCegarLoop]: Abstraction has 446 states and 1361 transitions. [2021-06-12 20:11:06,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:06,550 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1361 transitions. [2021-06-12 20:11:06,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:06,551 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:06,551 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:06,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-12 20:11:06,753 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:06,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:06,753 INFO L82 PathProgramCache]: Analyzing trace with hash 110824918, now seen corresponding path program 31 times [2021-06-12 20:11:06,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:06,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333324539] [2021-06-12 20:11:06,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:07,057 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-12 20:11:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:07,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:07,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333324539] [2021-06-12 20:11:07,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333324539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:07,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045665006] [2021-06-12 20:11:07,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:07,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:11:07,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:07,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:07,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:07,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:07,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:07,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:07,230 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:07,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:11:07,233 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:07,283 INFO L628 ElimStorePlain]: treesize reduction 40, result has 56.5 percent of original size [2021-06-12 20:11:07,283 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-12 20:11:07,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:11:07,284 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:107, output treesize:52 [2021-06-12 20:11:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:11:07,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045665006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:07,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:07,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:11:07,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193164265] [2021-06-12 20:11:07,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:11:07,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:07,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:11:07,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:11:07,429 INFO L87 Difference]: Start difference. First operand 446 states and 1361 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:07,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:07,712 INFO L93 Difference]: Finished difference Result 613 states and 1807 transitions. [2021-06-12 20:11:07,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:11:07,713 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:07,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:07,714 INFO L225 Difference]: With dead ends: 613 [2021-06-12 20:11:07,714 INFO L226 Difference]: Without dead ends: 561 [2021-06-12 20:11:07,714 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 591.1ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:11:07,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-12 20:11:07,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 431. [2021-06-12 20:11:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.041860465116279) internal successors, (1308), 430 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1308 transitions. [2021-06-12 20:11:07,722 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1308 transitions. Word has length 21 [2021-06-12 20:11:07,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:07,722 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 1308 transitions. [2021-06-12 20:11:07,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:07,722 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1308 transitions. [2021-06-12 20:11:07,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:07,723 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:07,723 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:07,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-06-12 20:11:07,946 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:07,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1724391652, now seen corresponding path program 32 times [2021-06-12 20:11:07,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:07,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768978939] [2021-06-12 20:11:07,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:08,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:08,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768978939] [2021-06-12 20:11:08,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768978939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:08,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527713703] [2021-06-12 20:11:08,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:08,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:11:08,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:08,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:11:08,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:08,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:11:08,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527713703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:08,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:08,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-12 20:11:08,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55538589] [2021-06-12 20:11:08,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:08,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:08,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:08,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:08,458 INFO L87 Difference]: Start difference. First operand 431 states and 1308 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:09,285 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-06-12 20:11:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:09,729 INFO L93 Difference]: Finished difference Result 819 states and 2339 transitions. [2021-06-12 20:11:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:11:09,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:09,731 INFO L225 Difference]: With dead ends: 819 [2021-06-12 20:11:09,731 INFO L226 Difference]: Without dead ends: 715 [2021-06-12 20:11:09,731 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1231.3ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:11:09,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-06-12 20:11:09,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 427. [2021-06-12 20:11:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.0) internal successors, (1278), 426 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:09,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1278 transitions. [2021-06-12 20:11:09,740 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1278 transitions. Word has length 21 [2021-06-12 20:11:09,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:09,740 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1278 transitions. [2021-06-12 20:11:09,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:09,740 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1278 transitions. [2021-06-12 20:11:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:09,741 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:09,741 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:09,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:09,965 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:09,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:09,965 INFO L82 PathProgramCache]: Analyzing trace with hash -214051430, now seen corresponding path program 33 times [2021-06-12 20:11:09,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:09,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401630290] [2021-06-12 20:11:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:10,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:10,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:10,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401630290] [2021-06-12 20:11:10,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401630290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:10,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398080033] [2021-06-12 20:11:10,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:10,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:11:10,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:10,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:11:10,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:10,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:11:10,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:10,265 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.1 percent of original size [2021-06-12 20:11:10,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:10,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:10,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:11:10,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:10,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:11:10,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:10,307 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:10,352 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.4 percent of original size [2021-06-12 20:11:10,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:11:10,353 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:107, output treesize:49 [2021-06-12 20:11:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:10,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398080033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:10,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:10,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:11:10,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605603015] [2021-06-12 20:11:10,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:11:10,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:10,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:11:10,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:11:10,501 INFO L87 Difference]: Start difference. First operand 427 states and 1278 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:10,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:10,863 INFO L93 Difference]: Finished difference Result 542 states and 1584 transitions. [2021-06-12 20:11:10,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:11:10,863 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:10,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:10,864 INFO L225 Difference]: With dead ends: 542 [2021-06-12 20:11:10,865 INFO L226 Difference]: Without dead ends: 465 [2021-06-12 20:11:10,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 351.6ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:11:10,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-12 20:11:10,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 385. [2021-06-12 20:11:10,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 3.0) internal successors, (1152), 384 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1152 transitions. [2021-06-12 20:11:10,872 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1152 transitions. Word has length 21 [2021-06-12 20:11:10,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:10,872 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1152 transitions. [2021-06-12 20:11:10,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:10,872 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1152 transitions. [2021-06-12 20:11:10,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:10,873 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:10,873 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:11,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-12 20:11:11,087 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:11,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:11,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1805824578, now seen corresponding path program 34 times [2021-06-12 20:11:11,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:11,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991520286] [2021-06-12 20:11:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:11:11,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:11,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991520286] [2021-06-12 20:11:11,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991520286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:11,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234470314] [2021-06-12 20:11:11,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:11,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:11:11,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:11,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:11:11,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:11,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:11,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234470314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:11,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:11,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 20:11:11,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550854620] [2021-06-12 20:11:11,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:11:11,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:11,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:11:11,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:11:11,496 INFO L87 Difference]: Start difference. First operand 385 states and 1152 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:12,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:12,947 INFO L93 Difference]: Finished difference Result 1027 states and 2935 transitions. [2021-06-12 20:11:12,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:11:12,948 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:12,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:12,949 INFO L225 Difference]: With dead ends: 1027 [2021-06-12 20:11:12,950 INFO L226 Difference]: Without dead ends: 876 [2021-06-12 20:11:12,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1117.0ms TimeCoverageRelationStatistics Valid=291, Invalid=1191, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:11:12,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-06-12 20:11:12,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 395. [2021-06-12 20:11:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.0076142131979697) internal successors, (1185), 394 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:12,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1185 transitions. [2021-06-12 20:11:12,959 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1185 transitions. Word has length 21 [2021-06-12 20:11:12,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:12,959 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1185 transitions. [2021-06-12 20:11:12,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:12,960 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1185 transitions. [2021-06-12 20:11:12,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:12,960 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:12,961 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:13,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:13,177 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:13,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:13,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1761625290, now seen corresponding path program 35 times [2021-06-12 20:11:13,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:13,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655902999] [2021-06-12 20:11:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:13,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:13,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:13,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655902999] [2021-06-12 20:11:13,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655902999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:13,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124526333] [2021-06-12 20:11:13,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:13,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:11:13,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:13,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:11:13,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:13,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124526333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:13,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:13,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-12 20:11:13,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469350627] [2021-06-12 20:11:13,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:13,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:13,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:13,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:13,582 INFO L87 Difference]: Start difference. First operand 395 states and 1185 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:14,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:14,062 INFO L93 Difference]: Finished difference Result 561 states and 1670 transitions. [2021-06-12 20:11:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:11:14,062 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:14,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:14,064 INFO L225 Difference]: With dead ends: 561 [2021-06-12 20:11:14,064 INFO L226 Difference]: Without dead ends: 509 [2021-06-12 20:11:14,064 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 455.5ms TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:11:14,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-12 20:11:14,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 404. [2021-06-12 20:11:14,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.0124069478908186) internal successors, (1214), 403 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:14,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1214 transitions. [2021-06-12 20:11:14,087 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1214 transitions. Word has length 21 [2021-06-12 20:11:14,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:14,087 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1214 transitions. [2021-06-12 20:11:14,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:14,087 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1214 transitions. [2021-06-12 20:11:14,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:14,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:14,088 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:14,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-06-12 20:11:14,311 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:14,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:14,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1539064924, now seen corresponding path program 36 times [2021-06-12 20:11:14,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:14,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209869800] [2021-06-12 20:11:14,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:14,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:14,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209869800] [2021-06-12 20:11:14,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209869800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:14,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293405359] [2021-06-12 20:11:14,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:14,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:11:14,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:14,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:11:14,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:14,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293405359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:14,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:14,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-12 20:11:14,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210219369] [2021-06-12 20:11:14,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:14,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:14,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:14,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:14,648 INFO L87 Difference]: Start difference. First operand 404 states and 1214 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:15,037 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2021-06-12 20:11:15,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:15,065 INFO L93 Difference]: Finished difference Result 648 states and 1890 transitions. [2021-06-12 20:11:15,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:11:15,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:15,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:15,066 INFO L225 Difference]: With dead ends: 648 [2021-06-12 20:11:15,066 INFO L226 Difference]: Without dead ends: 579 [2021-06-12 20:11:15,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:11:15,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-12 20:11:15,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 433. [2021-06-12 20:11:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.0300925925925926) internal successors, (1309), 432 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1309 transitions. [2021-06-12 20:11:15,072 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1309 transitions. Word has length 21 [2021-06-12 20:11:15,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:15,072 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1309 transitions. [2021-06-12 20:11:15,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:15,072 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1309 transitions. [2021-06-12 20:11:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:15,073 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:15,073 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:15,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:15,296 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:15,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:15,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1609295264, now seen corresponding path program 37 times [2021-06-12 20:11:15,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:15,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350033508] [2021-06-12 20:11:15,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:15,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:15,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350033508] [2021-06-12 20:11:15,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350033508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:15,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25823749] [2021-06-12 20:11:15,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:15,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:11:15,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:15,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25823749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:15,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:15,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-12 20:11:15,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903999516] [2021-06-12 20:11:15,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:11:15,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:15,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:11:15,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:11:15,697 INFO L87 Difference]: Start difference. First operand 433 states and 1309 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:16,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:16,018 INFO L93 Difference]: Finished difference Result 583 states and 1717 transitions. [2021-06-12 20:11:16,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:11:16,019 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:16,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:16,020 INFO L225 Difference]: With dead ends: 583 [2021-06-12 20:11:16,020 INFO L226 Difference]: Without dead ends: 531 [2021-06-12 20:11:16,020 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:11:16,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-12 20:11:16,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 395. [2021-06-12 20:11:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 3.0076142131979697) internal successors, (1185), 394 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:16,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1185 transitions. [2021-06-12 20:11:16,027 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1185 transitions. Word has length 21 [2021-06-12 20:11:16,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:16,027 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1185 transitions. [2021-06-12 20:11:16,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:16,027 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1185 transitions. [2021-06-12 20:11:16,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:16,028 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:16,028 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:16,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-12 20:11:16,252 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:16,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:16,252 INFO L82 PathProgramCache]: Analyzing trace with hash 927641802, now seen corresponding path program 38 times [2021-06-12 20:11:16,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:16,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50695121] [2021-06-12 20:11:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:11:16,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:16,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50695121] [2021-06-12 20:11:16,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50695121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:16,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418358458] [2021-06-12 20:11:16,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:16,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:11:16,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:16,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:11:16,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:11:16,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418358458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:16,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:16,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 20:11:16,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331914093] [2021-06-12 20:11:16,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:11:16,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:16,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:11:16,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:11:16,631 INFO L87 Difference]: Start difference. First operand 395 states and 1185 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:17,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:17,496 INFO L93 Difference]: Finished difference Result 659 states and 1867 transitions. [2021-06-12 20:11:17,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:11:17,497 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:17,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:17,498 INFO L225 Difference]: With dead ends: 659 [2021-06-12 20:11:17,498 INFO L226 Difference]: Without dead ends: 508 [2021-06-12 20:11:17,498 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 706.4ms TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:11:17,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-12 20:11:17,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 388. [2021-06-12 20:11:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.992248062015504) internal successors, (1158), 387 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:17,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1158 transitions. [2021-06-12 20:11:17,505 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1158 transitions. Word has length 21 [2021-06-12 20:11:17,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:17,505 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1158 transitions. [2021-06-12 20:11:17,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1158 transitions. [2021-06-12 20:11:17,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:17,506 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:17,507 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:17,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-12 20:11:17,729 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:17,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:17,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1063950666, now seen corresponding path program 39 times [2021-06-12 20:11:17,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:17,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166344961] [2021-06-12 20:11:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:11:17,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:17,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166344961] [2021-06-12 20:11:17,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166344961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:17,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494728690] [2021-06-12 20:11:17,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:17,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:11:17,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:17,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:11:17,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:18,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494728690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:18,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:18,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 20:11:18,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460501166] [2021-06-12 20:11:18,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:11:18,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:18,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:11:18,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:11:18,091 INFO L87 Difference]: Start difference. First operand 388 states and 1158 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:19,531 INFO L93 Difference]: Finished difference Result 733 states and 2120 transitions. [2021-06-12 20:11:19,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:11:19,532 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:19,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:19,533 INFO L225 Difference]: With dead ends: 733 [2021-06-12 20:11:19,533 INFO L226 Difference]: Without dead ends: 590 [2021-06-12 20:11:19,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1174.4ms TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:11:19,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-06-12 20:11:19,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 370. [2021-06-12 20:11:19,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.97289972899729) internal successors, (1097), 369 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1097 transitions. [2021-06-12 20:11:19,539 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1097 transitions. Word has length 21 [2021-06-12 20:11:19,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:19,539 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1097 transitions. [2021-06-12 20:11:19,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:19,539 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1097 transitions. [2021-06-12 20:11:19,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:19,540 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:19,540 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:19,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:19,741 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:19,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:19,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1824010934, now seen corresponding path program 40 times [2021-06-12 20:11:19,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:19,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932745231] [2021-06-12 20:11:19,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:11:19,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:19,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932745231] [2021-06-12 20:11:19,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932745231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:19,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59563196] [2021-06-12 20:11:19,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:19,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:11:19,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:19,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:11:19,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:20,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59563196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:20,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:20,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 20:11:20,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684904157] [2021-06-12 20:11:20,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:11:20,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:20,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:11:20,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:11:20,051 INFO L87 Difference]: Start difference. First operand 370 states and 1097 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:21,038 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-06-12 20:11:21,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:21,441 INFO L93 Difference]: Finished difference Result 858 states and 2494 transitions. [2021-06-12 20:11:21,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:11:21,441 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:21,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:21,442 INFO L225 Difference]: With dead ends: 858 [2021-06-12 20:11:21,442 INFO L226 Difference]: Without dead ends: 761 [2021-06-12 20:11:21,443 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1084.9ms TimeCoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:11:21,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-06-12 20:11:21,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 390. [2021-06-12 20:11:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.025706940874036) internal successors, (1177), 389 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:21,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1177 transitions. [2021-06-12 20:11:21,450 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1177 transitions. Word has length 21 [2021-06-12 20:11:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:21,450 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1177 transitions. [2021-06-12 20:11:21,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:21,450 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1177 transitions. [2021-06-12 20:11:21,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:21,451 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:21,451 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:21,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:21,665 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:21,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:21,665 INFO L82 PathProgramCache]: Analyzing trace with hash -223501882, now seen corresponding path program 41 times [2021-06-12 20:11:21,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:21,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603659273] [2021-06-12 20:11:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:11:21,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:21,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603659273] [2021-06-12 20:11:21,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603659273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:21,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671906456] [2021-06-12 20:11:21,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:21,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:11:21,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:21,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:11:21,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:22,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:22,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671906456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:22,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:22,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 20:11:22,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300899213] [2021-06-12 20:11:22,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:11:22,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:22,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:11:22,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:11:22,038 INFO L87 Difference]: Start difference. First operand 390 states and 1177 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:23,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:23,198 INFO L93 Difference]: Finished difference Result 851 states and 2515 transitions. [2021-06-12 20:11:23,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:11:23,199 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:23,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:23,200 INFO L225 Difference]: With dead ends: 851 [2021-06-12 20:11:23,200 INFO L226 Difference]: Without dead ends: 742 [2021-06-12 20:11:23,200 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 965.6ms TimeCoverageRelationStatistics Valid=273, Invalid=1133, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:11:23,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-12 20:11:23,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 400. [2021-06-12 20:11:23,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.0526315789473686) internal successors, (1218), 399 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:23,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1218 transitions. [2021-06-12 20:11:23,208 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1218 transitions. Word has length 21 [2021-06-12 20:11:23,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:23,208 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1218 transitions. [2021-06-12 20:11:23,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:23,208 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1218 transitions. [2021-06-12 20:11:23,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:23,209 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:23,209 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:23,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-12 20:11:23,429 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:23,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:23,429 INFO L82 PathProgramCache]: Analyzing trace with hash 59224522, now seen corresponding path program 42 times [2021-06-12 20:11:23,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:23,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49807251] [2021-06-12 20:11:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:11:23,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:23,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49807251] [2021-06-12 20:11:23,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49807251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:23,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799689448] [2021-06-12 20:11:23,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:23,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:11:23,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:23,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:11:23,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:23,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799689448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:23,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:23,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 20:11:23,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242452918] [2021-06-12 20:11:23,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:11:23,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:23,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:11:23,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:11:23,750 INFO L87 Difference]: Start difference. First operand 400 states and 1218 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:24,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:24,626 INFO L93 Difference]: Finished difference Result 777 states and 2233 transitions. [2021-06-12 20:11:24,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:11:24,627 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:24,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:24,628 INFO L225 Difference]: With dead ends: 777 [2021-06-12 20:11:24,628 INFO L226 Difference]: Without dead ends: 676 [2021-06-12 20:11:24,628 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 716.2ms TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:11:24,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-12 20:11:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 385. [2021-06-12 20:11:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.9817708333333335) internal successors, (1145), 384 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:24,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1145 transitions. [2021-06-12 20:11:24,639 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1145 transitions. Word has length 21 [2021-06-12 20:11:24,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:24,639 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1145 transitions. [2021-06-12 20:11:24,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:24,639 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1145 transitions. [2021-06-12 20:11:24,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:11:24,640 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:24,640 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:24,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:24,853 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:24,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:24,853 INFO L82 PathProgramCache]: Analyzing trace with hash -191892094, now seen corresponding path program 43 times [2021-06-12 20:11:24,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:24,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547729429] [2021-06-12 20:11:24,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:11:24,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:24,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547729429] [2021-06-12 20:11:24,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547729429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:24,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619523801] [2021-06-12 20:11:24,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:25,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:11:25,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:11:25,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619523801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:25,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:25,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 20:11:25,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599791029] [2021-06-12 20:11:25,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:11:25,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:25,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:11:25,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:11:25,386 INFO L87 Difference]: Start difference. First operand 385 states and 1145 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:26,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:26,166 INFO L93 Difference]: Finished difference Result 528 states and 1542 transitions. [2021-06-12 20:11:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:11:26,166 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:11:26,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:26,167 INFO L225 Difference]: With dead ends: 528 [2021-06-12 20:11:26,167 INFO L226 Difference]: Without dead ends: 482 [2021-06-12 20:11:26,167 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 622.8ms TimeCoverageRelationStatistics Valid=208, Invalid=848, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:11:26,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-12 20:11:26,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 304. [2021-06-12 20:11:26,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.953795379537954) internal successors, (895), 303 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:26,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 895 transitions. [2021-06-12 20:11:26,173 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 895 transitions. Word has length 21 [2021-06-12 20:11:26,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:26,173 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 895 transitions. [2021-06-12 20:11:26,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:26,173 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 895 transitions. [2021-06-12 20:11:26,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:26,174 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:26,174 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:26,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:26,389 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:26,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:26,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1148844402, now seen corresponding path program 44 times [2021-06-12 20:11:26,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:26,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181867794] [2021-06-12 20:11:26,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:11:26,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:26,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181867794] [2021-06-12 20:11:26,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181867794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:26,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213548245] [2021-06-12 20:11:26,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:26,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:11:26,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:26,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:26,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:26,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213548245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:26,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:26,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 20:11:26,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081412568] [2021-06-12 20:11:26,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:26,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:26,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:26,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:26,787 INFO L87 Difference]: Start difference. First operand 304 states and 895 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:27,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:27,552 INFO L93 Difference]: Finished difference Result 791 states and 2249 transitions. [2021-06-12 20:11:27,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:11:27,553 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:27,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:27,554 INFO L225 Difference]: With dead ends: 791 [2021-06-12 20:11:27,554 INFO L226 Difference]: Without dead ends: 673 [2021-06-12 20:11:27,554 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 801.1ms TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:11:27,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-06-12 20:11:27,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 311. [2021-06-12 20:11:27,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.97741935483871) internal successors, (923), 310 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:27,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 923 transitions. [2021-06-12 20:11:27,562 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 923 transitions. Word has length 22 [2021-06-12 20:11:27,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:27,562 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 923 transitions. [2021-06-12 20:11:27,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:27,563 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 923 transitions. [2021-06-12 20:11:27,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:27,563 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:27,563 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:27,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-12 20:11:27,785 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:27,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:27,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1439910460, now seen corresponding path program 45 times [2021-06-12 20:11:27,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:27,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811003266] [2021-06-12 20:11:27,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:27,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:11:27,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:27,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811003266] [2021-06-12 20:11:27,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811003266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:27,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426911457] [2021-06-12 20:11:27,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:27,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:11:27,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:27,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:11:27,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:11:28,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426911457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:28,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:28,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:11:28,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925583716] [2021-06-12 20:11:28,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:11:28,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:28,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:11:28,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:11:28,153 INFO L87 Difference]: Start difference. First operand 311 states and 923 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:28,392 INFO L93 Difference]: Finished difference Result 694 states and 1967 transitions. [2021-06-12 20:11:28,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:11:28,392 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:28,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:28,393 INFO L225 Difference]: With dead ends: 694 [2021-06-12 20:11:28,393 INFO L226 Difference]: Without dead ends: 607 [2021-06-12 20:11:28,393 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:11:28,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-12 20:11:28,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 302. [2021-06-12 20:11:28,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.956810631229236) internal successors, (890), 301 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 890 transitions. [2021-06-12 20:11:28,398 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 890 transitions. Word has length 22 [2021-06-12 20:11:28,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:28,398 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 890 transitions. [2021-06-12 20:11:28,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:28,398 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 890 transitions. [2021-06-12 20:11:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:28,399 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:28,399 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:28,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:28,613 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:28,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:28,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1043150932, now seen corresponding path program 46 times [2021-06-12 20:11:28,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:28,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771248515] [2021-06-12 20:11:28,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:28,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:28,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771248515] [2021-06-12 20:11:28,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771248515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:28,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735242913] [2021-06-12 20:11:28,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:28,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:11:28,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:28,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:28,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:28,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735242913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:28,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:28,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 20:11:28,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934071593] [2021-06-12 20:11:28,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:28,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:28,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:28,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:28,987 INFO L87 Difference]: Start difference. First operand 302 states and 890 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:29,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:29,806 INFO L93 Difference]: Finished difference Result 620 states and 1775 transitions. [2021-06-12 20:11:29,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:11:29,806 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:29,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:29,807 INFO L225 Difference]: With dead ends: 620 [2021-06-12 20:11:29,807 INFO L226 Difference]: Without dead ends: 510 [2021-06-12 20:11:29,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 838.7ms TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:11:29,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-12 20:11:29,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 269. [2021-06-12 20:11:29,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.966417910447761) internal successors, (795), 268 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:29,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 795 transitions. [2021-06-12 20:11:29,811 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 795 transitions. Word has length 22 [2021-06-12 20:11:29,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:29,811 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 795 transitions. [2021-06-12 20:11:29,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:29,811 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 795 transitions. [2021-06-12 20:11:29,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:29,811 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:29,811 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:30,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable630,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:30,017 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:30,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:30,017 INFO L82 PathProgramCache]: Analyzing trace with hash 942011964, now seen corresponding path program 47 times [2021-06-12 20:11:30,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:30,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176493344] [2021-06-12 20:11:30,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:11:30,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:30,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176493344] [2021-06-12 20:11:30,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176493344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:30,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345424126] [2021-06-12 20:11:30,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:30,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:11:30,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:30,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:30,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:30,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345424126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:30,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:30,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-12 20:11:30,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399387489] [2021-06-12 20:11:30,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:11:30,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:30,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:11:30,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:11:30,410 INFO L87 Difference]: Start difference. First operand 269 states and 795 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:30,760 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-06-12 20:11:31,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:31,872 INFO L93 Difference]: Finished difference Result 887 states and 2504 transitions. [2021-06-12 20:11:31,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:11:31,873 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:31,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:31,873 INFO L225 Difference]: With dead ends: 887 [2021-06-12 20:11:31,873 INFO L226 Difference]: Without dead ends: 635 [2021-06-12 20:11:31,874 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1442.9ms TimeCoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:11:31,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-06-12 20:11:31,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 269. [2021-06-12 20:11:31,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.9365671641791047) internal successors, (787), 268 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 787 transitions. [2021-06-12 20:11:31,878 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 787 transitions. Word has length 22 [2021-06-12 20:11:31,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:31,878 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 787 transitions. [2021-06-12 20:11:31,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:31,878 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 787 transitions. [2021-06-12 20:11:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:31,879 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:31,879 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:32,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:32,081 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:32,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:32,081 INFO L82 PathProgramCache]: Analyzing trace with hash 746481008, now seen corresponding path program 48 times [2021-06-12 20:11:32,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:32,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020141853] [2021-06-12 20:11:32,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:32,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:32,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020141853] [2021-06-12 20:11:32,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020141853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:32,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867658397] [2021-06-12 20:11:32,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:32,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:11:32,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:32,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:32,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:32,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:11:32,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:32,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:11:32,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:11:32,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:32,554 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-12 20:11:32,554 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-06-12 20:11:32,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:11:32,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:32,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:11:32,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:32,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:32,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:32,628 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:32,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:11:32,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:32,689 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:32,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:32,699 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:32,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:11:32,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-12 20:11:32,757 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-12 20:11:33,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:11:33,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:11:33,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:11:33,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:33,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:11:33,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:33,065 INFO L628 ElimStorePlain]: treesize reduction 20, result has 61.5 percent of original size [2021-06-12 20:11:33,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:11:33,068 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:33,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:11:33,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:11:33,082 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-12 20:11:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:33,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867658397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:33,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:33,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:11:33,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154771996] [2021-06-12 20:11:33,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:11:33,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:33,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:11:33,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:11:33,132 INFO L87 Difference]: Start difference. First operand 269 states and 787 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:33,908 INFO L93 Difference]: Finished difference Result 639 states and 1819 transitions. [2021-06-12 20:11:33,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:11:33,908 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:33,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:33,909 INFO L225 Difference]: With dead ends: 639 [2021-06-12 20:11:33,909 INFO L226 Difference]: Without dead ends: 521 [2021-06-12 20:11:33,909 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 868.1ms TimeCoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:11:33,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-12 20:11:33,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 290. [2021-06-12 20:11:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.98961937716263) internal successors, (864), 289 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:33,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 864 transitions. [2021-06-12 20:11:33,913 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 864 transitions. Word has length 22 [2021-06-12 20:11:33,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:33,913 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 864 transitions. [2021-06-12 20:11:33,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:33,913 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 864 transitions. [2021-06-12 20:11:33,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:33,914 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:33,914 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:34,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-06-12 20:11:34,114 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:34,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:34,115 INFO L82 PathProgramCache]: Analyzing trace with hash -959731426, now seen corresponding path program 49 times [2021-06-12 20:11:34,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:34,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040818601] [2021-06-12 20:11:34,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:34,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:34,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040818601] [2021-06-12 20:11:34,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040818601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:34,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304153052] [2021-06-12 20:11:34,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:34,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:34,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:34,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:11:34,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:11:34,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:11:34,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:34,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:11:34,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:34,682 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-12 20:11:34,682 INFO L628 ElimStorePlain]: treesize reduction 36, result has 78.7 percent of original size [2021-06-12 20:11:34,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:34,687 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:34,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:34,691 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:34,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:11:34,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:34,756 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:34,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:34,761 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:34,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:11:34,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:11:34,831 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:34,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:11:34,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-12 20:11:34,890 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-12 20:11:35,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:35,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:35,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:11:35,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:11:35,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:35,235 INFO L628 ElimStorePlain]: treesize reduction 78, result has 46.2 percent of original size [2021-06-12 20:11:35,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:11:35,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:35,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:11:35,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:11:35,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:35,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:11:35,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:35,303 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:35,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:11:35,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:11:35,331 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:157, output treesize:25 [2021-06-12 20:11:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:35,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304153052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:35,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:35,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:11:35,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591504048] [2021-06-12 20:11:35,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:11:35,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:35,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:11:35,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:11:35,408 INFO L87 Difference]: Start difference. First operand 290 states and 864 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:35,977 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-12 20:11:36,229 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-06-12 20:11:36,890 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-12 20:11:37,247 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-06-12 20:11:37,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:37,874 INFO L93 Difference]: Finished difference Result 703 states and 1960 transitions. [2021-06-12 20:11:37,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:11:37,875 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:37,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:37,875 INFO L225 Difference]: With dead ends: 703 [2021-06-12 20:11:37,875 INFO L226 Difference]: Without dead ends: 541 [2021-06-12 20:11:37,875 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2222.6ms TimeCoverageRelationStatistics Valid=288, Invalid=972, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:11:37,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-06-12 20:11:37,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 283. [2021-06-12 20:11:37,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.9645390070921986) internal successors, (836), 282 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:37,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 836 transitions. [2021-06-12 20:11:37,879 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 836 transitions. Word has length 22 [2021-06-12 20:11:37,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:37,879 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 836 transitions. [2021-06-12 20:11:37,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:37,879 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 836 transitions. [2021-06-12 20:11:37,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:37,880 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:37,880 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:38,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-12 20:11:38,081 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:38,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:38,081 INFO L82 PathProgramCache]: Analyzing trace with hash 205767280, now seen corresponding path program 50 times [2021-06-12 20:11:38,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:38,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275933873] [2021-06-12 20:11:38,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:38,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:38,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275933873] [2021-06-12 20:11:38,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275933873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:38,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373855521] [2021-06-12 20:11:38,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:38,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:11:38,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:38,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:38,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:38,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:38,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:38,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:11:38,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:11:38,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:38,763 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-12 20:11:38,764 INFO L628 ElimStorePlain]: treesize reduction 32, result has 79.7 percent of original size [2021-06-12 20:11:38,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:11:38,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:38,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:11:38,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-12 20:11:38,848 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:170, output treesize:120 [2021-06-12 20:11:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:39,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373855521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:39,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:39,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:11:39,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233238342] [2021-06-12 20:11:39,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:11:39,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:39,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:11:39,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:11:39,119 INFO L87 Difference]: Start difference. First operand 283 states and 836 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:39,679 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2021-06-12 20:11:40,019 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-06-12 20:11:40,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:40,288 INFO L93 Difference]: Finished difference Result 463 states and 1318 transitions. [2021-06-12 20:11:40,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:11:40,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:40,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:40,289 INFO L225 Difference]: With dead ends: 463 [2021-06-12 20:11:40,289 INFO L226 Difference]: Without dead ends: 323 [2021-06-12 20:11:40,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1297.5ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:11:40,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-12 20:11:40,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 276. [2021-06-12 20:11:40,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.938181818181818) internal successors, (808), 275 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:40,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 808 transitions. [2021-06-12 20:11:40,292 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 808 transitions. Word has length 22 [2021-06-12 20:11:40,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:40,292 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 808 transitions. [2021-06-12 20:11:40,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:40,292 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 808 transitions. [2021-06-12 20:11:40,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:40,292 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:40,293 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:40,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable712 [2021-06-12 20:11:40,505 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:40,505 INFO L82 PathProgramCache]: Analyzing trace with hash -388078088, now seen corresponding path program 51 times [2021-06-12 20:11:40,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:40,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542073876] [2021-06-12 20:11:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:40,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:40,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542073876] [2021-06-12 20:11:40,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542073876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:40,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369877944] [2021-06-12 20:11:40,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:40,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:11:40,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:40,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:40,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:40,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:11:40,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:11:40,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:11:40,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:40,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:11:40,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:11:40,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:11:40,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:40,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:11:40,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:40,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:40,886 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:40,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:40,890 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:40,892 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:11:40,893 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:40,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:11:40,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:11:40,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:11:40,898 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:40,900 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:11:40,901 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:40,976 INFO L628 ElimStorePlain]: treesize reduction 23, result has 76.3 percent of original size [2021-06-12 20:11:40,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:11:40,979 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:199, output treesize:66 [2021-06-12 20:11:41,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:41,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:41,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:11:41,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:11:41,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:41,227 INFO L628 ElimStorePlain]: treesize reduction 35, result has 47.8 percent of original size [2021-06-12 20:11:41,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:11:41,230 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:41,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:11:41,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:11:41,244 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-12 20:11:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:41,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369877944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:41,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:41,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:11:41,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875083466] [2021-06-12 20:11:41,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:11:41,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:41,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:11:41,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:11:41,289 INFO L87 Difference]: Start difference. First operand 276 states and 808 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:41,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:41,938 INFO L93 Difference]: Finished difference Result 730 states and 2080 transitions. [2021-06-12 20:11:41,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:11:41,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:41,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:41,939 INFO L225 Difference]: With dead ends: 730 [2021-06-12 20:11:41,940 INFO L226 Difference]: Without dead ends: 612 [2021-06-12 20:11:41,940 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 669.2ms TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:11:41,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-12 20:11:41,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 304. [2021-06-12 20:11:41,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.036303630363036) internal successors, (920), 303 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 920 transitions. [2021-06-12 20:11:41,945 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 920 transitions. Word has length 22 [2021-06-12 20:11:41,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:41,946 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 920 transitions. [2021-06-12 20:11:41,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:41,946 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 920 transitions. [2021-06-12 20:11:41,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:41,946 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:41,946 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:42,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable740 [2021-06-12 20:11:42,149 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:42,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:42,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2094290522, now seen corresponding path program 52 times [2021-06-12 20:11:42,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:42,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008226544] [2021-06-12 20:11:42,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:42,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:42,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008226544] [2021-06-12 20:11:42,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008226544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:42,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761927363] [2021-06-12 20:11:42,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:42,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:11:42,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:42,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:42,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:42,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:11:42,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:11:42,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:11:42,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:42,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:11:42,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:42,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:42,460 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:42,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:11:42,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:11:42,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:42,528 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.6 percent of original size [2021-06-12 20:11:42,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-06-12 20:11:42,530 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:132, output treesize:66 [2021-06-12 20:11:42,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:42,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:42,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:11:42,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:11:42,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:42,773 INFO L628 ElimStorePlain]: treesize reduction 57, result has 49.1 percent of original size [2021-06-12 20:11:42,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:11:42,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:42,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:11:42,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:11:42,809 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:11:42,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:11:42,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:11:42,831 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:24 [2021-06-12 20:11:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:42,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761927363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:42,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:42,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:11:42,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650668318] [2021-06-12 20:11:42,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:11:42,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:42,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:11:42,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:11:42,904 INFO L87 Difference]: Start difference. First operand 304 states and 920 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:43,495 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-06-12 20:11:44,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:44,646 INFO L93 Difference]: Finished difference Result 858 states and 2428 transitions. [2021-06-12 20:11:44,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:11:44,646 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:44,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:44,647 INFO L225 Difference]: With dead ends: 858 [2021-06-12 20:11:44,647 INFO L226 Difference]: Without dead ends: 643 [2021-06-12 20:11:44,647 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1637.5ms TimeCoverageRelationStatistics Valid=284, Invalid=838, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:11:44,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-12 20:11:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 317. [2021-06-12 20:11:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.990506329113924) internal successors, (945), 316 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 945 transitions. [2021-06-12 20:11:44,651 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 945 transitions. Word has length 22 [2021-06-12 20:11:44,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:44,651 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 945 transitions. [2021-06-12 20:11:44,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:44,652 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 945 transitions. [2021-06-12 20:11:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:44,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:44,652 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:44,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable798 [2021-06-12 20:11:44,853 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:44,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:44,853 INFO L82 PathProgramCache]: Analyzing trace with hash 129512560, now seen corresponding path program 53 times [2021-06-12 20:11:44,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:44,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991471663] [2021-06-12 20:11:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:45,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:45,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991471663] [2021-06-12 20:11:45,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991471663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:45,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230868354] [2021-06-12 20:11:45,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:45,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:11:45,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:45,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:45,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:45,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230868354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:45,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:45,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 20:11:45,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568041820] [2021-06-12 20:11:45,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:11:45,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:45,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:11:45,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:11:45,484 INFO L87 Difference]: Start difference. First operand 317 states and 945 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:46,267 INFO L93 Difference]: Finished difference Result 594 states and 1685 transitions. [2021-06-12 20:11:46,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:11:46,267 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:46,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:46,268 INFO L225 Difference]: With dead ends: 594 [2021-06-12 20:11:46,268 INFO L226 Difference]: Without dead ends: 435 [2021-06-12 20:11:46,268 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1007.4ms TimeCoverageRelationStatistics Valid=211, Invalid=719, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:11:46,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-12 20:11:46,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 304. [2021-06-12 20:11:46,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:46,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2021-06-12 20:11:46,273 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2021-06-12 20:11:46,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:46,273 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2021-06-12 20:11:46,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:46,273 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2021-06-12 20:11:46,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:46,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:46,274 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:46,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-06-12 20:11:46,497 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:46,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:46,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1694127950, now seen corresponding path program 54 times [2021-06-12 20:11:46,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:46,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441376689] [2021-06-12 20:11:46,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:46,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:46,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441376689] [2021-06-12 20:11:46,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441376689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:46,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97686852] [2021-06-12 20:11:46,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:46,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:11:46,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:46,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:46,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:46,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97686852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:46,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:46,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:11:46,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843617601] [2021-06-12 20:11:46,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:11:46,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:46,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:11:46,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:11:46,780 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:47,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:47,013 INFO L93 Difference]: Finished difference Result 485 states and 1424 transitions. [2021-06-12 20:11:47,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:11:47,013 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:47,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:47,014 INFO L225 Difference]: With dead ends: 485 [2021-06-12 20:11:47,014 INFO L226 Difference]: Without dead ends: 485 [2021-06-12 20:11:47,014 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:11:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-12 20:11:47,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 319. [2021-06-12 20:11:47,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:47,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-06-12 20:11:47,019 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-06-12 20:11:47,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:47,019 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-06-12 20:11:47,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:47,019 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-06-12 20:11:47,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:47,020 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:47,020 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:47,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable855,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:47,243 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:47,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:47,244 INFO L82 PathProgramCache]: Analyzing trace with hash -541317644, now seen corresponding path program 55 times [2021-06-12 20:11:47,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:47,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999393942] [2021-06-12 20:11:47,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:47,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:47,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999393942] [2021-06-12 20:11:47,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999393942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:47,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936679912] [2021-06-12 20:11:47,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:47,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:47,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:47,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936679912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:47,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:47,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:11:47,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905021674] [2021-06-12 20:11:47,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:47,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:47,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:47,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:47,587 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:47,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:47,973 INFO L93 Difference]: Finished difference Result 594 states and 1723 transitions. [2021-06-12 20:11:47,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:11:47,974 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:47,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:47,975 INFO L225 Difference]: With dead ends: 594 [2021-06-12 20:11:47,975 INFO L226 Difference]: Without dead ends: 594 [2021-06-12 20:11:47,975 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:11:47,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-12 20:11:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 331. [2021-06-12 20:11:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.984848484848485) internal successors, (985), 330 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 985 transitions. [2021-06-12 20:11:47,980 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 985 transitions. Word has length 22 [2021-06-12 20:11:47,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:47,980 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 985 transitions. [2021-06-12 20:11:47,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:47,980 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 985 transitions. [2021-06-12 20:11:47,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:47,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:47,981 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:48,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable859,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:48,205 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:48,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:48,205 INFO L82 PathProgramCache]: Analyzing trace with hash 953285320, now seen corresponding path program 56 times [2021-06-12 20:11:48,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:48,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31347092] [2021-06-12 20:11:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:48,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:48,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31347092] [2021-06-12 20:11:48,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31347092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:48,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272348601] [2021-06-12 20:11:48,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:48,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:11:48,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:48,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:48,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:48,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272348601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:48,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:48,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:11:48,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816041906] [2021-06-12 20:11:48,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:48,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:48,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:48,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:48,484 INFO L87 Difference]: Start difference. First operand 331 states and 985 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:48,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:48,751 INFO L93 Difference]: Finished difference Result 573 states and 1658 transitions. [2021-06-12 20:11:48,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:11:48,751 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:48,752 INFO L225 Difference]: With dead ends: 573 [2021-06-12 20:11:48,752 INFO L226 Difference]: Without dead ends: 563 [2021-06-12 20:11:48,752 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:11:48,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-12 20:11:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 338. [2021-06-12 20:11:48,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.964391691394659) internal successors, (999), 337 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 999 transitions. [2021-06-12 20:11:48,757 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 999 transitions. Word has length 22 [2021-06-12 20:11:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:48,757 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 999 transitions. [2021-06-12 20:11:48,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:48,757 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 999 transitions. [2021-06-12 20:11:48,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:48,758 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:48,758 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:48,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable865,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:48,982 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:48,983 INFO L82 PathProgramCache]: Analyzing trace with hash 634173000, now seen corresponding path program 57 times [2021-06-12 20:11:48,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:48,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002996143] [2021-06-12 20:11:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:49,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:49,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002996143] [2021-06-12 20:11:49,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002996143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:49,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268461949] [2021-06-12 20:11:49,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:49,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:11:49,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:49,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:49,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:49,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268461949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:49,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:49,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:11:49,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202963977] [2021-06-12 20:11:49,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:49,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:49,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:49,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:49,254 INFO L87 Difference]: Start difference. First operand 338 states and 999 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:49,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:49,515 INFO L93 Difference]: Finished difference Result 506 states and 1487 transitions. [2021-06-12 20:11:49,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:11:49,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:49,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:49,517 INFO L225 Difference]: With dead ends: 506 [2021-06-12 20:11:49,517 INFO L226 Difference]: Without dead ends: 506 [2021-06-12 20:11:49,517 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 225.3ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:11:49,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-12 20:11:49,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 319. [2021-06-12 20:11:49,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:49,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-06-12 20:11:49,522 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-06-12 20:11:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:49,522 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-06-12 20:11:49,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:49,522 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-06-12 20:11:49,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:49,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:49,524 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:49,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-06-12 20:11:49,748 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:49,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1424442098, now seen corresponding path program 58 times [2021-06-12 20:11:49,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:49,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859860403] [2021-06-12 20:11:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:49,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:49,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859860403] [2021-06-12 20:11:49,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859860403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:49,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050498663] [2021-06-12 20:11:49,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:49,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:11:49,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:49,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:49,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:50,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050498663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:50,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:50,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:11:50,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044315158] [2021-06-12 20:11:50,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:50,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:50,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:50,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:50,039 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:50,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:50,391 INFO L93 Difference]: Finished difference Result 458 states and 1333 transitions. [2021-06-12 20:11:50,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:11:50,391 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:50,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:50,392 INFO L225 Difference]: With dead ends: 458 [2021-06-12 20:11:50,392 INFO L226 Difference]: Without dead ends: 458 [2021-06-12 20:11:50,393 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 312.4ms TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:11:50,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-12 20:11:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 328. [2021-06-12 20:11:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9663608562691133) internal successors, (970), 327 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:50,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 970 transitions. [2021-06-12 20:11:50,398 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 970 transitions. Word has length 22 [2021-06-12 20:11:50,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:50,399 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 970 transitions. [2021-06-12 20:11:50,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:50,399 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 970 transitions. [2021-06-12 20:11:50,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:50,399 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:50,400 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:50,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable874,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:50,617 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:50,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:50,617 INFO L82 PathProgramCache]: Analyzing trace with hash 70160866, now seen corresponding path program 59 times [2021-06-12 20:11:50,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:50,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883274662] [2021-06-12 20:11:50,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:50,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:50,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883274662] [2021-06-12 20:11:50,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883274662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:50,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340536534] [2021-06-12 20:11:50,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:50,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:11:50,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:50,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:50,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:50,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340536534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:50,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:50,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:11:50,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522009207] [2021-06-12 20:11:50,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:50,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:50,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:50,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:50,865 INFO L87 Difference]: Start difference. First operand 328 states and 970 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:51,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:51,078 INFO L93 Difference]: Finished difference Result 475 states and 1370 transitions. [2021-06-12 20:11:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:11:51,079 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:51,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:51,079 INFO L225 Difference]: With dead ends: 475 [2021-06-12 20:11:51,079 INFO L226 Difference]: Without dead ends: 465 [2021-06-12 20:11:51,080 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:11:51,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-12 20:11:51,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 325. [2021-06-12 20:11:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.95679012345679) internal successors, (958), 324 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:51,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 958 transitions. [2021-06-12 20:11:51,084 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 958 transitions. Word has length 22 [2021-06-12 20:11:51,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:51,084 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 958 transitions. [2021-06-12 20:11:51,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:51,084 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 958 transitions. [2021-06-12 20:11:51,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:51,084 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:51,084 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:51,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable879 [2021-06-12 20:11:51,292 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:51,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:51,303 INFO L82 PathProgramCache]: Analyzing trace with hash 495108076, now seen corresponding path program 60 times [2021-06-12 20:11:51,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:51,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497574901] [2021-06-12 20:11:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:51,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:51,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497574901] [2021-06-12 20:11:51,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497574901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:51,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930650083] [2021-06-12 20:11:51,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:51,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:11:51,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:51,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:51,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:52,017 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-12 20:11:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:52,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930650083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:52,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:52,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:11:52,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708310740] [2021-06-12 20:11:52,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:52,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:52,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:52,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:52,842 INFO L87 Difference]: Start difference. First operand 325 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:52,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:52,999 INFO L93 Difference]: Finished difference Result 364 states and 1056 transitions. [2021-06-12 20:11:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:11:53,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:53,000 INFO L225 Difference]: With dead ends: 364 [2021-06-12 20:11:53,000 INFO L226 Difference]: Without dead ends: 344 [2021-06-12 20:11:53,001 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 919.9ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:11:53,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-12 20:11:53,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 322. [2021-06-12 20:11:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.9470404984423677) internal successors, (946), 321 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 946 transitions. [2021-06-12 20:11:53,005 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 946 transitions. Word has length 22 [2021-06-12 20:11:53,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:53,005 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 946 transitions. [2021-06-12 20:11:53,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:53,005 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 946 transitions. [2021-06-12 20:11:53,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:53,006 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:53,006 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:53,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable885,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:53,221 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:53,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:53,221 INFO L82 PathProgramCache]: Analyzing trace with hash 656029498, now seen corresponding path program 61 times [2021-06-12 20:11:53,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:53,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751358278] [2021-06-12 20:11:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:53,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:53,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751358278] [2021-06-12 20:11:53,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751358278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:53,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100196599] [2021-06-12 20:11:53,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:53,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:53,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:53,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100196599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:53,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:53,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:11:53,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447828552] [2021-06-12 20:11:53,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:53,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:53,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:53,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:53,506 INFO L87 Difference]: Start difference. First operand 322 states and 946 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:53,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:53,775 INFO L93 Difference]: Finished difference Result 488 states and 1415 transitions. [2021-06-12 20:11:53,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:11:53,775 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:53,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:53,776 INFO L225 Difference]: With dead ends: 488 [2021-06-12 20:11:53,776 INFO L226 Difference]: Without dead ends: 488 [2021-06-12 20:11:53,776 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 255.6ms TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:11:53,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-12 20:11:53,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 334. [2021-06-12 20:11:53,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.984984984984985) internal successors, (994), 333 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:53,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 994 transitions. [2021-06-12 20:11:53,781 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 994 transitions. Word has length 22 [2021-06-12 20:11:53,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:53,782 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 994 transitions. [2021-06-12 20:11:53,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:53,782 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 994 transitions. [2021-06-12 20:11:53,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:53,782 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:53,782 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:54,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-06-12 20:11:54,001 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:54,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:54,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2144334834, now seen corresponding path program 62 times [2021-06-12 20:11:54,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:54,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019221125] [2021-06-12 20:11:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:54,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:54,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019221125] [2021-06-12 20:11:54,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019221125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:54,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670220223] [2021-06-12 20:11:54,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:54,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:11:54,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:54,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:54,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:54,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670220223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:54,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:54,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:11:54,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949872141] [2021-06-12 20:11:54,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:54,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:54,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:54,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:54,400 INFO L87 Difference]: Start difference. First operand 334 states and 994 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:54,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:54,595 INFO L93 Difference]: Finished difference Result 473 states and 1368 transitions. [2021-06-12 20:11:54,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:11:54,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:54,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:54,596 INFO L225 Difference]: With dead ends: 473 [2021-06-12 20:11:54,596 INFO L226 Difference]: Without dead ends: 463 [2021-06-12 20:11:54,596 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:11:54,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-12 20:11:54,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 341. [2021-06-12 20:11:54,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9647058823529413) internal successors, (1008), 340 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1008 transitions. [2021-06-12 20:11:54,602 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1008 transitions. Word has length 22 [2021-06-12 20:11:54,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:54,602 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1008 transitions. [2021-06-12 20:11:54,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:54,602 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1008 transitions. [2021-06-12 20:11:54,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:54,603 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:54,603 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:54,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable894,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:54,817 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:54,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:54,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1831520142, now seen corresponding path program 63 times [2021-06-12 20:11:54,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:54,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184296614] [2021-06-12 20:11:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:55,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:55,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184296614] [2021-06-12 20:11:55,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184296614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:55,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676521530] [2021-06-12 20:11:55,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:55,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:11:55,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:55,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:55,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:55,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:55,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676521530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:55,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:55,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:11:55,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251693699] [2021-06-12 20:11:55,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:55,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:55,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:55,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:55,348 INFO L87 Difference]: Start difference. First operand 341 states and 1008 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:55,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:55,559 INFO L93 Difference]: Finished difference Result 400 states and 1179 transitions. [2021-06-12 20:11:55,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:11:55,559 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:55,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:55,560 INFO L225 Difference]: With dead ends: 400 [2021-06-12 20:11:55,560 INFO L226 Difference]: Without dead ends: 400 [2021-06-12 20:11:55,560 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 371.7ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:11:55,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-12 20:11:55,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 319. [2021-06-12 20:11:55,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-06-12 20:11:55,565 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-06-12 20:11:55,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:55,565 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-06-12 20:11:55,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:55,565 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-06-12 20:11:55,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:55,565 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:55,566 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:55,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:55,783 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:55,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:55,783 INFO L82 PathProgramCache]: Analyzing trace with hash -640453132, now seen corresponding path program 64 times [2021-06-12 20:11:55,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:55,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617188442] [2021-06-12 20:11:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:55,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:55,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617188442] [2021-06-12 20:11:55,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617188442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:55,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932371214] [2021-06-12 20:11:55,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:55,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:11:55,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:55,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:55,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:56,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932371214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:56,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:56,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:11:56,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796984175] [2021-06-12 20:11:56,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:56,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:56,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:56,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:56,074 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:56,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:56,323 INFO L93 Difference]: Finished difference Result 563 states and 1637 transitions. [2021-06-12 20:11:56,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:11:56,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:56,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:56,325 INFO L225 Difference]: With dead ends: 563 [2021-06-12 20:11:56,325 INFO L226 Difference]: Without dead ends: 563 [2021-06-12 20:11:56,325 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 250.8ms TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:11:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-12 20:11:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 337. [2021-06-12 20:11:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9851190476190474) internal successors, (1003), 336 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:56,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1003 transitions. [2021-06-12 20:11:56,330 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1003 transitions. Word has length 22 [2021-06-12 20:11:56,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:56,331 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1003 transitions. [2021-06-12 20:11:56,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:56,331 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1003 transitions. [2021-06-12 20:11:56,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:56,331 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:56,331 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:56,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable903 [2021-06-12 20:11:56,549 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:56,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:56,550 INFO L82 PathProgramCache]: Analyzing trace with hash 854149832, now seen corresponding path program 65 times [2021-06-12 20:11:56,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:56,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897833199] [2021-06-12 20:11:56,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:56,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:56,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:56,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897833199] [2021-06-12 20:11:56,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897833199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:56,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359837970] [2021-06-12 20:11:56,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:56,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:11:56,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:56,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:56,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:56,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359837970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:56,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:56,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:11:56,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423410811] [2021-06-12 20:11:56,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:56,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:56,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:56,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:56,936 INFO L87 Difference]: Start difference. First operand 337 states and 1003 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:57,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:57,567 INFO L93 Difference]: Finished difference Result 595 states and 1719 transitions. [2021-06-12 20:11:57,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:11:57,567 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:57,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:57,568 INFO L225 Difference]: With dead ends: 595 [2021-06-12 20:11:57,568 INFO L226 Difference]: Without dead ends: 585 [2021-06-12 20:11:57,568 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 549.1ms TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:11:57,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-12 20:11:57,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 334. [2021-06-12 20:11:57,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.975975975975976) internal successors, (991), 333 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:57,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 991 transitions. [2021-06-12 20:11:57,572 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 991 transitions. Word has length 22 [2021-06-12 20:11:57,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:57,572 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 991 transitions. [2021-06-12 20:11:57,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:57,572 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 991 transitions. [2021-06-12 20:11:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:57,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:57,573 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:57,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable909 [2021-06-12 20:11:57,775 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:57,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:57,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1279097042, now seen corresponding path program 66 times [2021-06-12 20:11:57,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:57,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270340116] [2021-06-12 20:11:57,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:57,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:57,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270340116] [2021-06-12 20:11:57,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270340116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:57,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114067794] [2021-06-12 20:11:57,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:57,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:11:57,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:57,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:57,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:57,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:57,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114067794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:57,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:57,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:11:57,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975948966] [2021-06-12 20:11:57,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:57,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:57,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:57,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:57,998 INFO L87 Difference]: Start difference. First operand 334 states and 991 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:58,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:58,319 INFO L93 Difference]: Finished difference Result 572 states and 1665 transitions. [2021-06-12 20:11:58,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:11:58,319 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:58,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:58,320 INFO L225 Difference]: With dead ends: 572 [2021-06-12 20:11:58,320 INFO L226 Difference]: Without dead ends: 552 [2021-06-12 20:11:58,320 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 270.4ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:11:58,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-12 20:11:58,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 331. [2021-06-12 20:11:58,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.966666666666667) internal successors, (979), 330 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 979 transitions. [2021-06-12 20:11:58,324 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 979 transitions. Word has length 22 [2021-06-12 20:11:58,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:58,324 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 979 transitions. [2021-06-12 20:11:58,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:58,324 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 979 transitions. [2021-06-12 20:11:58,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:58,325 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:58,325 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:58,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable915,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:58,525 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:58,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:58,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1244273694, now seen corresponding path program 67 times [2021-06-12 20:11:58,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:58,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354774029] [2021-06-12 20:11:58,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:58,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:58,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354774029] [2021-06-12 20:11:58,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354774029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:58,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598452478] [2021-06-12 20:11:58,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:58,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:58,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:58,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598452478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:58,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:58,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:11:58,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632850312] [2021-06-12 20:11:58,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:58,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:58,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:58,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:58,738 INFO L87 Difference]: Start difference. First operand 331 states and 979 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:58,993 INFO L93 Difference]: Finished difference Result 515 states and 1495 transitions. [2021-06-12 20:11:58,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:11:58,993 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:58,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:58,994 INFO L225 Difference]: With dead ends: 515 [2021-06-12 20:11:58,994 INFO L226 Difference]: Without dead ends: 479 [2021-06-12 20:11:58,994 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:11:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-12 20:11:58,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 325. [2021-06-12 20:11:58,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.947530864197531) internal successors, (955), 324 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:58,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 955 transitions. [2021-06-12 20:11:58,998 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 955 transitions. Word has length 22 [2021-06-12 20:11:58,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:58,998 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 955 transitions. [2021-06-12 20:11:58,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:58,998 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 955 transitions. [2021-06-12 20:11:58,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:58,998 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:58,998 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:59,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable918,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:59,199 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:59,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:59,199 INFO L82 PathProgramCache]: Analyzing trace with hash 697114082, now seen corresponding path program 68 times [2021-06-12 20:11:59,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:59,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350204992] [2021-06-12 20:11:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:59,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:59,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350204992] [2021-06-12 20:11:59,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350204992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:59,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269717334] [2021-06-12 20:11:59,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:59,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:11:59,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:59,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:59,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:11:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:59,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269717334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:59,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:11:59,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:11:59,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395277990] [2021-06-12 20:11:59,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:11:59,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:11:59,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:11:59,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:11:59,440 INFO L87 Difference]: Start difference. First operand 325 states and 955 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:59,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:11:59,607 INFO L93 Difference]: Finished difference Result 461 states and 1343 transitions. [2021-06-12 20:11:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:11:59,608 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:11:59,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:11:59,609 INFO L225 Difference]: With dead ends: 461 [2021-06-12 20:11:59,609 INFO L226 Difference]: Without dead ends: 461 [2021-06-12 20:11:59,609 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:11:59,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-12 20:11:59,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 334. [2021-06-12 20:11:59,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.966966966966967) internal successors, (988), 333 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 988 transitions. [2021-06-12 20:11:59,615 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 988 transitions. Word has length 22 [2021-06-12 20:11:59,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:11:59,615 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 988 transitions. [2021-06-12 20:11:59,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:11:59,616 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 988 transitions. [2021-06-12 20:11:59,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:11:59,617 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:11:59,617 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:11:59,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:59,821 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:11:59,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:11:59,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2103250250, now seen corresponding path program 69 times [2021-06-12 20:11:59,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:11:59,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848315841] [2021-06-12 20:11:59,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:11:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:11:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:11:59,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:11:59,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848315841] [2021-06-12 20:11:59,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848315841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:11:59,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498551600] [2021-06-12 20:11:59,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:11:59,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:11:59,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:11:59,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:11:59,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:00,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498551600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:00,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:00,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:00,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090710500] [2021-06-12 20:12:00,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:00,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:00,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:00,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:00,105 INFO L87 Difference]: Start difference. First operand 334 states and 988 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:00,401 INFO L93 Difference]: Finished difference Result 492 states and 1422 transitions. [2021-06-12 20:12:00,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:12:00,401 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:00,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:00,402 INFO L225 Difference]: With dead ends: 492 [2021-06-12 20:12:00,402 INFO L226 Difference]: Without dead ends: 482 [2021-06-12 20:12:00,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:12:00,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-12 20:12:00,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 331. [2021-06-12 20:12:00,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9575757575757575) internal successors, (976), 330 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:00,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 976 transitions. [2021-06-12 20:12:00,406 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 976 transitions. Word has length 22 [2021-06-12 20:12:00,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:00,406 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 976 transitions. [2021-06-12 20:12:00,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:00,406 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 976 transitions. [2021-06-12 20:12:00,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:00,407 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:00,407 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:00,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable928 [2021-06-12 20:12:00,607 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:00,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:00,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1678303040, now seen corresponding path program 70 times [2021-06-12 20:12:00,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:00,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126353332] [2021-06-12 20:12:00,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:00,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:00,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126353332] [2021-06-12 20:12:00,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126353332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:00,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056692989] [2021-06-12 20:12:00,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:00,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:12:00,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:00,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:00,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:00,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056692989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:00,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:00,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:00,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107622004] [2021-06-12 20:12:00,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:00,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:00,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:00,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:00,880 INFO L87 Difference]: Start difference. First operand 331 states and 976 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:01,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:01,133 INFO L93 Difference]: Finished difference Result 446 states and 1303 transitions. [2021-06-12 20:12:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:12:01,133 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:01,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:01,134 INFO L225 Difference]: With dead ends: 446 [2021-06-12 20:12:01,134 INFO L226 Difference]: Without dead ends: 426 [2021-06-12 20:12:01,134 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:12:01,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-12 20:12:01,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2021-06-12 20:12:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.948012232415902) internal successors, (964), 327 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 964 transitions. [2021-06-12 20:12:01,138 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 964 transitions. Word has length 22 [2021-06-12 20:12:01,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:01,138 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 964 transitions. [2021-06-12 20:12:01,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:01,138 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 964 transitions. [2021-06-12 20:12:01,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:01,139 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:01,139 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:01,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:01,340 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:01,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:01,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1517381618, now seen corresponding path program 71 times [2021-06-12 20:12:01,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:01,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599992745] [2021-06-12 20:12:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:01,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:01,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599992745] [2021-06-12 20:12:01,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599992745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:01,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249415213] [2021-06-12 20:12:01,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:01,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:12:01,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:01,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:01,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:01,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249415213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:01,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:01,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:01,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441150547] [2021-06-12 20:12:01,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:01,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:01,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:01,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:01,611 INFO L87 Difference]: Start difference. First operand 328 states and 964 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:01,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:01,943 INFO L93 Difference]: Finished difference Result 502 states and 1458 transitions. [2021-06-12 20:12:01,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:12:01,944 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:01,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:01,944 INFO L225 Difference]: With dead ends: 502 [2021-06-12 20:12:01,944 INFO L226 Difference]: Without dead ends: 502 [2021-06-12 20:12:01,945 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 260.8ms TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-12 20:12:01,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 340. [2021-06-12 20:12:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9852507374631267) internal successors, (1012), 339 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1012 transitions. [2021-06-12 20:12:01,963 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1012 transitions. Word has length 22 [2021-06-12 20:12:01,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:01,964 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1012 transitions. [2021-06-12 20:12:01,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1012 transitions. [2021-06-12 20:12:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:01,964 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:01,964 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:02,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:02,187 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:02,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:02,188 INFO L82 PathProgramCache]: Analyzing trace with hash -22778654, now seen corresponding path program 72 times [2021-06-12 20:12:02,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:02,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861198825] [2021-06-12 20:12:02,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:02,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:02,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861198825] [2021-06-12 20:12:02,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861198825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:02,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125600274] [2021-06-12 20:12:02,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:02,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:12:02,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:02,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:02,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:02,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125600274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:02,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:02,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:02,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368377336] [2021-06-12 20:12:02,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:02,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:02,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:02,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:02,437 INFO L87 Difference]: Start difference. First operand 340 states and 1012 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:02,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:02,620 INFO L93 Difference]: Finished difference Result 490 states and 1420 transitions. [2021-06-12 20:12:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:12:02,620 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:02,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:02,621 INFO L225 Difference]: With dead ends: 490 [2021-06-12 20:12:02,621 INFO L226 Difference]: Without dead ends: 480 [2021-06-12 20:12:02,621 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:12:02,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-12 20:12:02,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 347. [2021-06-12 20:12:02,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.9653179190751446) internal successors, (1026), 346 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1026 transitions. [2021-06-12 20:12:02,625 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1026 transitions. Word has length 22 [2021-06-12 20:12:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:02,625 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1026 transitions. [2021-06-12 20:12:02,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:02,625 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1026 transitions. [2021-06-12 20:12:02,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:02,626 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:02,626 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:02,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable943,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:02,827 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:02,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:02,827 INFO L82 PathProgramCache]: Analyzing trace with hash -341890974, now seen corresponding path program 73 times [2021-06-12 20:12:02,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:02,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723553502] [2021-06-12 20:12:02,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:02,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:02,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723553502] [2021-06-12 20:12:02,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723553502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:02,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407115780] [2021-06-12 20:12:02,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:02,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:02,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:03,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407115780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:03,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:03,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:12:03,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472289029] [2021-06-12 20:12:03,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:12:03,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:03,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:12:03,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:12:03,090 INFO L87 Difference]: Start difference. First operand 347 states and 1026 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:03,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:03,264 INFO L93 Difference]: Finished difference Result 414 states and 1222 transitions. [2021-06-12 20:12:03,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:12:03,264 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:03,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:03,265 INFO L225 Difference]: With dead ends: 414 [2021-06-12 20:12:03,265 INFO L226 Difference]: Without dead ends: 414 [2021-06-12 20:12:03,265 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 178.5ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:12:03,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-12 20:12:03,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 319. [2021-06-12 20:12:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.9465408805031448) internal successors, (937), 318 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 937 transitions. [2021-06-12 20:12:03,268 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 937 transitions. Word has length 22 [2021-06-12 20:12:03,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:03,269 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 937 transitions. [2021-06-12 20:12:03,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:03,269 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 937 transitions. [2021-06-12 20:12:03,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:03,269 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:03,269 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:03,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable949,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:03,470 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:03,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:03,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1055430800, now seen corresponding path program 74 times [2021-06-12 20:12:03,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:03,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556695366] [2021-06-12 20:12:03,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:03,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:03,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556695366] [2021-06-12 20:12:03,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556695366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:03,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363646501] [2021-06-12 20:12:03,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:03,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:12:03,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:03,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:03,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:03,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363646501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:03,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:03,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:12:03,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63677989] [2021-06-12 20:12:03,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:12:03,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:03,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:12:03,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:12:03,687 INFO L87 Difference]: Start difference. First operand 319 states and 937 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:04,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:04,002 INFO L93 Difference]: Finished difference Result 554 states and 1630 transitions. [2021-06-12 20:12:04,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:12:04,003 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:04,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:04,003 INFO L225 Difference]: With dead ends: 554 [2021-06-12 20:12:04,003 INFO L226 Difference]: Without dead ends: 554 [2021-06-12 20:12:04,003 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 236.6ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:04,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-12 20:12:04,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 326. [2021-06-12 20:12:04,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9476923076923076) internal successors, (958), 325 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:04,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 958 transitions. [2021-06-12 20:12:04,007 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 958 transitions. Word has length 22 [2021-06-12 20:12:04,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:04,008 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 958 transitions. [2021-06-12 20:12:04,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:04,008 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 958 transitions. [2021-06-12 20:12:04,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:04,008 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:04,008 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:04,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable952,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:04,209 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:04,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:04,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1004090902, now seen corresponding path program 75 times [2021-06-12 20:12:04,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:04,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370219392] [2021-06-12 20:12:04,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:04,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:04,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370219392] [2021-06-12 20:12:04,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370219392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:04,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382237121] [2021-06-12 20:12:04,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:04,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:12:04,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:04,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:04,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:04,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382237121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:04,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:04,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:04,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369742978] [2021-06-12 20:12:04,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:04,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:04,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:04,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:04,512 INFO L87 Difference]: Start difference. First operand 326 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:04,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:04,945 INFO L93 Difference]: Finished difference Result 651 states and 1893 transitions. [2021-06-12 20:12:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:12:04,945 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:04,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:04,946 INFO L225 Difference]: With dead ends: 651 [2021-06-12 20:12:04,946 INFO L226 Difference]: Without dead ends: 651 [2021-06-12 20:12:04,946 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 383.7ms TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:12:04,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-06-12 20:12:04,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 338. [2021-06-12 20:12:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9851632047477743) internal successors, (1006), 337 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:04,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1006 transitions. [2021-06-12 20:12:04,952 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1006 transitions. Word has length 22 [2021-06-12 20:12:04,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:04,952 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1006 transitions. [2021-06-12 20:12:04,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:04,952 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1006 transitions. [2021-06-12 20:12:04,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:04,953 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:04,953 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:05,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:05,154 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:05,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:05,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1796273430, now seen corresponding path program 76 times [2021-06-12 20:12:05,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:05,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770108810] [2021-06-12 20:12:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:05,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:05,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770108810] [2021-06-12 20:12:05,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770108810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:05,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083607643] [2021-06-12 20:12:05,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:05,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:12:05,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:05,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:05,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:05,589 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-12 20:12:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:05,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083607643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:05,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:05,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:05,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171536920] [2021-06-12 20:12:05,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:05,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:05,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:05,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:05,668 INFO L87 Difference]: Start difference. First operand 338 states and 1006 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:06,001 INFO L93 Difference]: Finished difference Result 642 states and 1864 transitions. [2021-06-12 20:12:06,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:12:06,001 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:06,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:06,002 INFO L225 Difference]: With dead ends: 642 [2021-06-12 20:12:06,002 INFO L226 Difference]: Without dead ends: 632 [2021-06-12 20:12:06,002 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 457.1ms TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:06,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-12 20:12:06,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 345. [2021-06-12 20:12:06,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.9651162790697674) internal successors, (1020), 344 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:06,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1020 transitions. [2021-06-12 20:12:06,007 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1020 transitions. Word has length 22 [2021-06-12 20:12:06,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:06,007 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1020 transitions. [2021-06-12 20:12:06,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:06,007 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1020 transitions. [2021-06-12 20:12:06,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:06,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:06,007 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:06,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable961 [2021-06-12 20:12:06,208 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:06,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:06,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2115385750, now seen corresponding path program 77 times [2021-06-12 20:12:06,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:06,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557296659] [2021-06-12 20:12:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:06,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:06,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557296659] [2021-06-12 20:12:06,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557296659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:06,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604488378] [2021-06-12 20:12:06,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:06,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:12:06,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:06,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:06,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:06,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604488378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:06,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:06,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:06,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517714868] [2021-06-12 20:12:06,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:06,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:06,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:06,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:06,559 INFO L87 Difference]: Start difference. First operand 345 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:06,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:06,921 INFO L93 Difference]: Finished difference Result 560 states and 1648 transitions. [2021-06-12 20:12:06,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:12:06,922 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:06,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:06,922 INFO L225 Difference]: With dead ends: 560 [2021-06-12 20:12:06,923 INFO L226 Difference]: Without dead ends: 560 [2021-06-12 20:12:06,923 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:06,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-12 20:12:06,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 323. [2021-06-12 20:12:06,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9472049689440993) internal successors, (949), 322 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:06,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 949 transitions. [2021-06-12 20:12:06,941 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 949 transitions. Word has length 22 [2021-06-12 20:12:06,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:06,941 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 949 transitions. [2021-06-12 20:12:06,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:06,941 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 949 transitions. [2021-06-12 20:12:06,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:06,942 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:06,942 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:07,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable966,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:07,149 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:07,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:07,150 INFO L82 PathProgramCache]: Analyzing trace with hash 120966448, now seen corresponding path program 78 times [2021-06-12 20:12:07,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:07,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269008277] [2021-06-12 20:12:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:07,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:07,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269008277] [2021-06-12 20:12:07,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269008277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:07,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910623111] [2021-06-12 20:12:07,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:07,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:12:07,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:07,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:07,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:07,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910623111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:07,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:07,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:07,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731912505] [2021-06-12 20:12:07,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:07,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:07,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:07,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:07,477 INFO L87 Difference]: Start difference. First operand 323 states and 949 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:07,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:07,774 INFO L93 Difference]: Finished difference Result 503 states and 1467 transitions. [2021-06-12 20:12:07,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:12:07,775 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:07,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:07,775 INFO L225 Difference]: With dead ends: 503 [2021-06-12 20:12:07,775 INFO L226 Difference]: Without dead ends: 503 [2021-06-12 20:12:07,776 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 312.9ms TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:12:07,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-12 20:12:07,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 332. [2021-06-12 20:12:07,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9667673716012084) internal successors, (982), 331 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:07,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 982 transitions. [2021-06-12 20:12:07,780 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 982 transitions. Word has length 22 [2021-06-12 20:12:07,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:07,780 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 982 transitions. [2021-06-12 20:12:07,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:07,780 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 982 transitions. [2021-06-12 20:12:07,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:07,781 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:07,781 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:07,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable970,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:07,981 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:07,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:07,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1615569412, now seen corresponding path program 79 times [2021-06-12 20:12:07,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:07,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62900366] [2021-06-12 20:12:07,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:08,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:08,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62900366] [2021-06-12 20:12:08,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62900366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:08,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563917414] [2021-06-12 20:12:08,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:08,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:08,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:08,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563917414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:08,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:08,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:08,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749756804] [2021-06-12 20:12:08,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:08,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:08,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:08,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:08,311 INFO L87 Difference]: Start difference. First operand 332 states and 982 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:08,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:08,669 INFO L93 Difference]: Finished difference Result 523 states and 1513 transitions. [2021-06-12 20:12:08,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:12:08,669 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:08,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:08,670 INFO L225 Difference]: With dead ends: 523 [2021-06-12 20:12:08,670 INFO L226 Difference]: Without dead ends: 513 [2021-06-12 20:12:08,670 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:12:08,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-12 20:12:08,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 329. [2021-06-12 20:12:08,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.957317073170732) internal successors, (970), 328 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:08,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 970 transitions. [2021-06-12 20:12:08,675 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 970 transitions. Word has length 22 [2021-06-12 20:12:08,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:08,675 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 970 transitions. [2021-06-12 20:12:08,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:08,675 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 970 transitions. [2021-06-12 20:12:08,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:08,676 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:08,676 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:08,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-06-12 20:12:08,899 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:08,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:08,900 INFO L82 PathProgramCache]: Analyzing trace with hash 2040516622, now seen corresponding path program 80 times [2021-06-12 20:12:08,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:08,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084376587] [2021-06-12 20:12:08,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:09,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:09,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084376587] [2021-06-12 20:12:09,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084376587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:09,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658475043] [2021-06-12 20:12:09,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:09,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:12:09,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:09,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:09,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:09,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658475043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:09,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:09,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:09,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106603857] [2021-06-12 20:12:09,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:09,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:09,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:09,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:09,286 INFO L87 Difference]: Start difference. First operand 329 states and 970 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:09,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:09,579 INFO L93 Difference]: Finished difference Result 412 states and 1199 transitions. [2021-06-12 20:12:09,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:12:09,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:09,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:09,580 INFO L225 Difference]: With dead ends: 412 [2021-06-12 20:12:09,580 INFO L226 Difference]: Without dead ends: 392 [2021-06-12 20:12:09,580 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:12:09,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-12 20:12:09,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 326. [2021-06-12 20:12:09,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9476923076923076) internal successors, (958), 325 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:09,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 958 transitions. [2021-06-12 20:12:09,584 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 958 transitions. Word has length 22 [2021-06-12 20:12:09,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:09,585 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 958 transitions. [2021-06-12 20:12:09,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:09,585 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 958 transitions. [2021-06-12 20:12:09,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:09,585 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:09,585 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:09,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable980,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:09,786 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:09,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:09,799 INFO L82 PathProgramCache]: Analyzing trace with hash -2093529252, now seen corresponding path program 81 times [2021-06-12 20:12:09,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:09,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892515063] [2021-06-12 20:12:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:10,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:10,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892515063] [2021-06-12 20:12:10,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892515063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:10,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275847911] [2021-06-12 20:12:10,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:10,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:12:10,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:10,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:10,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:10,413 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-12 20:12:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:10,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275847911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:10,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:10,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:10,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502468797] [2021-06-12 20:12:10,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:10,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:10,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:10,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:10,490 INFO L87 Difference]: Start difference. First operand 326 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:10,888 INFO L93 Difference]: Finished difference Result 551 states and 1603 transitions. [2021-06-12 20:12:10,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:12:10,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:10,890 INFO L225 Difference]: With dead ends: 551 [2021-06-12 20:12:10,890 INFO L226 Difference]: Without dead ends: 551 [2021-06-12 20:12:10,890 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 630.4ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:10,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-12 20:12:10,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 338. [2021-06-12 20:12:10,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9851632047477743) internal successors, (1006), 337 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:10,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1006 transitions. [2021-06-12 20:12:10,895 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1006 transitions. Word has length 22 [2021-06-12 20:12:10,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:10,895 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1006 transitions. [2021-06-12 20:12:10,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:10,895 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1006 transitions. [2021-06-12 20:12:10,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:10,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:10,896 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:11,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-06-12 20:12:11,110 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:11,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:11,110 INFO L82 PathProgramCache]: Analyzing trace with hash -598926288, now seen corresponding path program 82 times [2021-06-12 20:12:11,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:11,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113605392] [2021-06-12 20:12:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:11,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:11,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113605392] [2021-06-12 20:12:11,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113605392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:11,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155161404] [2021-06-12 20:12:11,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:11,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:12:11,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:11,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:11,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:11,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155161404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:11,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:11,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:11,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076634266] [2021-06-12 20:12:11,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:11,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:11,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:11,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:11,442 INFO L87 Difference]: Start difference. First operand 338 states and 1006 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:11,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:11,725 INFO L93 Difference]: Finished difference Result 530 states and 1538 transitions. [2021-06-12 20:12:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:12:11,726 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:11,727 INFO L225 Difference]: With dead ends: 530 [2021-06-12 20:12:11,727 INFO L226 Difference]: Without dead ends: 520 [2021-06-12 20:12:11,727 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:12:11,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-12 20:12:11,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 345. [2021-06-12 20:12:11,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.9651162790697674) internal successors, (1020), 344 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1020 transitions. [2021-06-12 20:12:11,732 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1020 transitions. Word has length 22 [2021-06-12 20:12:11,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:11,732 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1020 transitions. [2021-06-12 20:12:11,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:11,732 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1020 transitions. [2021-06-12 20:12:11,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:11,733 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:11,733 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:11,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable988,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:11,958 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:11,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:11,958 INFO L82 PathProgramCache]: Analyzing trace with hash -918038608, now seen corresponding path program 83 times [2021-06-12 20:12:11,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:11,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422378614] [2021-06-12 20:12:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:12,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:12,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:12,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422378614] [2021-06-12 20:12:12,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422378614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:12,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613594842] [2021-06-12 20:12:12,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:12,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:12:12,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:12,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:12,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:12,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613594842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:12,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:12,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:12,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530866987] [2021-06-12 20:12:12,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:12,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:12,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:12,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:12,262 INFO L87 Difference]: Start difference. First operand 345 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:12,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:12,549 INFO L93 Difference]: Finished difference Result 451 states and 1331 transitions. [2021-06-12 20:12:12,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:12:12,549 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:12,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:12,550 INFO L225 Difference]: With dead ends: 451 [2021-06-12 20:12:12,550 INFO L226 Difference]: Without dead ends: 451 [2021-06-12 20:12:12,550 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:12:12,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-12 20:12:12,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 320. [2021-06-12 20:12:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.946708463949843) internal successors, (940), 319 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:12,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 940 transitions. [2021-06-12 20:12:12,554 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 940 transitions. Word has length 22 [2021-06-12 20:12:12,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:12,554 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 940 transitions. [2021-06-12 20:12:12,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:12,554 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 940 transitions. [2021-06-12 20:12:12,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:12,555 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:12,555 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:12,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable993 [2021-06-12 20:12:12,758 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:12,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:12,761 INFO L82 PathProgramCache]: Analyzing trace with hash -132951768, now seen corresponding path program 84 times [2021-06-12 20:12:12,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:12,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650172092] [2021-06-12 20:12:12,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:13,129 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-12 20:12:13,337 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-12 20:12:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:13,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:13,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650172092] [2021-06-12 20:12:13,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650172092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:13,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86038669] [2021-06-12 20:12:13,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:13,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:12:13,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:13,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:13,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:14,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86038669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:14,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:14,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:12:14,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871487905] [2021-06-12 20:12:14,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:12:14,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:14,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:12:14,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:12:14,082 INFO L87 Difference]: Start difference. First operand 320 states and 940 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:14,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:14,498 INFO L93 Difference]: Finished difference Result 736 states and 2158 transitions. [2021-06-12 20:12:14,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:12:14,498 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:14,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:14,499 INFO L225 Difference]: With dead ends: 736 [2021-06-12 20:12:14,499 INFO L226 Difference]: Without dead ends: 736 [2021-06-12 20:12:14,500 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1151.6ms TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:12:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-12 20:12:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 328. [2021-06-12 20:12:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9602446483180427) internal successors, (968), 327 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 968 transitions. [2021-06-12 20:12:14,515 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 968 transitions. Word has length 22 [2021-06-12 20:12:14,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:14,515 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 968 transitions. [2021-06-12 20:12:14,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:14,515 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 968 transitions. [2021-06-12 20:12:14,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:14,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:14,516 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:14,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable997,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:14,726 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:14,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1926569934, now seen corresponding path program 85 times [2021-06-12 20:12:14,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:14,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84100793] [2021-06-12 20:12:14,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:14,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:14,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84100793] [2021-06-12 20:12:14,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84100793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:14,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793814120] [2021-06-12 20:12:14,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:14,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:14,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:15,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793814120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:15,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:15,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:15,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995985196] [2021-06-12 20:12:15,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:15,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:15,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:15,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:15,166 INFO L87 Difference]: Start difference. First operand 328 states and 968 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:15,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:15,752 INFO L93 Difference]: Finished difference Result 755 states and 2196 transitions. [2021-06-12 20:12:15,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:12:15,752 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:15,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:15,753 INFO L225 Difference]: With dead ends: 755 [2021-06-12 20:12:15,753 INFO L226 Difference]: Without dead ends: 755 [2021-06-12 20:12:15,754 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 570.1ms TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:12:15,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-06-12 20:12:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 340. [2021-06-12 20:12:15,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9970501474926254) internal successors, (1016), 339 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1016 transitions. [2021-06-12 20:12:15,760 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1016 transitions. Word has length 22 [2021-06-12 20:12:15,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:15,760 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1016 transitions. [2021-06-12 20:12:15,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:15,761 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1016 transitions. [2021-06-12 20:12:15,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:15,761 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:15,761 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:15,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1002 [2021-06-12 20:12:15,978 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:15,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:15,978 INFO L82 PathProgramCache]: Analyzing trace with hash -873794398, now seen corresponding path program 86 times [2021-06-12 20:12:15,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:15,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093531385] [2021-06-12 20:12:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:16,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:16,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093531385] [2021-06-12 20:12:16,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093531385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:16,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993303193] [2021-06-12 20:12:16,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:16,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:12:16,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:16,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:16,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:16,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993303193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:16,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:16,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:16,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817183711] [2021-06-12 20:12:16,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:16,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:16,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:16,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:16,301 INFO L87 Difference]: Start difference. First operand 340 states and 1016 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:16,739 INFO L93 Difference]: Finished difference Result 758 states and 2203 transitions. [2021-06-12 20:12:16,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:12:16,739 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:16,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:16,740 INFO L225 Difference]: With dead ends: 758 [2021-06-12 20:12:16,740 INFO L226 Difference]: Without dead ends: 748 [2021-06-12 20:12:16,740 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 358.9ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:12:16,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-06-12 20:12:16,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 347. [2021-06-12 20:12:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.976878612716763) internal successors, (1030), 346 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1030 transitions. [2021-06-12 20:12:16,746 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1030 transitions. Word has length 22 [2021-06-12 20:12:16,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:16,746 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1030 transitions. [2021-06-12 20:12:16,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:16,746 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1030 transitions. [2021-06-12 20:12:16,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:16,747 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:16,747 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:16,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:16,947 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:16,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:16,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1192906718, now seen corresponding path program 87 times [2021-06-12 20:12:16,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:16,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671997382] [2021-06-12 20:12:16,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:17,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:17,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671997382] [2021-06-12 20:12:17,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671997382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:17,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419229263] [2021-06-12 20:12:17,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:17,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:12:17,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:17,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:17,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:17,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419229263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:17,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:17,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:17,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203673327] [2021-06-12 20:12:17,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:17,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:17,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:17,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:17,300 INFO L87 Difference]: Start difference. First operand 347 states and 1030 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:17,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:17,786 INFO L93 Difference]: Finished difference Result 686 states and 2019 transitions. [2021-06-12 20:12:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:12:17,786 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:17,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:17,787 INFO L225 Difference]: With dead ends: 686 [2021-06-12 20:12:17,787 INFO L226 Difference]: Without dead ends: 686 [2021-06-12 20:12:17,787 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 385.5ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:12:17,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-06-12 20:12:17,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 341. [2021-06-12 20:12:17,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.976470588235294) internal successors, (1012), 340 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:17,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1012 transitions. [2021-06-12 20:12:17,792 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1012 transitions. Word has length 22 [2021-06-12 20:12:17,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:17,792 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1012 transitions. [2021-06-12 20:12:17,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:17,792 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1012 transitions. [2021-06-12 20:12:17,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:17,793 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:17,793 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:17,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1019,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:17,993 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:17,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:17,993 INFO L82 PathProgramCache]: Analyzing trace with hash -241741712, now seen corresponding path program 88 times [2021-06-12 20:12:17,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:17,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621057464] [2021-06-12 20:12:17,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:18,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:18,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621057464] [2021-06-12 20:12:18,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621057464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:18,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628701281] [2021-06-12 20:12:18,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:18,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:12:18,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:18,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:18,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:18,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628701281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:18,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:18,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 20:12:18,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683509278] [2021-06-12 20:12:18,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:12:18,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:18,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:12:18,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:12:18,250 INFO L87 Difference]: Start difference. First operand 341 states and 1012 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:18,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:18,645 INFO L93 Difference]: Finished difference Result 621 states and 1823 transitions. [2021-06-12 20:12:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:12:18,646 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:18,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:18,646 INFO L225 Difference]: With dead ends: 621 [2021-06-12 20:12:18,646 INFO L226 Difference]: Without dead ends: 621 [2021-06-12 20:12:18,647 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 328.8ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:18,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-12 20:12:18,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 324. [2021-06-12 20:12:18,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:18,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-12 20:12:18,652 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-12 20:12:18,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:18,652 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-12 20:12:18,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:18,653 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-12 20:12:18,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:18,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:18,654 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:18,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1026,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:18,873 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:18,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:18,873 INFO L82 PathProgramCache]: Analyzing trace with hash 968794932, now seen corresponding path program 89 times [2021-06-12 20:12:18,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:18,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955153944] [2021-06-12 20:12:18,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:18,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:18,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955153944] [2021-06-12 20:12:18,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955153944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:18,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739202375] [2021-06-12 20:12:18,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:19,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:12:19,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:19,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:19,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:19,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739202375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:19,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:19,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:12:19,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507371792] [2021-06-12 20:12:19,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:12:19,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:19,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:12:19,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:12:19,132 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:19,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:19,487 INFO L93 Difference]: Finished difference Result 633 states and 1841 transitions. [2021-06-12 20:12:19,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:12:19,488 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:19,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:19,489 INFO L225 Difference]: With dead ends: 633 [2021-06-12 20:12:19,489 INFO L226 Difference]: Without dead ends: 633 [2021-06-12 20:12:19,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 307.1ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:19,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-12 20:12:19,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 336. [2021-06-12 20:12:19,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.985074626865672) internal successors, (1000), 335 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:19,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1000 transitions. [2021-06-12 20:12:19,493 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1000 transitions. Word has length 22 [2021-06-12 20:12:19,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:19,493 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1000 transitions. [2021-06-12 20:12:19,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:19,493 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1000 transitions. [2021-06-12 20:12:19,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:19,493 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:19,494 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:19,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1031,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:19,694 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:19,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:19,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1983309410, now seen corresponding path program 90 times [2021-06-12 20:12:19,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:19,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958478425] [2021-06-12 20:12:19,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:19,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:19,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958478425] [2021-06-12 20:12:19,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958478425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:19,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641734937] [2021-06-12 20:12:19,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:19,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:12:19,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:19,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:19,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:19,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641734937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:19,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:19,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:12:19,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900428548] [2021-06-12 20:12:19,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:12:19,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:19,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:12:19,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:12:19,955 INFO L87 Difference]: Start difference. First operand 336 states and 1000 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:20,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:20,342 INFO L93 Difference]: Finished difference Result 603 states and 1751 transitions. [2021-06-12 20:12:20,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:12:20,342 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:20,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:20,343 INFO L225 Difference]: With dead ends: 603 [2021-06-12 20:12:20,343 INFO L226 Difference]: Without dead ends: 594 [2021-06-12 20:12:20,343 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 323.2ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:20,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-12 20:12:20,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 342. [2021-06-12 20:12:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.967741935483871) internal successors, (1012), 341 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:20,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1012 transitions. [2021-06-12 20:12:20,347 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1012 transitions. Word has length 22 [2021-06-12 20:12:20,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:20,347 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1012 transitions. [2021-06-12 20:12:20,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:20,348 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1012 transitions. [2021-06-12 20:12:20,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:20,348 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:20,348 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:20,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1037 [2021-06-12 20:12:20,549 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:20,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:20,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1137989188, now seen corresponding path program 91 times [2021-06-12 20:12:20,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:20,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267516079] [2021-06-12 20:12:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:20,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:20,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267516079] [2021-06-12 20:12:20,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267516079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:20,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065533166] [2021-06-12 20:12:20,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:20,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:20,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:20,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065533166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:20,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:20,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:12:20,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065979105] [2021-06-12 20:12:20,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:12:20,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:20,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:12:20,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:12:20,850 INFO L87 Difference]: Start difference. First operand 342 states and 1012 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:21,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:21,174 INFO L93 Difference]: Finished difference Result 546 states and 1607 transitions. [2021-06-12 20:12:21,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:12:21,174 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:21,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:21,175 INFO L225 Difference]: With dead ends: 546 [2021-06-12 20:12:21,175 INFO L226 Difference]: Without dead ends: 546 [2021-06-12 20:12:21,175 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 325.4ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:21,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-12 20:12:21,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 324. [2021-06-12 20:12:21,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:21,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-12 20:12:21,180 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-12 20:12:21,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:21,181 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-12 20:12:21,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:21,181 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-12 20:12:21,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:21,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:21,181 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:21,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:21,389 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:21,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:21,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2141572440, now seen corresponding path program 92 times [2021-06-12 20:12:21,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:21,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533823162] [2021-06-12 20:12:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:21,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:21,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533823162] [2021-06-12 20:12:21,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533823162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:21,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074410260] [2021-06-12 20:12:21,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:21,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:12:21,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:21,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:21,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:21,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074410260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:21,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:21,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:21,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699518163] [2021-06-12 20:12:21,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:21,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:21,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:21,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:21,695 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:22,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:22,192 INFO L93 Difference]: Finished difference Result 733 states and 2130 transitions. [2021-06-12 20:12:22,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:12:22,192 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:22,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:22,193 INFO L225 Difference]: With dead ends: 733 [2021-06-12 20:12:22,193 INFO L226 Difference]: Without dead ends: 733 [2021-06-12 20:12:22,194 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 484.3ms TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:12:22,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-06-12 20:12:22,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 338. [2021-06-12 20:12:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0118694362017804) internal successors, (1015), 337 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:22,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1015 transitions. [2021-06-12 20:12:22,198 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1015 transitions. Word has length 22 [2021-06-12 20:12:22,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:22,198 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1015 transitions. [2021-06-12 20:12:22,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:22,198 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1015 transitions. [2021-06-12 20:12:22,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:22,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:22,199 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:22,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1048 [2021-06-12 20:12:22,399 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:22,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:22,400 INFO L82 PathProgramCache]: Analyzing trace with hash -646969476, now seen corresponding path program 93 times [2021-06-12 20:12:22,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:22,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043140015] [2021-06-12 20:12:22,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:22,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:22,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043140015] [2021-06-12 20:12:22,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043140015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:22,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301257887] [2021-06-12 20:12:22,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:22,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:12:22,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:22,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:22,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:22,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301257887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:22,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:22,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:22,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706630146] [2021-06-12 20:12:22,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:22,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:22,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:22,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:22,934 INFO L87 Difference]: Start difference. First operand 338 states and 1015 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:23,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:23,425 INFO L93 Difference]: Finished difference Result 767 states and 2208 transitions. [2021-06-12 20:12:23,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:12:23,426 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:23,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:23,427 INFO L225 Difference]: With dead ends: 767 [2021-06-12 20:12:23,427 INFO L226 Difference]: Without dead ends: 757 [2021-06-12 20:12:23,427 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 607.0ms TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:12:23,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-12 20:12:23,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 345. [2021-06-12 20:12:23,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.991279069767442) internal successors, (1029), 344 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1029 transitions. [2021-06-12 20:12:23,433 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1029 transitions. Word has length 22 [2021-06-12 20:12:23,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:23,433 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1029 transitions. [2021-06-12 20:12:23,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:23,433 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1029 transitions. [2021-06-12 20:12:23,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:23,434 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:23,434 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:23,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:23,648 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:23,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:23,649 INFO L82 PathProgramCache]: Analyzing trace with hash 803562480, now seen corresponding path program 94 times [2021-06-12 20:12:23,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:23,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560039419] [2021-06-12 20:12:23,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:23,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:23,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560039419] [2021-06-12 20:12:23,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560039419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:23,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753222763] [2021-06-12 20:12:23,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:23,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:12:23,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:23,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:23,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:23,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753222763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:23,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:23,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:23,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839230676] [2021-06-12 20:12:23,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:23,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:23,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:23,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:23,975 INFO L87 Difference]: Start difference. First operand 345 states and 1029 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:24,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:24,395 INFO L93 Difference]: Finished difference Result 745 states and 2169 transitions. [2021-06-12 20:12:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:12:24,396 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:24,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:24,397 INFO L225 Difference]: With dead ends: 745 [2021-06-12 20:12:24,397 INFO L226 Difference]: Without dead ends: 745 [2021-06-12 20:12:24,397 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 365.7ms TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:24,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-06-12 20:12:24,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 351. [2021-06-12 20:12:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0171428571428573) internal successors, (1056), 350 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:24,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1056 transitions. [2021-06-12 20:12:24,403 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1056 transitions. Word has length 22 [2021-06-12 20:12:24,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:24,403 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1056 transitions. [2021-06-12 20:12:24,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:24,403 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1056 transitions. [2021-06-12 20:12:24,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:24,404 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:24,404 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:24,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:24,621 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:24,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:24,621 INFO L82 PathProgramCache]: Analyzing trace with hash -708456964, now seen corresponding path program 95 times [2021-06-12 20:12:24,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:24,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648670581] [2021-06-12 20:12:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:24,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:24,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648670581] [2021-06-12 20:12:24,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648670581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:24,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783660488] [2021-06-12 20:12:24,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:24,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:12:24,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:24,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:24,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:25,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:25,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783660488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:25,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:25,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:25,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413123185] [2021-06-12 20:12:25,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:25,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:25,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:25,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:25,026 INFO L87 Difference]: Start difference. First operand 351 states and 1056 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:25,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:25,478 INFO L93 Difference]: Finished difference Result 754 states and 2175 transitions. [2021-06-12 20:12:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:12:25,478 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:25,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:25,479 INFO L225 Difference]: With dead ends: 754 [2021-06-12 20:12:25,479 INFO L226 Difference]: Without dead ends: 745 [2021-06-12 20:12:25,479 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 463.4ms TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:12:25,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-06-12 20:12:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 357. [2021-06-12 20:12:25,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.0) internal successors, (1068), 356 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:25,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1068 transitions. [2021-06-12 20:12:25,486 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1068 transitions. Word has length 22 [2021-06-12 20:12:25,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:25,486 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1068 transitions. [2021-06-12 20:12:25,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:25,486 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1068 transitions. [2021-06-12 20:12:25,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:25,487 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:25,487 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:25,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1089 [2021-06-12 20:12:25,704 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:25,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:25,704 INFO L82 PathProgramCache]: Analyzing trace with hash -931017330, now seen corresponding path program 96 times [2021-06-12 20:12:25,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:25,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566708467] [2021-06-12 20:12:25,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:25,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:25,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566708467] [2021-06-12 20:12:25,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566708467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:25,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534589420] [2021-06-12 20:12:25,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:25,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:12:25,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:25,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:25,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:26,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534589420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:26,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:26,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:12:26,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758363459] [2021-06-12 20:12:26,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:12:26,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:26,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:12:26,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:12:26,048 INFO L87 Difference]: Start difference. First operand 357 states and 1068 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:26,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:26,597 INFO L93 Difference]: Finished difference Result 797 states and 2257 transitions. [2021-06-12 20:12:26,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:12:26,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:26,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:26,599 INFO L225 Difference]: With dead ends: 797 [2021-06-12 20:12:26,599 INFO L226 Difference]: Without dead ends: 787 [2021-06-12 20:12:26,599 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 448.0ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:12:26,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-06-12 20:12:26,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 369. [2021-06-12 20:12:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.005434782608696) internal successors, (1106), 368 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1106 transitions. [2021-06-12 20:12:26,605 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1106 transitions. Word has length 22 [2021-06-12 20:12:26,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:26,605 INFO L482 AbstractCegarLoop]: Abstraction has 369 states and 1106 transitions. [2021-06-12 20:12:26,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:26,606 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1106 transitions. [2021-06-12 20:12:26,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:26,606 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:26,607 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:26,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1103 [2021-06-12 20:12:26,831 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:26,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:26,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1113107642, now seen corresponding path program 97 times [2021-06-12 20:12:26,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:26,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833107880] [2021-06-12 20:12:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:26,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:26,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833107880] [2021-06-12 20:12:26,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833107880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:26,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652812884] [2021-06-12 20:12:26,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:27,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:27,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:27,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652812884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:27,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:27,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:12:27,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164242419] [2021-06-12 20:12:27,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:12:27,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:27,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:12:27,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:12:27,205 INFO L87 Difference]: Start difference. First operand 369 states and 1106 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:27,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:27,702 INFO L93 Difference]: Finished difference Result 711 states and 2049 transitions. [2021-06-12 20:12:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:12:27,702 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:27,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:27,703 INFO L225 Difference]: With dead ends: 711 [2021-06-12 20:12:27,703 INFO L226 Difference]: Without dead ends: 699 [2021-06-12 20:12:27,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 390.4ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:12:27,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-06-12 20:12:27,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 365. [2021-06-12 20:12:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.0054945054945055) internal successors, (1094), 364 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:27,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1094 transitions. [2021-06-12 20:12:27,712 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1094 transitions. Word has length 22 [2021-06-12 20:12:27,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:27,712 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 1094 transitions. [2021-06-12 20:12:27,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:27,712 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1094 transitions. [2021-06-12 20:12:27,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:27,712 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:27,712 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:27,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1114,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:27,936 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:27,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:27,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1304772384, now seen corresponding path program 98 times [2021-06-12 20:12:27,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:27,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699122959] [2021-06-12 20:12:27,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:28,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:28,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699122959] [2021-06-12 20:12:28,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699122959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:28,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216393197] [2021-06-12 20:12:28,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:28,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:12:28,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:28,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:28,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:28,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216393197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:28,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:28,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:28,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775742452] [2021-06-12 20:12:28,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:28,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:28,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:28,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:28,297 INFO L87 Difference]: Start difference. First operand 365 states and 1094 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:28,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:28,796 INFO L93 Difference]: Finished difference Result 689 states and 2001 transitions. [2021-06-12 20:12:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:12:28,796 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:28,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:28,798 INFO L225 Difference]: With dead ends: 689 [2021-06-12 20:12:28,798 INFO L226 Difference]: Without dead ends: 689 [2021-06-12 20:12:28,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 463.1ms TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:12:28,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-06-12 20:12:28,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 370. [2021-06-12 20:12:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.0) internal successors, (1107), 369 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:28,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1107 transitions. [2021-06-12 20:12:28,804 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1107 transitions. Word has length 22 [2021-06-12 20:12:28,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:28,804 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1107 transitions. [2021-06-12 20:12:28,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:28,804 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1107 transitions. [2021-06-12 20:12:28,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:28,805 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:28,805 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:29,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-06-12 20:12:29,022 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:29,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:29,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1495591948, now seen corresponding path program 99 times [2021-06-12 20:12:29,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:29,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595624112] [2021-06-12 20:12:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:29,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:29,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595624112] [2021-06-12 20:12:29,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595624112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:29,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404064816] [2021-06-12 20:12:29,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:29,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:12:29,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:29,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:29,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:29,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404064816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:29,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:29,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:29,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453026810] [2021-06-12 20:12:29,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:29,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:29,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:29,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:29,353 INFO L87 Difference]: Start difference. First operand 370 states and 1107 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:29,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:29,737 INFO L93 Difference]: Finished difference Result 680 states and 1981 transitions. [2021-06-12 20:12:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:12:29,737 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:29,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:29,738 INFO L225 Difference]: With dead ends: 680 [2021-06-12 20:12:29,738 INFO L226 Difference]: Without dead ends: 670 [2021-06-12 20:12:29,739 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 364.7ms TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:29,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-06-12 20:12:29,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 349. [2021-06-12 20:12:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.971264367816092) internal successors, (1034), 348 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1034 transitions. [2021-06-12 20:12:29,744 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1034 transitions. Word has length 22 [2021-06-12 20:12:29,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:29,745 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1034 transitions. [2021-06-12 20:12:29,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:29,745 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1034 transitions. [2021-06-12 20:12:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:29,746 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:29,746 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:29,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:29,965 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:29,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:29,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2041925648, now seen corresponding path program 100 times [2021-06-12 20:12:29,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:29,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732713996] [2021-06-12 20:12:29,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:30,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:30,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:30,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732713996] [2021-06-12 20:12:30,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732713996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:30,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673213066] [2021-06-12 20:12:30,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:30,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:12:30,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:30,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:30,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:30,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673213066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:30,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:30,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:30,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012920904] [2021-06-12 20:12:30,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:30,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:30,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:30,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:30,302 INFO L87 Difference]: Start difference. First operand 349 states and 1034 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:30,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:30,707 INFO L93 Difference]: Finished difference Result 594 states and 1754 transitions. [2021-06-12 20:12:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:12:30,707 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:30,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:30,708 INFO L225 Difference]: With dead ends: 594 [2021-06-12 20:12:30,708 INFO L226 Difference]: Without dead ends: 594 [2021-06-12 20:12:30,708 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 355.3ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:30,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-12 20:12:30,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 346. [2021-06-12 20:12:30,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.971014492753623) internal successors, (1025), 345 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:30,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1025 transitions. [2021-06-12 20:12:30,714 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1025 transitions. Word has length 22 [2021-06-12 20:12:30,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:30,714 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1025 transitions. [2021-06-12 20:12:30,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:30,715 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1025 transitions. [2021-06-12 20:12:30,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:30,715 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:30,715 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:30,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1141,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:30,925 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:30,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:30,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1317993700, now seen corresponding path program 101 times [2021-06-12 20:12:30,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:30,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008887150] [2021-06-12 20:12:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:31,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:31,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008887150] [2021-06-12 20:12:31,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008887150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:31,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963033399] [2021-06-12 20:12:31,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:31,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:12:31,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:31,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:31,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:31,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963033399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:31,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:31,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:31,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544440346] [2021-06-12 20:12:31,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:31,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:31,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:31,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:31,273 INFO L87 Difference]: Start difference. First operand 346 states and 1025 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:31,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:31,778 INFO L93 Difference]: Finished difference Result 655 states and 1884 transitions. [2021-06-12 20:12:31,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:12:31,778 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:31,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:31,779 INFO L225 Difference]: With dead ends: 655 [2021-06-12 20:12:31,779 INFO L226 Difference]: Without dead ends: 655 [2021-06-12 20:12:31,779 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 459.6ms TimeCoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:12:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-12 20:12:31,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 354. [2021-06-12 20:12:31,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.9830028328611897) internal successors, (1053), 353 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1053 transitions. [2021-06-12 20:12:31,785 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1053 transitions. Word has length 22 [2021-06-12 20:12:31,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:31,785 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1053 transitions. [2021-06-12 20:12:31,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:31,785 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1053 transitions. [2021-06-12 20:12:31,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:31,785 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:31,785 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:31,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1148,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:31,999 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:31,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:31,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1464954152, now seen corresponding path program 102 times [2021-06-12 20:12:31,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:31,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682614112] [2021-06-12 20:12:31,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:32,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:32,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682614112] [2021-06-12 20:12:32,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682614112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:32,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471290696] [2021-06-12 20:12:32,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:32,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:12:32,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:32,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:32,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:32,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471290696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:32,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:32,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:32,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459718197] [2021-06-12 20:12:32,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:32,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:32,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:32,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:32,317 INFO L87 Difference]: Start difference. First operand 354 states and 1053 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:32,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:32,708 INFO L93 Difference]: Finished difference Result 622 states and 1795 transitions. [2021-06-12 20:12:32,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:12:32,709 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:32,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:32,710 INFO L225 Difference]: With dead ends: 622 [2021-06-12 20:12:32,710 INFO L226 Difference]: Without dead ends: 613 [2021-06-12 20:12:32,710 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 344.9ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:32,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-12 20:12:32,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 354. [2021-06-12 20:12:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.954674220963173) internal successors, (1043), 353 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1043 transitions. [2021-06-12 20:12:32,729 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1043 transitions. Word has length 22 [2021-06-12 20:12:32,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:32,729 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1043 transitions. [2021-06-12 20:12:32,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1043 transitions. [2021-06-12 20:12:32,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:32,729 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:32,729 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:32,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1155 [2021-06-12 20:12:32,958 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:32,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:32,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1287030692, now seen corresponding path program 103 times [2021-06-12 20:12:32,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:32,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292525626] [2021-06-12 20:12:32,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:33,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:33,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292525626] [2021-06-12 20:12:33,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292525626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:33,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041717386] [2021-06-12 20:12:33,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:33,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:33,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:33,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041717386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:33,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:33,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:33,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322741604] [2021-06-12 20:12:33,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:33,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:33,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:33,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:33,292 INFO L87 Difference]: Start difference. First operand 354 states and 1043 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:33,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:33,711 INFO L93 Difference]: Finished difference Result 565 states and 1664 transitions. [2021-06-12 20:12:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:12:33,711 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:33,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:33,712 INFO L225 Difference]: With dead ends: 565 [2021-06-12 20:12:33,712 INFO L226 Difference]: Without dead ends: 565 [2021-06-12 20:12:33,712 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 394.4ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:33,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-12 20:12:33,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 324. [2021-06-12 20:12:33,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:33,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-12 20:12:33,717 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-12 20:12:33,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:33,719 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-12 20:12:33,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:33,719 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-12 20:12:33,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:33,719 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:33,719 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:33,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:33,933 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:33,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:33,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1437395562, now seen corresponding path program 104 times [2021-06-12 20:12:33,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:33,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064715074] [2021-06-12 20:12:33,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:34,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:34,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064715074] [2021-06-12 20:12:34,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064715074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:34,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809026734] [2021-06-12 20:12:34,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:34,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:12:34,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:34,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:34,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:34,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809026734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:34,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:34,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:34,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085049149] [2021-06-12 20:12:34,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:34,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:34,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:34,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:34,271 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:34,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:34,581 INFO L93 Difference]: Finished difference Result 489 states and 1425 transitions. [2021-06-12 20:12:34,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:12:34,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:34,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:34,583 INFO L225 Difference]: With dead ends: 489 [2021-06-12 20:12:34,583 INFO L226 Difference]: Without dead ends: 489 [2021-06-12 20:12:34,583 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 301.3ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:12:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-12 20:12:34,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 334. [2021-06-12 20:12:34,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.978978978978979) internal successors, (992), 333 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:34,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 992 transitions. [2021-06-12 20:12:34,587 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 992 transitions. Word has length 22 [2021-06-12 20:12:34,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:34,588 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 992 transitions. [2021-06-12 20:12:34,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:34,588 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 992 transitions. [2021-06-12 20:12:34,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:34,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:34,588 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:34,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1170,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:34,797 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:34,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:34,797 INFO L82 PathProgramCache]: Analyzing trace with hash 57207402, now seen corresponding path program 105 times [2021-06-12 20:12:34,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:34,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273091377] [2021-06-12 20:12:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:34,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:34,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273091377] [2021-06-12 20:12:34,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273091377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:34,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998690561] [2021-06-12 20:12:34,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:34,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:12:34,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:34,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:34,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:35,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998690561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:35,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:35,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:35,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205617295] [2021-06-12 20:12:35,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:35,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:35,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:35,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:35,207 INFO L87 Difference]: Start difference. First operand 334 states and 992 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:35,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:35,635 INFO L93 Difference]: Finished difference Result 516 states and 1492 transitions. [2021-06-12 20:12:35,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:12:35,636 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:35,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:35,636 INFO L225 Difference]: With dead ends: 516 [2021-06-12 20:12:35,637 INFO L226 Difference]: Without dead ends: 506 [2021-06-12 20:12:35,637 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 430.9ms TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:12:35,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-12 20:12:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 331. [2021-06-12 20:12:35,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.9696969696969697) internal successors, (980), 330 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:35,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 980 transitions. [2021-06-12 20:12:35,641 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 980 transitions. Word has length 22 [2021-06-12 20:12:35,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:35,641 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 980 transitions. [2021-06-12 20:12:35,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:35,642 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 980 transitions. [2021-06-12 20:12:35,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:35,642 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:35,642 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:35,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1180,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:35,843 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:35,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:35,843 INFO L82 PathProgramCache]: Analyzing trace with hash 482154612, now seen corresponding path program 106 times [2021-06-12 20:12:35,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:35,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519986232] [2021-06-12 20:12:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:35,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:35,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519986232] [2021-06-12 20:12:35,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519986232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:35,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647711648] [2021-06-12 20:12:35,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:35,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:12:35,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:35,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:35,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:36,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647711648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:36,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:36,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:36,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575526347] [2021-06-12 20:12:36,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:36,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:36,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:36,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:36,186 INFO L87 Difference]: Start difference. First operand 331 states and 980 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:36,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:36,493 INFO L93 Difference]: Finished difference Result 477 states and 1390 transitions. [2021-06-12 20:12:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:12:36,493 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:36,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:36,494 INFO L225 Difference]: With dead ends: 477 [2021-06-12 20:12:36,494 INFO L226 Difference]: Without dead ends: 457 [2021-06-12 20:12:36,494 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 329.5ms TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:12:36,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-12 20:12:36,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 328. [2021-06-12 20:12:36,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.9602446483180427) internal successors, (968), 327 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:36,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 968 transitions. [2021-06-12 20:12:36,497 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 968 transitions. Word has length 22 [2021-06-12 20:12:36,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:36,497 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 968 transitions. [2021-06-12 20:12:36,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:36,497 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 968 transitions. [2021-06-12 20:12:36,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:36,498 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:36,498 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:36,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1193,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:36,698 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:36,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:36,699 INFO L82 PathProgramCache]: Analyzing trace with hash -332526258, now seen corresponding path program 107 times [2021-06-12 20:12:36,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:36,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613715396] [2021-06-12 20:12:36,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:36,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:36,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613715396] [2021-06-12 20:12:36,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613715396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:36,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604988814] [2021-06-12 20:12:36,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:36,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:12:36,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:36,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:36,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:36,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604988814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:36,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:36,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:36,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531516414] [2021-06-12 20:12:36,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:36,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:36,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:36,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:36,966 INFO L87 Difference]: Start difference. First operand 328 states and 968 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:37,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:37,309 INFO L93 Difference]: Finished difference Result 607 states and 1761 transitions. [2021-06-12 20:12:37,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:12:37,309 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:37,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:37,310 INFO L225 Difference]: With dead ends: 607 [2021-06-12 20:12:37,310 INFO L226 Difference]: Without dead ends: 607 [2021-06-12 20:12:37,310 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 303.6ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-12 20:12:37,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 338. [2021-06-12 20:12:37,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 3.0118694362017804) internal successors, (1015), 337 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:37,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1015 transitions. [2021-06-12 20:12:37,314 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1015 transitions. Word has length 22 [2021-06-12 20:12:37,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:37,314 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1015 transitions. [2021-06-12 20:12:37,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:37,315 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1015 transitions. [2021-06-12 20:12:37,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:37,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:37,315 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:37,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1201,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:37,516 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:37,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:37,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1162076706, now seen corresponding path program 108 times [2021-06-12 20:12:37,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:37,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773376919] [2021-06-12 20:12:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:37,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:37,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773376919] [2021-06-12 20:12:37,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773376919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:37,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301049009] [2021-06-12 20:12:37,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:37,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:12:37,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:37,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:37,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:37,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:37,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301049009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:37,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:37,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:37,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070329950] [2021-06-12 20:12:37,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:37,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:37,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:37,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:37,868 INFO L87 Difference]: Start difference. First operand 338 states and 1015 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:38,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:38,366 INFO L93 Difference]: Finished difference Result 651 states and 1869 transitions. [2021-06-12 20:12:38,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:12:38,366 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:38,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:38,367 INFO L225 Difference]: With dead ends: 651 [2021-06-12 20:12:38,367 INFO L226 Difference]: Without dead ends: 641 [2021-06-12 20:12:38,367 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 420.4ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:12:38,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-06-12 20:12:38,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 345. [2021-06-12 20:12:38,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.991279069767442) internal successors, (1029), 344 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:38,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1029 transitions. [2021-06-12 20:12:38,372 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1029 transitions. Word has length 22 [2021-06-12 20:12:38,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:38,372 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1029 transitions. [2021-06-12 20:12:38,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1029 transitions. [2021-06-12 20:12:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:38,372 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:38,372 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:38,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-06-12 20:12:38,573 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:38,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:38,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1682358634, now seen corresponding path program 109 times [2021-06-12 20:12:38,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:38,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181680394] [2021-06-12 20:12:38,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:38,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:38,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181680394] [2021-06-12 20:12:38,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181680394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:38,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468436417] [2021-06-12 20:12:38,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:38,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:38,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:38,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468436417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:38,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:38,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:38,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459877603] [2021-06-12 20:12:38,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:38,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:38,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:38,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:38,869 INFO L87 Difference]: Start difference. First operand 345 states and 1029 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:39,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:39,133 INFO L93 Difference]: Finished difference Result 540 states and 1570 transitions. [2021-06-12 20:12:39,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:12:39,133 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:39,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:39,134 INFO L225 Difference]: With dead ends: 540 [2021-06-12 20:12:39,134 INFO L226 Difference]: Without dead ends: 540 [2021-06-12 20:12:39,134 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 258.9ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:12:39,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-12 20:12:39,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 336. [2021-06-12 20:12:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.997014925373134) internal successors, (1004), 335 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1004 transitions. [2021-06-12 20:12:39,138 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1004 transitions. Word has length 22 [2021-06-12 20:12:39,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:39,138 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1004 transitions. [2021-06-12 20:12:39,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:39,138 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1004 transitions. [2021-06-12 20:12:39,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:39,139 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:39,139 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:39,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1221 [2021-06-12 20:12:39,339 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:39,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:39,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1100589218, now seen corresponding path program 110 times [2021-06-12 20:12:39,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:39,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382155619] [2021-06-12 20:12:39,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:39,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:39,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382155619] [2021-06-12 20:12:39,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382155619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:39,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428695383] [2021-06-12 20:12:39,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:39,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:12:39,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:39,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:39,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:39,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428695383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:39,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:39,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:39,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792185077] [2021-06-12 20:12:39,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:39,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:39,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:39,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:39,623 INFO L87 Difference]: Start difference. First operand 336 states and 1004 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:39,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:39,868 INFO L93 Difference]: Finished difference Result 556 states and 1597 transitions. [2021-06-12 20:12:39,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:12:39,868 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:39,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:39,869 INFO L225 Difference]: With dead ends: 556 [2021-06-12 20:12:39,869 INFO L226 Difference]: Without dead ends: 547 [2021-06-12 20:12:39,869 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 252.9ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:12:39,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-12 20:12:39,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 342. [2021-06-12 20:12:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9794721407624634) internal successors, (1016), 341 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1016 transitions. [2021-06-12 20:12:39,873 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1016 transitions. Word has length 22 [2021-06-12 20:12:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:39,873 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1016 transitions. [2021-06-12 20:12:39,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1016 transitions. [2021-06-12 20:12:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:39,874 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:39,874 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:40,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1234 [2021-06-12 20:12:40,076 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:40,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:40,076 INFO L82 PathProgramCache]: Analyzing trace with hash 878028852, now seen corresponding path program 111 times [2021-06-12 20:12:40,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:40,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792619986] [2021-06-12 20:12:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:40,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:40,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792619986] [2021-06-12 20:12:40,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792619986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:40,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136301550] [2021-06-12 20:12:40,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:40,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:12:40,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:40,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:40,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:40,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136301550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:40,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:40,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:12:40,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820415621] [2021-06-12 20:12:40,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:12:40,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:40,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:12:40,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:12:40,453 INFO L87 Difference]: Start difference. First operand 342 states and 1016 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:41,596 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-06-12 20:12:41,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:41,621 INFO L93 Difference]: Finished difference Result 616 states and 1742 transitions. [2021-06-12 20:12:41,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:12:41,622 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:41,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:41,623 INFO L225 Difference]: With dead ends: 616 [2021-06-12 20:12:41,623 INFO L226 Difference]: Without dead ends: 606 [2021-06-12 20:12:41,623 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1059.6ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:41,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-12 20:12:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 364. [2021-06-12 20:12:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.975206611570248) internal successors, (1080), 363 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1080 transitions. [2021-06-12 20:12:41,630 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1080 transitions. Word has length 22 [2021-06-12 20:12:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:41,630 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 1080 transitions. [2021-06-12 20:12:41,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:41,630 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1080 transitions. [2021-06-12 20:12:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:41,631 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:41,631 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:41,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1246 [2021-06-12 20:12:41,845 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:41,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:41,845 INFO L82 PathProgramCache]: Analyzing trace with hash 695938540, now seen corresponding path program 112 times [2021-06-12 20:12:41,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:41,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986282977] [2021-06-12 20:12:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:41,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:41,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986282977] [2021-06-12 20:12:41,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986282977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:41,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500761043] [2021-06-12 20:12:41,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:42,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:12:42,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:42,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:42,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:42,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500761043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:42,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:42,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:12:42,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990367357] [2021-06-12 20:12:42,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:12:42,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:42,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:12:42,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:12:42,196 INFO L87 Difference]: Start difference. First operand 364 states and 1080 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:42,622 INFO L93 Difference]: Finished difference Result 606 states and 1703 transitions. [2021-06-12 20:12:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:12:42,623 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:42,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:42,624 INFO L225 Difference]: With dead ends: 606 [2021-06-12 20:12:42,624 INFO L226 Difference]: Without dead ends: 594 [2021-06-12 20:12:42,624 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 429.7ms TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:12:42,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-12 20:12:42,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 344. [2021-06-12 20:12:42,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.9737609329446064) internal successors, (1020), 343 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1020 transitions. [2021-06-12 20:12:42,630 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1020 transitions. Word has length 22 [2021-06-12 20:12:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:42,630 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1020 transitions. [2021-06-12 20:12:42,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:42,630 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1020 transitions. [2021-06-12 20:12:42,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:42,631 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:42,631 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:42,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-06-12 20:12:42,853 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:42,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:42,853 INFO L82 PathProgramCache]: Analyzing trace with hash 266605730, now seen corresponding path program 113 times [2021-06-12 20:12:42,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:42,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131960580] [2021-06-12 20:12:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:42,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:42,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131960580] [2021-06-12 20:12:42,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131960580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:42,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623417288] [2021-06-12 20:12:42,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:43,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:12:43,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:43,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:43,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:43,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623417288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:43,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:43,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:43,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005081707] [2021-06-12 20:12:43,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:43,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:43,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:43,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:43,206 INFO L87 Difference]: Start difference. First operand 344 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:43,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:43,653 INFO L93 Difference]: Finished difference Result 474 states and 1386 transitions. [2021-06-12 20:12:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:12:43,653 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:43,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:43,654 INFO L225 Difference]: With dead ends: 474 [2021-06-12 20:12:43,654 INFO L226 Difference]: Without dead ends: 454 [2021-06-12 20:12:43,654 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 409.2ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:12:43,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-12 20:12:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 350. [2021-06-12 20:12:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.9598853868194843) internal successors, (1033), 349 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1033 transitions. [2021-06-12 20:12:43,659 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1033 transitions. Word has length 22 [2021-06-12 20:12:43,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:43,659 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1033 transitions. [2021-06-12 20:12:43,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:43,659 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1033 transitions. [2021-06-12 20:12:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:43,659 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:43,659 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:43,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:43,882 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:43,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:43,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1083226646, now seen corresponding path program 114 times [2021-06-12 20:12:43,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:43,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888544619] [2021-06-12 20:12:43,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:43,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:43,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888544619] [2021-06-12 20:12:43,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888544619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:43,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261306024] [2021-06-12 20:12:43,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:44,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:12:44,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:44,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:44,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:44,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261306024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:44,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:44,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:12:44,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772614391] [2021-06-12 20:12:44,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:12:44,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:44,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:12:44,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:12:44,170 INFO L87 Difference]: Start difference. First operand 350 states and 1033 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:44,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:44,548 INFO L93 Difference]: Finished difference Result 552 states and 1564 transitions. [2021-06-12 20:12:44,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:12:44,548 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:44,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:44,549 INFO L225 Difference]: With dead ends: 552 [2021-06-12 20:12:44,549 INFO L226 Difference]: Without dead ends: 542 [2021-06-12 20:12:44,549 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 310.8ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:44,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-12 20:12:44,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 372. [2021-06-12 20:12:44,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.9568733153638815) internal successors, (1097), 371 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1097 transitions. [2021-06-12 20:12:44,553 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1097 transitions. Word has length 22 [2021-06-12 20:12:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:44,553 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1097 transitions. [2021-06-12 20:12:44,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:44,553 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1097 transitions. [2021-06-12 20:12:44,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:44,554 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:44,554 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:44,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1280 [2021-06-12 20:12:44,755 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:44,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:44,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1265316958, now seen corresponding path program 115 times [2021-06-12 20:12:44,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:44,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957002911] [2021-06-12 20:12:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:44,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:44,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957002911] [2021-06-12 20:12:44,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957002911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:44,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715128139] [2021-06-12 20:12:44,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:44,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:44,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:45,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715128139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:45,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:45,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:12:45,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354823029] [2021-06-12 20:12:45,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:12:45,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:45,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:12:45,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:12:45,061 INFO L87 Difference]: Start difference. First operand 372 states and 1097 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:45,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:45,399 INFO L93 Difference]: Finished difference Result 509 states and 1453 transitions. [2021-06-12 20:12:45,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:12:45,400 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:45,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:45,400 INFO L225 Difference]: With dead ends: 509 [2021-06-12 20:12:45,400 INFO L226 Difference]: Without dead ends: 494 [2021-06-12 20:12:45,401 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 286.8ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:12:45,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-12 20:12:45,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 346. [2021-06-12 20:12:45,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.9681159420289855) internal successors, (1024), 345 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:45,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1024 transitions. [2021-06-12 20:12:45,406 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1024 transitions. Word has length 22 [2021-06-12 20:12:45,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:45,406 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1024 transitions. [2021-06-12 20:12:45,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:45,406 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1024 transitions. [2021-06-12 20:12:45,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:45,406 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:45,407 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:45,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:45,631 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:45,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:45,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1974888418, now seen corresponding path program 116 times [2021-06-12 20:12:45,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:45,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426517085] [2021-06-12 20:12:45,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:45,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:45,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426517085] [2021-06-12 20:12:45,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426517085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:45,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376565848] [2021-06-12 20:12:45,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:45,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:12:45,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:45,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:45,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:46,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376565848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:46,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:46,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:46,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686040435] [2021-06-12 20:12:46,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:46,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:46,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:46,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:46,106 INFO L87 Difference]: Start difference. First operand 346 states and 1024 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:46,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:46,357 INFO L93 Difference]: Finished difference Result 472 states and 1360 transitions. [2021-06-12 20:12:46,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:12:46,358 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:46,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:46,358 INFO L225 Difference]: With dead ends: 472 [2021-06-12 20:12:46,358 INFO L226 Difference]: Without dead ends: 472 [2021-06-12 20:12:46,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:12:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-12 20:12:46,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 349. [2021-06-12 20:12:46,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.954022988505747) internal successors, (1028), 348 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:46,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1028 transitions. [2021-06-12 20:12:46,362 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1028 transitions. Word has length 22 [2021-06-12 20:12:46,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:46,362 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1028 transitions. [2021-06-12 20:12:46,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:46,362 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1028 transitions. [2021-06-12 20:12:46,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:46,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:46,363 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:46,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1301 [2021-06-12 20:12:46,564 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:46,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:46,564 INFO L82 PathProgramCache]: Analyzing trace with hash -480285454, now seen corresponding path program 117 times [2021-06-12 20:12:46,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:46,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138051862] [2021-06-12 20:12:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:46,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:46,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138051862] [2021-06-12 20:12:46,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138051862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:46,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738753195] [2021-06-12 20:12:46,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:46,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:12:46,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:46,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:46,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:46,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738753195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:46,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:46,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:46,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008187597] [2021-06-12 20:12:46,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:46,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:46,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:46,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:46,880 INFO L87 Difference]: Start difference. First operand 349 states and 1028 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:47,223 INFO L93 Difference]: Finished difference Result 499 states and 1424 transitions. [2021-06-12 20:12:47,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:12:47,223 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:47,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:47,224 INFO L225 Difference]: With dead ends: 499 [2021-06-12 20:12:47,224 INFO L226 Difference]: Without dead ends: 489 [2021-06-12 20:12:47,224 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 299.1ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:12:47,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-12 20:12:47,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 346. [2021-06-12 20:12:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.944927536231884) internal successors, (1016), 345 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:47,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1016 transitions. [2021-06-12 20:12:47,229 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1016 transitions. Word has length 22 [2021-06-12 20:12:47,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:47,229 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1016 transitions. [2021-06-12 20:12:47,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1016 transitions. [2021-06-12 20:12:47,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:47,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:47,230 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:47,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1306 [2021-06-12 20:12:47,443 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:47,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:47,443 INFO L82 PathProgramCache]: Analyzing trace with hash -55338244, now seen corresponding path program 118 times [2021-06-12 20:12:47,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:47,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766601887] [2021-06-12 20:12:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:47,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:47,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766601887] [2021-06-12 20:12:47,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766601887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:47,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484808060] [2021-06-12 20:12:47,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:47,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:12:47,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:47,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:47,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:47,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484808060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:47,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:47,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:47,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982576804] [2021-06-12 20:12:47,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:47,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:47,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:47,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:47,739 INFO L87 Difference]: Start difference. First operand 346 states and 1016 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:48,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:48,052 INFO L93 Difference]: Finished difference Result 450 states and 1308 transitions. [2021-06-12 20:12:48,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:12:48,052 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:48,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:48,053 INFO L225 Difference]: With dead ends: 450 [2021-06-12 20:12:48,053 INFO L226 Difference]: Without dead ends: 430 [2021-06-12 20:12:48,053 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:12:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-12 20:12:48,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 328. [2021-06-12 20:12:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.948012232415902) internal successors, (964), 327 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:48,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 964 transitions. [2021-06-12 20:12:48,058 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 964 transitions. Word has length 22 [2021-06-12 20:12:48,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:48,058 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 964 transitions. [2021-06-12 20:12:48,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 964 transitions. [2021-06-12 20:12:48,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:48,059 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:48,059 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:48,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1312 [2021-06-12 20:12:48,282 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:48,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:48,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1651654990, now seen corresponding path program 119 times [2021-06-12 20:12:48,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:48,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309952346] [2021-06-12 20:12:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:48,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:48,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309952346] [2021-06-12 20:12:48,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309952346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:48,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510132329] [2021-06-12 20:12:48,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:48,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:12:48,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:48,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:48,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:48,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510132329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:48,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:48,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:48,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342289379] [2021-06-12 20:12:48,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:48,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:48,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:48,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:48,614 INFO L87 Difference]: Start difference. First operand 328 states and 964 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:49,212 INFO L93 Difference]: Finished difference Result 531 states and 1544 transitions. [2021-06-12 20:12:49,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:12:49,213 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:49,214 INFO L225 Difference]: With dead ends: 531 [2021-06-12 20:12:49,214 INFO L226 Difference]: Without dead ends: 531 [2021-06-12 20:12:49,214 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:12:49,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-12 20:12:49,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 340. [2021-06-12 20:12:49,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.9852507374631267) internal successors, (1012), 339 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1012 transitions. [2021-06-12 20:12:49,219 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1012 transitions. Word has length 22 [2021-06-12 20:12:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:49,219 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1012 transitions. [2021-06-12 20:12:49,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1012 transitions. [2021-06-12 20:12:49,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:49,219 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:49,219 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:49,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1316,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:49,433 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:49,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:49,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1148709342, now seen corresponding path program 120 times [2021-06-12 20:12:49,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:49,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818441456] [2021-06-12 20:12:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:49,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:49,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818441456] [2021-06-12 20:12:49,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818441456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:49,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974707610] [2021-06-12 20:12:49,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:49,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:12:49,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:49,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:49,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:49,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974707610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:49,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:49,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:49,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354397097] [2021-06-12 20:12:49,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:49,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:49,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:49,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:49,787 INFO L87 Difference]: Start difference. First operand 340 states and 1012 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:50,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:50,123 INFO L93 Difference]: Finished difference Result 503 states and 1458 transitions. [2021-06-12 20:12:50,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:12:50,123 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:50,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:50,124 INFO L225 Difference]: With dead ends: 503 [2021-06-12 20:12:50,124 INFO L226 Difference]: Without dead ends: 493 [2021-06-12 20:12:50,124 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 311.8ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:12:50,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-12 20:12:50,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 347. [2021-06-12 20:12:50,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.9653179190751446) internal successors, (1026), 346 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1026 transitions. [2021-06-12 20:12:50,129 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1026 transitions. Word has length 22 [2021-06-12 20:12:50,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:50,129 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1026 transitions. [2021-06-12 20:12:50,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:50,129 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1026 transitions. [2021-06-12 20:12:50,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:50,130 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:50,130 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:50,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1322 [2021-06-12 20:12:50,341 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:50,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:50,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1467821662, now seen corresponding path program 121 times [2021-06-12 20:12:50,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:50,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432812350] [2021-06-12 20:12:50,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:50,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:50,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:50,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432812350] [2021-06-12 20:12:50,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432812350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:50,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566615661] [2021-06-12 20:12:50,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:50,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:50,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:50,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566615661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:50,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:50,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:50,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387866267] [2021-06-12 20:12:50,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:50,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:50,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:50,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:50,667 INFO L87 Difference]: Start difference. First operand 347 states and 1026 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:50,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:50,930 INFO L93 Difference]: Finished difference Result 431 states and 1272 transitions. [2021-06-12 20:12:50,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:12:50,931 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:50,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:50,932 INFO L225 Difference]: With dead ends: 431 [2021-06-12 20:12:50,932 INFO L226 Difference]: Without dead ends: 431 [2021-06-12 20:12:50,932 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:12:50,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-12 20:12:50,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 325. [2021-06-12 20:12:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.947530864197531) internal successors, (955), 324 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:50,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 955 transitions. [2021-06-12 20:12:50,937 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 955 transitions. Word has length 22 [2021-06-12 20:12:50,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:50,937 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 955 transitions. [2021-06-12 20:12:50,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:50,937 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 955 transitions. [2021-06-12 20:12:50,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:50,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:50,938 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:51,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:51,154 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:51,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1676258398, now seen corresponding path program 122 times [2021-06-12 20:12:51,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:51,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387244271] [2021-06-12 20:12:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:51,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:51,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:51,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387244271] [2021-06-12 20:12:51,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387244271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:51,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527159355] [2021-06-12 20:12:51,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:51,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:12:51,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:51,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:51,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:51,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527159355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:51,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:51,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:51,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481322357] [2021-06-12 20:12:51,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:51,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:51,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:51,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:51,536 INFO L87 Difference]: Start difference. First operand 325 states and 955 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:51,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:51,925 INFO L93 Difference]: Finished difference Result 688 states and 1965 transitions. [2021-06-12 20:12:51,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:12:51,925 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:51,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:51,926 INFO L225 Difference]: With dead ends: 688 [2021-06-12 20:12:51,927 INFO L226 Difference]: Without dead ends: 688 [2021-06-12 20:12:51,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 416.7ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:51,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-12 20:12:51,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 339. [2021-06-12 20:12:51,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 3.0118343195266273) internal successors, (1018), 338 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1018 transitions. [2021-06-12 20:12:51,933 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1018 transitions. Word has length 22 [2021-06-12 20:12:51,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:51,933 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1018 transitions. [2021-06-12 20:12:51,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1018 transitions. [2021-06-12 20:12:51,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:51,933 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:51,934 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:52,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1331 [2021-06-12 20:12:52,149 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:52,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:52,149 INFO L82 PathProgramCache]: Analyzing trace with hash -181655434, now seen corresponding path program 123 times [2021-06-12 20:12:52,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:52,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078397012] [2021-06-12 20:12:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:52,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:52,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078397012] [2021-06-12 20:12:52,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078397012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:52,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223117791] [2021-06-12 20:12:52,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:52,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:12:52,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:52,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:52,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:52,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223117791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:52,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:52,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:52,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357757217] [2021-06-12 20:12:52,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:52,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:52,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:52,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:52,796 INFO L87 Difference]: Start difference. First operand 339 states and 1018 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:53,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:53,074 INFO L93 Difference]: Finished difference Result 627 states and 1798 transitions. [2021-06-12 20:12:53,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:12:53,075 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:53,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:53,075 INFO L225 Difference]: With dead ends: 627 [2021-06-12 20:12:53,075 INFO L226 Difference]: Without dead ends: 617 [2021-06-12 20:12:53,075 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 455.7ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:12:53,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-06-12 20:12:53,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 346. [2021-06-12 20:12:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.991304347826087) internal successors, (1032), 345 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:53,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1032 transitions. [2021-06-12 20:12:53,080 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1032 transitions. Word has length 22 [2021-06-12 20:12:53,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:53,080 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1032 transitions. [2021-06-12 20:12:53,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:53,080 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1032 transitions. [2021-06-12 20:12:53,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:53,080 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:53,080 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:53,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1342 [2021-06-12 20:12:53,281 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:53,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:53,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1268876522, now seen corresponding path program 124 times [2021-06-12 20:12:53,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:53,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009816424] [2021-06-12 20:12:53,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:53,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:53,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009816424] [2021-06-12 20:12:53,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009816424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:53,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178496296] [2021-06-12 20:12:53,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:53,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:12:53,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:53,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:53,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:53,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178496296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:53,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:53,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:53,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686286588] [2021-06-12 20:12:53,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:53,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:53,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:53,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:53,582 INFO L87 Difference]: Start difference. First operand 346 states and 1032 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:53,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:53,788 INFO L93 Difference]: Finished difference Result 621 states and 1807 transitions. [2021-06-12 20:12:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:12:53,788 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:53,789 INFO L225 Difference]: With dead ends: 621 [2021-06-12 20:12:53,789 INFO L226 Difference]: Without dead ends: 621 [2021-06-12 20:12:53,789 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:12:53,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-12 20:12:53,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 352. [2021-06-12 20:12:53,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 3.017094017094017) internal successors, (1059), 351 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1059 transitions. [2021-06-12 20:12:53,794 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1059 transitions. Word has length 22 [2021-06-12 20:12:53,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:53,794 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1059 transitions. [2021-06-12 20:12:53,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:53,794 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1059 transitions. [2021-06-12 20:12:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:53,794 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:53,794 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:53,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1354 [2021-06-12 20:12:53,995 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:53,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:53,995 INFO L82 PathProgramCache]: Analyzing trace with hash -243142922, now seen corresponding path program 125 times [2021-06-12 20:12:53,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:53,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722748447] [2021-06-12 20:12:53,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:54,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:54,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722748447] [2021-06-12 20:12:54,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722748447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:54,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499285182] [2021-06-12 20:12:54,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:54,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:12:54,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:54,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:54,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:54,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499285182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:54,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:54,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:54,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740271896] [2021-06-12 20:12:54,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:54,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:54,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:54,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:54,293 INFO L87 Difference]: Start difference. First operand 352 states and 1059 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:54,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:54,585 INFO L93 Difference]: Finished difference Result 637 states and 1834 transitions. [2021-06-12 20:12:54,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:12:54,585 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:54,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:54,586 INFO L225 Difference]: With dead ends: 637 [2021-06-12 20:12:54,586 INFO L226 Difference]: Without dead ends: 628 [2021-06-12 20:12:54,586 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 263.9ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:12:54,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-12 20:12:54,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 358. [2021-06-12 20:12:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 3.0) internal successors, (1071), 357 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:54,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1071 transitions. [2021-06-12 20:12:54,590 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1071 transitions. Word has length 22 [2021-06-12 20:12:54,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:54,590 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 1071 transitions. [2021-06-12 20:12:54,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:54,591 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1071 transitions. [2021-06-12 20:12:54,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:54,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:54,591 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:54,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1367 [2021-06-12 20:12:54,791 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:54,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:54,792 INFO L82 PathProgramCache]: Analyzing trace with hash -465703288, now seen corresponding path program 126 times [2021-06-12 20:12:54,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:54,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088425803] [2021-06-12 20:12:54,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:54,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:54,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:54,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088425803] [2021-06-12 20:12:54,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088425803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:54,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744952842] [2021-06-12 20:12:54,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:54,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:12:54,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:54,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:54,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:55,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744952842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:55,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:55,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:12:55,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297917540] [2021-06-12 20:12:55,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:12:55,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:55,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:12:55,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:12:55,085 INFO L87 Difference]: Start difference. First operand 358 states and 1071 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:55,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:55,414 INFO L93 Difference]: Finished difference Result 592 states and 1704 transitions. [2021-06-12 20:12:55,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:12:55,414 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:55,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:55,415 INFO L225 Difference]: With dead ends: 592 [2021-06-12 20:12:55,415 INFO L226 Difference]: Without dead ends: 582 [2021-06-12 20:12:55,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:12:55,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-06-12 20:12:55,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 370. [2021-06-12 20:12:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.005420054200542) internal successors, (1109), 369 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1109 transitions. [2021-06-12 20:12:55,419 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1109 transitions. Word has length 22 [2021-06-12 20:12:55,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:55,419 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1109 transitions. [2021-06-12 20:12:55,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:55,419 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1109 transitions. [2021-06-12 20:12:55,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:55,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:55,420 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:55,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1378 [2021-06-12 20:12:55,620 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:55,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:55,621 INFO L82 PathProgramCache]: Analyzing trace with hash -647793600, now seen corresponding path program 127 times [2021-06-12 20:12:55,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:55,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198415008] [2021-06-12 20:12:55,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:55,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:55,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198415008] [2021-06-12 20:12:55,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198415008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:55,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666070182] [2021-06-12 20:12:55,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:55,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:55,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:55,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:55,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666070182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:55,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:55,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:12:55,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42419749] [2021-06-12 20:12:55,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:12:55,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:55,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:12:55,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:12:55,935 INFO L87 Difference]: Start difference. First operand 370 states and 1109 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:56,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:56,251 INFO L93 Difference]: Finished difference Result 623 states and 1767 transitions. [2021-06-12 20:12:56,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:12:56,252 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:56,252 INFO L225 Difference]: With dead ends: 623 [2021-06-12 20:12:56,252 INFO L226 Difference]: Without dead ends: 611 [2021-06-12 20:12:56,253 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 262.5ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:12:56,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-12 20:12:56,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 366. [2021-06-12 20:12:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.0054794520547947) internal successors, (1097), 365 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:56,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1097 transitions. [2021-06-12 20:12:56,257 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1097 transitions. Word has length 22 [2021-06-12 20:12:56,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:56,257 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1097 transitions. [2021-06-12 20:12:56,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:56,257 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1097 transitions. [2021-06-12 20:12:56,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:56,258 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:56,258 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:56,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1391,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:56,458 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:56,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:56,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1770086426, now seen corresponding path program 128 times [2021-06-12 20:12:56,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:56,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290827086] [2021-06-12 20:12:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:56,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:56,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290827086] [2021-06-12 20:12:56,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290827086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:56,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670973348] [2021-06-12 20:12:56,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:56,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:12:56,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:56,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:56,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:56,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670973348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:56,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:56,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:56,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175311601] [2021-06-12 20:12:56,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:56,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:56,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:56,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:56,757 INFO L87 Difference]: Start difference. First operand 366 states and 1097 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:57,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:57,086 INFO L93 Difference]: Finished difference Result 571 states and 1657 transitions. [2021-06-12 20:12:57,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:12:57,087 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:57,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:57,088 INFO L225 Difference]: With dead ends: 571 [2021-06-12 20:12:57,088 INFO L226 Difference]: Without dead ends: 571 [2021-06-12 20:12:57,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 320.1ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:12:57,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-12 20:12:57,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 371. [2021-06-12 20:12:57,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 3.0) internal successors, (1110), 370 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1110 transitions. [2021-06-12 20:12:57,092 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1110 transitions. Word has length 22 [2021-06-12 20:12:57,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:57,092 INFO L482 AbstractCegarLoop]: Abstraction has 371 states and 1110 transitions. [2021-06-12 20:12:57,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:57,092 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1110 transitions. [2021-06-12 20:12:57,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:57,093 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:57,093 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:57,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1400 [2021-06-12 20:12:57,293 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:57,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:57,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1030277906, now seen corresponding path program 129 times [2021-06-12 20:12:57,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:57,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345887241] [2021-06-12 20:12:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:57,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:57,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345887241] [2021-06-12 20:12:57,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345887241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:57,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607681652] [2021-06-12 20:12:57,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:57,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:12:57,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:57,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:57,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:57,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607681652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:57,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:57,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:57,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612218736] [2021-06-12 20:12:57,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:57,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:57,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:57,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:57,630 INFO L87 Difference]: Start difference. First operand 371 states and 1110 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:57,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:57,900 INFO L93 Difference]: Finished difference Result 543 states and 1580 transitions. [2021-06-12 20:12:57,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:12:57,901 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:57,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:57,902 INFO L225 Difference]: With dead ends: 543 [2021-06-12 20:12:57,902 INFO L226 Difference]: Without dead ends: 533 [2021-06-12 20:12:57,902 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:12:57,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-12 20:12:57,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 350. [2021-06-12 20:12:57,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.9713467048710602) internal successors, (1037), 349 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:57,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1037 transitions. [2021-06-12 20:12:57,907 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1037 transitions. Word has length 22 [2021-06-12 20:12:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:57,933 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1037 transitions. [2021-06-12 20:12:57,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:57,933 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1037 transitions. [2021-06-12 20:12:57,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:57,933 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:57,933 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:58,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1409,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:58,134 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:58,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:58,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1576611606, now seen corresponding path program 130 times [2021-06-12 20:12:58,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:58,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758751833] [2021-06-12 20:12:58,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:58,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:58,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758751833] [2021-06-12 20:12:58,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758751833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:58,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514497591] [2021-06-12 20:12:58,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:58,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:12:58,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:58,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:58,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:58,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514497591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:58,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:58,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:58,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218118414] [2021-06-12 20:12:58,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:58,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:58,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:58,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:58,488 INFO L87 Difference]: Start difference. First operand 350 states and 1037 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:58,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:58,844 INFO L93 Difference]: Finished difference Result 476 states and 1410 transitions. [2021-06-12 20:12:58,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:12:58,845 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:58,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:58,845 INFO L225 Difference]: With dead ends: 476 [2021-06-12 20:12:58,845 INFO L226 Difference]: Without dead ends: 476 [2021-06-12 20:12:58,846 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 319.5ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:12:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-12 20:12:58,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 347. [2021-06-12 20:12:58,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.9710982658959537) internal successors, (1028), 346 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:58,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1028 transitions. [2021-06-12 20:12:58,850 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1028 transitions. Word has length 22 [2021-06-12 20:12:58,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:58,850 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1028 transitions. [2021-06-12 20:12:58,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:58,851 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1028 transitions. [2021-06-12 20:12:58,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:58,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:58,851 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:59,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1418,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:59,074 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:59,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:59,075 INFO L82 PathProgramCache]: Analyzing trace with hash -852679658, now seen corresponding path program 131 times [2021-06-12 20:12:59,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:59,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142989816] [2021-06-12 20:12:59,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:12:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:59,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:12:59,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142989816] [2021-06-12 20:12:59,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142989816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:59,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984696599] [2021-06-12 20:12:59,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:12:59,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:12:59,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:12:59,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:12:59,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:12:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:12:59,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984696599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:12:59,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:12:59,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:12:59,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376650831] [2021-06-12 20:12:59,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:12:59,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:12:59,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:12:59,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:12:59,444 INFO L87 Difference]: Start difference. First operand 347 states and 1028 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:59,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:12:59,717 INFO L93 Difference]: Finished difference Result 525 states and 1504 transitions. [2021-06-12 20:12:59,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:12:59,717 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:12:59,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:12:59,718 INFO L225 Difference]: With dead ends: 525 [2021-06-12 20:12:59,718 INFO L226 Difference]: Without dead ends: 525 [2021-06-12 20:12:59,718 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 309.5ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:12:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-12 20:12:59,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 355. [2021-06-12 20:12:59,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.983050847457627) internal successors, (1056), 354 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:59,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1056 transitions. [2021-06-12 20:12:59,723 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1056 transitions. Word has length 22 [2021-06-12 20:12:59,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:12:59,724 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1056 transitions. [2021-06-12 20:12:59,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:12:59,724 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1056 transitions. [2021-06-12 20:12:59,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:12:59,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:12:59,724 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:12:59,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1422 [2021-06-12 20:12:59,944 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:12:59,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:12:59,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1930268194, now seen corresponding path program 132 times [2021-06-12 20:12:59,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:12:59,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550743770] [2021-06-12 20:12:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:12:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:00,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:00,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550743770] [2021-06-12 20:13:00,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550743770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:00,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942386172] [2021-06-12 20:13:00,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:00,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:13:00,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:00,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:00,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:00,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942386172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:00,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:00,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:00,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482534045] [2021-06-12 20:13:00,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:00,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:00,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:00,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:00,274 INFO L87 Difference]: Start difference. First operand 355 states and 1056 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:00,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:00,628 INFO L93 Difference]: Finished difference Result 496 states and 1427 transitions. [2021-06-12 20:13:00,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:00,629 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:00,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:00,630 INFO L225 Difference]: With dead ends: 496 [2021-06-12 20:13:00,630 INFO L226 Difference]: Without dead ends: 487 [2021-06-12 20:13:00,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 323.8ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:13:00,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-12 20:13:00,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 355. [2021-06-12 20:13:00,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.9548022598870056) internal successors, (1046), 354 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:00,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1046 transitions. [2021-06-12 20:13:00,635 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1046 transitions. Word has length 22 [2021-06-12 20:13:00,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:00,635 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1046 transitions. [2021-06-12 20:13:00,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:00,635 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1046 transitions. [2021-06-12 20:13:00,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:00,635 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:00,635 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:00,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1430 [2021-06-12 20:13:00,849 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:00,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:00,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1752344734, now seen corresponding path program 133 times [2021-06-12 20:13:00,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:00,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601123802] [2021-06-12 20:13:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:00,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:00,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601123802] [2021-06-12 20:13:00,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601123802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:00,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880503313] [2021-06-12 20:13:00,937 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:01,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:01,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:01,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880503313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:01,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:01,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:01,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582284345] [2021-06-12 20:13:01,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:01,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:01,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:01,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:01,214 INFO L87 Difference]: Start difference. First operand 355 states and 1046 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:01,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:01,508 INFO L93 Difference]: Finished difference Result 435 states and 1284 transitions. [2021-06-12 20:13:01,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:01,508 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:01,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:01,509 INFO L225 Difference]: With dead ends: 435 [2021-06-12 20:13:01,509 INFO L226 Difference]: Without dead ends: 435 [2021-06-12 20:13:01,509 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 299.1ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:13:01,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-12 20:13:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 324. [2021-06-12 20:13:01,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:01,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-12 20:13:01,514 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-12 20:13:01,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:01,514 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-12 20:13:01,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:01,514 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-12 20:13:01,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:01,514 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:01,514 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:01,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1441 [2021-06-12 20:13:01,739 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:01,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:01,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1705035186, now seen corresponding path program 134 times [2021-06-12 20:13:01,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:01,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170548632] [2021-06-12 20:13:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:01,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:01,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:01,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170548632] [2021-06-12 20:13:01,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170548632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:01,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658762216] [2021-06-12 20:13:01,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:01,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:13:01,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:01,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:01,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:02,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658762216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:02,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:02,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:02,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032833662] [2021-06-12 20:13:02,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:02,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:02,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:02,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:02,119 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:02,362 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 21 [2021-06-12 20:13:02,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:02,591 INFO L93 Difference]: Finished difference Result 750 states and 2186 transitions. [2021-06-12 20:13:02,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:02,591 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:02,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:02,592 INFO L225 Difference]: With dead ends: 750 [2021-06-12 20:13:02,592 INFO L226 Difference]: Without dead ends: 750 [2021-06-12 20:13:02,592 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 502.7ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:13:02,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-06-12 20:13:02,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 344. [2021-06-12 20:13:02,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.008746355685131) internal successors, (1032), 343 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:02,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1032 transitions. [2021-06-12 20:13:02,600 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1032 transitions. Word has length 22 [2021-06-12 20:13:02,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:02,600 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1032 transitions. [2021-06-12 20:13:02,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:02,601 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1032 transitions. [2021-06-12 20:13:02,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:02,601 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:02,601 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:02,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1448 [2021-06-12 20:13:02,821 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:02,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:02,821 INFO L82 PathProgramCache]: Analyzing trace with hash -210432222, now seen corresponding path program 135 times [2021-06-12 20:13:02,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:02,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357003897] [2021-06-12 20:13:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:02,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:02,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:02,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357003897] [2021-06-12 20:13:02,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357003897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:02,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642135948] [2021-06-12 20:13:02,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:02,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:13:02,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:02,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:02,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:03,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642135948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:03,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:03,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:03,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581916937] [2021-06-12 20:13:03,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:03,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:03,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:03,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:03,189 INFO L87 Difference]: Start difference. First operand 344 states and 1032 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:03,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:03,904 INFO L93 Difference]: Finished difference Result 773 states and 2241 transitions. [2021-06-12 20:13:03,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:13:03,905 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:03,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:03,906 INFO L225 Difference]: With dead ends: 773 [2021-06-12 20:13:03,906 INFO L226 Difference]: Without dead ends: 763 [2021-06-12 20:13:03,906 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 664.6ms TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:13:03,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-06-12 20:13:03,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 341. [2021-06-12 20:13:03,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.0) internal successors, (1020), 340 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:03,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1020 transitions. [2021-06-12 20:13:03,912 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1020 transitions. Word has length 22 [2021-06-12 20:13:03,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:03,912 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1020 transitions. [2021-06-12 20:13:03,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1020 transitions. [2021-06-12 20:13:03,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:03,913 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:03,913 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:04,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-06-12 20:13:04,137 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:04,137 INFO L82 PathProgramCache]: Analyzing trace with hash 214514988, now seen corresponding path program 136 times [2021-06-12 20:13:04,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:04,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492346156] [2021-06-12 20:13:04,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:04,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:04,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492346156] [2021-06-12 20:13:04,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492346156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:04,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339607674] [2021-06-12 20:13:04,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:04,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:13:04,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:04,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:04,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:04,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339607674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:04,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:04,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:04,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836787120] [2021-06-12 20:13:04,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:04,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:04,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:04,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:04,662 INFO L87 Difference]: Start difference. First operand 341 states and 1020 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:05,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:05,158 INFO L93 Difference]: Finished difference Result 747 states and 2178 transitions. [2021-06-12 20:13:05,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:13:05,159 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:05,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:05,160 INFO L225 Difference]: With dead ends: 747 [2021-06-12 20:13:05,160 INFO L226 Difference]: Without dead ends: 727 [2021-06-12 20:13:05,160 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 560.6ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:13:05,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-06-12 20:13:05,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 338. [2021-06-12 20:13:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9910979228486645) internal successors, (1008), 337 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:05,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1008 transitions. [2021-06-12 20:13:05,173 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1008 transitions. Word has length 22 [2021-06-12 20:13:05,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:05,173 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1008 transitions. [2021-06-12 20:13:05,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:05,173 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1008 transitions. [2021-06-12 20:13:05,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:05,174 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:05,174 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:05,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1473 [2021-06-12 20:13:05,398 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:05,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:05,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1986111548, now seen corresponding path program 137 times [2021-06-12 20:13:05,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:05,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865850966] [2021-06-12 20:13:05,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:05,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:05,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865850966] [2021-06-12 20:13:05,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865850966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:05,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117084524] [2021-06-12 20:13:05,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:05,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:13:05,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:05,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:05,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:05,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117084524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:05,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:05,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:05,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163406402] [2021-06-12 20:13:05,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:05,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:05,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:05,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:05,717 INFO L87 Difference]: Start difference. First operand 338 states and 1008 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:06,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:06,133 INFO L93 Difference]: Finished difference Result 756 states and 2173 transitions. [2021-06-12 20:13:06,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:06,134 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:06,135 INFO L225 Difference]: With dead ends: 756 [2021-06-12 20:13:06,135 INFO L226 Difference]: Without dead ends: 720 [2021-06-12 20:13:06,135 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 365.6ms TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:13:06,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-12 20:13:06,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 332. [2021-06-12 20:13:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.972809667673716) internal successors, (984), 331 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:06,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 984 transitions. [2021-06-12 20:13:06,141 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 984 transitions. Word has length 22 [2021-06-12 20:13:06,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:06,142 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 984 transitions. [2021-06-12 20:13:06,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:06,142 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 984 transitions. [2021-06-12 20:13:06,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:06,142 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:06,142 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:06,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1481,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:06,349 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:06,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:06,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1654265104, now seen corresponding path program 138 times [2021-06-12 20:13:06,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:06,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621075565] [2021-06-12 20:13:06,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:06,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:06,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621075565] [2021-06-12 20:13:06,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621075565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:06,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271674375] [2021-06-12 20:13:06,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:06,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:13:06,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:06,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:06,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:06,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271674375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:06,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:06,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:06,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381651658] [2021-06-12 20:13:06,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:06,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:06,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:06,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:06,717 INFO L87 Difference]: Start difference. First operand 332 states and 984 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:07,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:07,138 INFO L93 Difference]: Finished difference Result 659 states and 1924 transitions. [2021-06-12 20:13:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:07,138 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:07,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:07,139 INFO L225 Difference]: With dead ends: 659 [2021-06-12 20:13:07,139 INFO L226 Difference]: Without dead ends: 659 [2021-06-12 20:13:07,139 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:13:07,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-06-12 20:13:07,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 340. [2021-06-12 20:13:07,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0) internal successors, (1017), 339 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:07,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1017 transitions. [2021-06-12 20:13:07,145 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1017 transitions. Word has length 22 [2021-06-12 20:13:07,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:07,145 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1017 transitions. [2021-06-12 20:13:07,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:07,145 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1017 transitions. [2021-06-12 20:13:07,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:07,145 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:07,145 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:07,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1489 [2021-06-12 20:13:07,360 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:07,361 INFO L82 PathProgramCache]: Analyzing trace with hash -159662140, now seen corresponding path program 139 times [2021-06-12 20:13:07,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:07,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136154837] [2021-06-12 20:13:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:07,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:07,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136154837] [2021-06-12 20:13:07,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136154837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:07,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513313405] [2021-06-12 20:13:07,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:07,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:07,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:07,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513313405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:07,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:07,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:07,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864120798] [2021-06-12 20:13:07,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:07,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:07,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:07,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:07,785 INFO L87 Difference]: Start difference. First operand 340 states and 1017 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:08,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:08,947 INFO L93 Difference]: Finished difference Result 743 states and 2162 transitions. [2021-06-12 20:13:08,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:13:08,948 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:08,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:08,949 INFO L225 Difference]: With dead ends: 743 [2021-06-12 20:13:08,949 INFO L226 Difference]: Without dead ends: 733 [2021-06-12 20:13:08,949 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 925.6ms TimeCoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:13:08,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-06-12 20:13:08,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 337. [2021-06-12 20:13:08,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.9910714285714284) internal successors, (1005), 336 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:08,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1005 transitions. [2021-06-12 20:13:08,955 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1005 transitions. Word has length 22 [2021-06-12 20:13:08,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:08,955 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1005 transitions. [2021-06-12 20:13:08,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:08,955 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1005 transitions. [2021-06-12 20:13:08,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:08,956 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:08,956 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:09,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1501,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:09,169 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:09,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:09,169 INFO L82 PathProgramCache]: Analyzing trace with hash 265285070, now seen corresponding path program 140 times [2021-06-12 20:13:09,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:09,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878824787] [2021-06-12 20:13:09,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:09,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:09,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878824787] [2021-06-12 20:13:09,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878824787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:09,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288015050] [2021-06-12 20:13:09,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:09,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:13:09,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:09,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:09,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:09,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288015050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:09,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:09,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:09,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259427981] [2021-06-12 20:13:09,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:09,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:09,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:09,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:09,721 INFO L87 Difference]: Start difference. First operand 337 states and 1005 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:10,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:10,378 INFO L93 Difference]: Finished difference Result 667 states and 1949 transitions. [2021-06-12 20:13:10,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:13:10,379 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:10,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:10,380 INFO L225 Difference]: With dead ends: 667 [2021-06-12 20:13:10,380 INFO L226 Difference]: Without dead ends: 647 [2021-06-12 20:13:10,380 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 725.0ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:13:10,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-06-12 20:13:10,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 334. [2021-06-12 20:13:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.981981981981982) internal successors, (993), 333 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 993 transitions. [2021-06-12 20:13:10,385 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 993 transitions. Word has length 22 [2021-06-12 20:13:10,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:10,385 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 993 transitions. [2021-06-12 20:13:10,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 993 transitions. [2021-06-12 20:13:10,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:10,386 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:10,386 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:10,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1513 [2021-06-12 20:13:10,610 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:10,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:10,610 INFO L82 PathProgramCache]: Analyzing trace with hash -549395800, now seen corresponding path program 141 times [2021-06-12 20:13:10,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:10,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686571452] [2021-06-12 20:13:10,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:10,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:10,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686571452] [2021-06-12 20:13:10,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686571452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:10,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470473339] [2021-06-12 20:13:10,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:10,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:13:10,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:10,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:10,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:10,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470473339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:10,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:10,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:10,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323421364] [2021-06-12 20:13:10,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:10,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:10,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:10,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:10,990 INFO L87 Difference]: Start difference. First operand 334 states and 993 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:11,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:11,703 INFO L93 Difference]: Finished difference Result 777 states and 2260 transitions. [2021-06-12 20:13:11,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:13:11,703 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:11,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:11,704 INFO L225 Difference]: With dead ends: 777 [2021-06-12 20:13:11,704 INFO L226 Difference]: Without dead ends: 777 [2021-06-12 20:13:11,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 654.3ms TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:13:11,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-06-12 20:13:11,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 344. [2021-06-12 20:13:11,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.0320699708454812) internal successors, (1040), 343 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1040 transitions. [2021-06-12 20:13:11,711 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1040 transitions. Word has length 22 [2021-06-12 20:13:11,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:11,711 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1040 transitions. [2021-06-12 20:13:11,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:11,712 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1040 transitions. [2021-06-12 20:13:11,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:11,712 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:11,712 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:11,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1521 [2021-06-12 20:13:11,935 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:11,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:11,935 INFO L82 PathProgramCache]: Analyzing trace with hash 945207164, now seen corresponding path program 142 times [2021-06-12 20:13:11,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:11,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883527979] [2021-06-12 20:13:11,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:12,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:12,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883527979] [2021-06-12 20:13:12,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883527979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:12,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551800692] [2021-06-12 20:13:12,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:12,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:13:12,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:12,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:12,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:12,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551800692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:12,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:12,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:12,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308952110] [2021-06-12 20:13:12,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:12,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:12,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:12,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:12,521 INFO L87 Difference]: Start difference. First operand 344 states and 1040 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:14,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:14,087 INFO L93 Difference]: Finished difference Result 860 states and 2485 transitions. [2021-06-12 20:13:14,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:13:14,087 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:14,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:14,088 INFO L225 Difference]: With dead ends: 860 [2021-06-12 20:13:14,088 INFO L226 Difference]: Without dead ends: 850 [2021-06-12 20:13:14,089 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1399.4ms TimeCoverageRelationStatistics Valid=355, Invalid=1205, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:13:14,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-06-12 20:13:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 351. [2021-06-12 20:13:14,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 3.0114285714285716) internal successors, (1054), 350 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1054 transitions. [2021-06-12 20:13:14,095 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1054 transitions. Word has length 22 [2021-06-12 20:13:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:14,095 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1054 transitions. [2021-06-12 20:13:14,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1054 transitions. [2021-06-12 20:13:14,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:14,096 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:14,096 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:14,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1535,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:14,321 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:14,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:14,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1899228176, now seen corresponding path program 143 times [2021-06-12 20:13:14,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:14,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115608439] [2021-06-12 20:13:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:14,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:14,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115608439] [2021-06-12 20:13:14,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115608439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:14,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453142677] [2021-06-12 20:13:14,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:14,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:13:14,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:14,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:14,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:14,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453142677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:14,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:14,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:14,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255307983] [2021-06-12 20:13:14,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:14,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:14,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:14,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:14,819 INFO L87 Difference]: Start difference. First operand 351 states and 1054 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:15,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:15,288 INFO L93 Difference]: Finished difference Result 710 states and 2069 transitions. [2021-06-12 20:13:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:15,289 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:15,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:15,292 INFO L225 Difference]: With dead ends: 710 [2021-06-12 20:13:15,292 INFO L226 Difference]: Without dead ends: 710 [2021-06-12 20:13:15,293 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 524.9ms TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:13:15,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-06-12 20:13:15,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 342. [2021-06-12 20:13:15,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 3.0175953079178885) internal successors, (1029), 341 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1029 transitions. [2021-06-12 20:13:15,299 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1029 transitions. Word has length 22 [2021-06-12 20:13:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:15,299 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1029 transitions. [2021-06-12 20:13:15,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:15,300 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1029 transitions. [2021-06-12 20:13:15,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:15,300 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:15,300 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:15,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1546 [2021-06-12 20:13:15,524 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:15,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:15,524 INFO L82 PathProgramCache]: Analyzing trace with hash 883719676, now seen corresponding path program 144 times [2021-06-12 20:13:15,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:15,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858282891] [2021-06-12 20:13:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:15,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:15,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858282891] [2021-06-12 20:13:15,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858282891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:15,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559771900] [2021-06-12 20:13:15,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:15,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:13:15,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:15,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:15,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:15,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559771900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:15,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:15,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:15,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328690276] [2021-06-12 20:13:15,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:15,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:15,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:15,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:15,977 INFO L87 Difference]: Start difference. First operand 342 states and 1029 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:16,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:16,477 INFO L93 Difference]: Finished difference Result 701 states and 2021 transitions. [2021-06-12 20:13:16,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:16,477 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:16,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:16,478 INFO L225 Difference]: With dead ends: 701 [2021-06-12 20:13:16,478 INFO L226 Difference]: Without dead ends: 692 [2021-06-12 20:13:16,478 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 516.8ms TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:13:16,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-06-12 20:13:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 348. [2021-06-12 20:13:16,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 3.0) internal successors, (1041), 347 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1041 transitions. [2021-06-12 20:13:16,483 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1041 transitions. Word has length 22 [2021-06-12 20:13:16,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:16,483 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1041 transitions. [2021-06-12 20:13:16,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:16,484 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1041 transitions. [2021-06-12 20:13:16,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:16,484 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:16,484 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:16,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1557,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:16,685 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:16,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:16,685 INFO L82 PathProgramCache]: Analyzing trace with hash 661159310, now seen corresponding path program 145 times [2021-06-12 20:13:16,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:16,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068657121] [2021-06-12 20:13:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:16,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:16,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068657121] [2021-06-12 20:13:16,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068657121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:16,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363994298] [2021-06-12 20:13:16,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:16,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:16,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:17,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363994298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:17,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:17,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:13:17,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902928187] [2021-06-12 20:13:17,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:13:17,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:17,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:13:17,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:13:17,011 INFO L87 Difference]: Start difference. First operand 348 states and 1041 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:17,174 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-06-12 20:13:18,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:18,259 INFO L93 Difference]: Finished difference Result 796 states and 2271 transitions. [2021-06-12 20:13:18,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:13:18,259 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:18,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:18,260 INFO L225 Difference]: With dead ends: 796 [2021-06-12 20:13:18,260 INFO L226 Difference]: Without dead ends: 786 [2021-06-12 20:13:18,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1111.6ms TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:13:18,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-06-12 20:13:18,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 370. [2021-06-12 20:13:18,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.994579945799458) internal successors, (1105), 369 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:18,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1105 transitions. [2021-06-12 20:13:18,267 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1105 transitions. Word has length 22 [2021-06-12 20:13:18,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:18,267 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1105 transitions. [2021-06-12 20:13:18,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:18,267 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1105 transitions. [2021-06-12 20:13:18,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:18,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:18,268 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:18,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1570,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:18,492 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:18,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:18,492 INFO L82 PathProgramCache]: Analyzing trace with hash 479068998, now seen corresponding path program 146 times [2021-06-12 20:13:18,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:18,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156432477] [2021-06-12 20:13:18,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:18,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:18,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156432477] [2021-06-12 20:13:18,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156432477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:18,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749852448] [2021-06-12 20:13:18,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:18,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:13:18,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:18,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:18,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:18,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749852448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:18,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:18,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:13:18,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229791250] [2021-06-12 20:13:18,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:13:18,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:18,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:13:18,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:13:18,864 INFO L87 Difference]: Start difference. First operand 370 states and 1105 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:19,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:19,882 INFO L93 Difference]: Finished difference Result 786 states and 2232 transitions. [2021-06-12 20:13:19,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:13:19,882 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:19,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:19,883 INFO L225 Difference]: With dead ends: 786 [2021-06-12 20:13:19,883 INFO L226 Difference]: Without dead ends: 774 [2021-06-12 20:13:19,884 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 882.9ms TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:13:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-06-12 20:13:19,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 350. [2021-06-12 20:13:19,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.994269340974212) internal successors, (1045), 349 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1045 transitions. [2021-06-12 20:13:19,899 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1045 transitions. Word has length 22 [2021-06-12 20:13:19,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:19,899 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1045 transitions. [2021-06-12 20:13:19,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:19,899 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1045 transitions. [2021-06-12 20:13:19,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:19,900 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:19,900 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:20,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1584 [2021-06-12 20:13:20,101 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:20,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:20,101 INFO L82 PathProgramCache]: Analyzing trace with hash 49736188, now seen corresponding path program 147 times [2021-06-12 20:13:20,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:20,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636339785] [2021-06-12 20:13:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:20,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:20,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636339785] [2021-06-12 20:13:20,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636339785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:20,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397822218] [2021-06-12 20:13:20,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:20,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:13:20,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:20,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:20,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:20,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397822218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:20,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:20,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:20,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475398919] [2021-06-12 20:13:20,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:20,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:20,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:20,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:20,430 INFO L87 Difference]: Start difference. First operand 350 states and 1045 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:20,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:20,951 INFO L93 Difference]: Finished difference Result 649 states and 1895 transitions. [2021-06-12 20:13:20,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:13:20,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:20,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:20,953 INFO L225 Difference]: With dead ends: 649 [2021-06-12 20:13:20,953 INFO L226 Difference]: Without dead ends: 629 [2021-06-12 20:13:20,953 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 490.2ms TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:13:20,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-12 20:13:20,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 356. [2021-06-12 20:13:20,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.980281690140845) internal successors, (1058), 355 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:20,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1058 transitions. [2021-06-12 20:13:20,959 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1058 transitions. Word has length 22 [2021-06-12 20:13:20,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:20,959 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1058 transitions. [2021-06-12 20:13:20,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:20,959 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1058 transitions. [2021-06-12 20:13:20,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:20,960 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:20,960 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:21,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1598 [2021-06-12 20:13:21,184 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:21,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:21,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1300096188, now seen corresponding path program 148 times [2021-06-12 20:13:21,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:21,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138414598] [2021-06-12 20:13:21,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:21,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:21,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138414598] [2021-06-12 20:13:21,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138414598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:21,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922433092] [2021-06-12 20:13:21,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:21,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:13:21,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:21,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:21,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:21,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922433092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:21,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:21,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:13:21,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113927134] [2021-06-12 20:13:21,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:13:21,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:21,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:13:21,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:13:21,578 INFO L87 Difference]: Start difference. First operand 356 states and 1058 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:22,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:22,382 INFO L93 Difference]: Finished difference Result 727 states and 2073 transitions. [2021-06-12 20:13:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:13:22,382 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:22,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:22,383 INFO L225 Difference]: With dead ends: 727 [2021-06-12 20:13:22,383 INFO L226 Difference]: Without dead ends: 717 [2021-06-12 20:13:22,384 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 709.7ms TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:13:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-12 20:13:22,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 378. [2021-06-12 20:13:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.976127320954907) internal successors, (1122), 377 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:22,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1122 transitions. [2021-06-12 20:13:22,390 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1122 transitions. Word has length 22 [2021-06-12 20:13:22,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:22,390 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 1122 transitions. [2021-06-12 20:13:22,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1122 transitions. [2021-06-12 20:13:22,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:22,390 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:22,390 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:22,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1605 [2021-06-12 20:13:22,605 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:22,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:22,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1482186500, now seen corresponding path program 149 times [2021-06-12 20:13:22,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:22,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668267136] [2021-06-12 20:13:22,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:22,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:22,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668267136] [2021-06-12 20:13:22,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668267136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:22,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991629775] [2021-06-12 20:13:22,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:22,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:13:22,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:22,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:22,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:22,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991629775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:22,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:22,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:13:22,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132243527] [2021-06-12 20:13:22,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:13:22,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:22,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:13:22,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:13:22,997 INFO L87 Difference]: Start difference. First operand 378 states and 1122 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:23,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:23,663 INFO L93 Difference]: Finished difference Result 684 states and 1962 transitions. [2021-06-12 20:13:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:13:23,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:23,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:23,664 INFO L225 Difference]: With dead ends: 684 [2021-06-12 20:13:23,664 INFO L226 Difference]: Without dead ends: 669 [2021-06-12 20:13:23,664 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 611.5ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:13:23,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-06-12 20:13:23,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 352. [2021-06-12 20:13:23,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.988603988603989) internal successors, (1049), 351 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:23,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1049 transitions. [2021-06-12 20:13:23,670 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1049 transitions. Word has length 22 [2021-06-12 20:13:23,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:23,671 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1049 transitions. [2021-06-12 20:13:23,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:23,671 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1049 transitions. [2021-06-12 20:13:23,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:23,671 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:23,671 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:23,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1615,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:23,895 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:23,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:23,896 INFO L82 PathProgramCache]: Analyzing trace with hash -400936498, now seen corresponding path program 150 times [2021-06-12 20:13:23,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:23,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513004031] [2021-06-12 20:13:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:24,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:24,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513004031] [2021-06-12 20:13:24,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513004031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:24,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382721712] [2021-06-12 20:13:24,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:24,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:13:24,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:24,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:24,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:24,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:24,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382721712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:24,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:24,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:24,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450793550] [2021-06-12 20:13:24,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:24,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:24,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:24,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:24,312 INFO L87 Difference]: Start difference. First operand 352 states and 1049 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:24,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:24,740 INFO L93 Difference]: Finished difference Result 665 states and 1917 transitions. [2021-06-12 20:13:24,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:24,740 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:24,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:24,741 INFO L225 Difference]: With dead ends: 665 [2021-06-12 20:13:24,741 INFO L226 Difference]: Without dead ends: 629 [2021-06-12 20:13:24,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 409.9ms TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:13:24,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-12 20:13:24,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 362. [2021-06-12 20:13:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.96398891966759) internal successors, (1070), 361 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1070 transitions. [2021-06-12 20:13:24,746 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1070 transitions. Word has length 22 [2021-06-12 20:13:24,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:24,746 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1070 transitions. [2021-06-12 20:13:24,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:24,746 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1070 transitions. [2021-06-12 20:13:24,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:24,746 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:24,747 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:24,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1627 [2021-06-12 20:13:24,965 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:24,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:24,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1124721900, now seen corresponding path program 151 times [2021-06-12 20:13:24,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:24,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010038676] [2021-06-12 20:13:24,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:25,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:25,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010038676] [2021-06-12 20:13:25,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010038676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:25,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500163869] [2021-06-12 20:13:25,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:25,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:25,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:25,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500163869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:25,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:25,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:25,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766366994] [2021-06-12 20:13:25,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:25,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:25,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:25,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:25,282 INFO L87 Difference]: Start difference. First operand 362 states and 1070 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:25,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:25,733 INFO L93 Difference]: Finished difference Result 609 states and 1767 transitions. [2021-06-12 20:13:25,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:25,734 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:25,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:25,735 INFO L225 Difference]: With dead ends: 609 [2021-06-12 20:13:25,735 INFO L226 Difference]: Without dead ends: 589 [2021-06-12 20:13:25,735 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 407.4ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:13:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-12 20:13:25,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 368. [2021-06-12 20:13:25,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.9509536784741144) internal successors, (1083), 367 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1083 transitions. [2021-06-12 20:13:25,740 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1083 transitions. Word has length 22 [2021-06-12 20:13:25,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:25,741 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1083 transitions. [2021-06-12 20:13:25,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:25,741 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1083 transitions. [2021-06-12 20:13:25,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:25,741 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:25,741 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:25,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1637,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:25,966 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:25,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:25,966 INFO L82 PathProgramCache]: Analyzing trace with hash -225110476, now seen corresponding path program 152 times [2021-06-12 20:13:25,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:25,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50678302] [2021-06-12 20:13:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:26,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:26,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50678302] [2021-06-12 20:13:26,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50678302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:26,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609081615] [2021-06-12 20:13:26,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:26,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:13:26,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:26,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:26,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:26,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609081615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:26,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:26,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:13:26,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091341236] [2021-06-12 20:13:26,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:13:26,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:26,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:13:26,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:13:26,307 INFO L87 Difference]: Start difference. First operand 368 states and 1083 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:26,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:26,817 INFO L93 Difference]: Finished difference Result 687 states and 1945 transitions. [2021-06-12 20:13:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:13:26,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:26,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:26,818 INFO L225 Difference]: With dead ends: 687 [2021-06-12 20:13:26,819 INFO L226 Difference]: Without dead ends: 677 [2021-06-12 20:13:26,819 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 485.0ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:13:26,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-12 20:13:26,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 390. [2021-06-12 20:13:26,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.948586118251928) internal successors, (1147), 389 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:26,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1147 transitions. [2021-06-12 20:13:26,823 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1147 transitions. Word has length 22 [2021-06-12 20:13:26,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:26,824 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1147 transitions. [2021-06-12 20:13:26,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:26,824 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1147 transitions. [2021-06-12 20:13:26,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:26,824 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:26,824 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:27,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1645,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:27,025 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:27,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:27,025 INFO L82 PathProgramCache]: Analyzing trace with hash -407200788, now seen corresponding path program 153 times [2021-06-12 20:13:27,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:27,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451466799] [2021-06-12 20:13:27,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:27,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:27,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451466799] [2021-06-12 20:13:27,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451466799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:27,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69298699] [2021-06-12 20:13:27,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:27,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:13:27,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:27,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:27,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:27,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69298699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:27,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:27,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:13:27,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744812491] [2021-06-12 20:13:27,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:13:27,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:27,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:13:27,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:13:27,525 INFO L87 Difference]: Start difference. First operand 390 states and 1147 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:27,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:27,904 INFO L93 Difference]: Finished difference Result 644 states and 1834 transitions. [2021-06-12 20:13:27,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:27,904 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:27,905 INFO L225 Difference]: With dead ends: 644 [2021-06-12 20:13:27,905 INFO L226 Difference]: Without dead ends: 624 [2021-06-12 20:13:27,905 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 423.0ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:13:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-12 20:13:27,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 355. [2021-06-12 20:13:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.977401129943503) internal successors, (1054), 354 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1054 transitions. [2021-06-12 20:13:27,911 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1054 transitions. Word has length 22 [2021-06-12 20:13:27,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:27,911 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1054 transitions. [2021-06-12 20:13:27,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:27,911 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1054 transitions. [2021-06-12 20:13:27,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:27,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:27,912 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:28,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1655 [2021-06-12 20:13:28,129 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:28,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:28,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1187444538, now seen corresponding path program 154 times [2021-06-12 20:13:28,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:28,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535432524] [2021-06-12 20:13:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:28,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:28,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535432524] [2021-06-12 20:13:28,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535432524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:28,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067736978] [2021-06-12 20:13:28,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:28,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:13:28,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:28,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:28,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:28,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067736978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:28,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:28,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:28,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999033311] [2021-06-12 20:13:28,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:28,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:28,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:28,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:28,478 INFO L87 Difference]: Start difference. First operand 355 states and 1054 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:28,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:28,822 INFO L93 Difference]: Finished difference Result 643 states and 1857 transitions. [2021-06-12 20:13:28,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:28,823 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:28,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:28,824 INFO L225 Difference]: With dead ends: 643 [2021-06-12 20:13:28,824 INFO L226 Difference]: Without dead ends: 643 [2021-06-12 20:13:28,824 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 351.4ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:13:28,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-12 20:13:28,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 364. [2021-06-12 20:13:28,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.9669421487603307) internal successors, (1077), 363 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:28,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1077 transitions. [2021-06-12 20:13:28,830 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1077 transitions. Word has length 22 [2021-06-12 20:13:28,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:28,830 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 1077 transitions. [2021-06-12 20:13:28,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:28,830 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1077 transitions. [2021-06-12 20:13:28,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:28,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:28,845 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:29,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1665,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:29,046 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:29,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:29,046 INFO L82 PathProgramCache]: Analyzing trace with hash 307158426, now seen corresponding path program 155 times [2021-06-12 20:13:29,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:29,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17664131] [2021-06-12 20:13:29,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:29,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:29,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17664131] [2021-06-12 20:13:29,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17664131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:29,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986460269] [2021-06-12 20:13:29,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:29,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:13:29,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:29,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:29,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:29,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986460269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:29,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:29,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:29,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933506471] [2021-06-12 20:13:29,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:29,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:29,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:29,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:29,342 INFO L87 Difference]: Start difference. First operand 364 states and 1077 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:29,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:29,952 INFO L93 Difference]: Finished difference Result 666 states and 1909 transitions. [2021-06-12 20:13:29,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:13:29,953 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:29,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:29,954 INFO L225 Difference]: With dead ends: 666 [2021-06-12 20:13:29,954 INFO L226 Difference]: Without dead ends: 656 [2021-06-12 20:13:29,954 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 477.9ms TimeCoverageRelationStatistics Valid=200, Invalid=670, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:13:29,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-06-12 20:13:29,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 361. [2021-06-12 20:13:29,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.9583333333333335) internal successors, (1065), 360 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:29,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1065 transitions. [2021-06-12 20:13:29,958 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1065 transitions. Word has length 22 [2021-06-12 20:13:29,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:29,959 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 1065 transitions. [2021-06-12 20:13:29,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:29,959 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1065 transitions. [2021-06-12 20:13:29,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:29,959 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:29,959 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:30,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1671 [2021-06-12 20:13:30,160 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:30,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:30,160 INFO L82 PathProgramCache]: Analyzing trace with hash 732105636, now seen corresponding path program 156 times [2021-06-12 20:13:30,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:30,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332532022] [2021-06-12 20:13:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:30,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:30,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332532022] [2021-06-12 20:13:30,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332532022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:30,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673862898] [2021-06-12 20:13:30,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:30,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:13:30,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:30,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:30,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:30,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673862898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:30,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:30,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:30,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767498653] [2021-06-12 20:13:30,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:30,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:30,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:30,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:30,748 INFO L87 Difference]: Start difference. First operand 361 states and 1065 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:31,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:31,192 INFO L93 Difference]: Finished difference Result 652 states and 1887 transitions. [2021-06-12 20:13:31,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:13:31,193 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:31,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:31,194 INFO L225 Difference]: With dead ends: 652 [2021-06-12 20:13:31,194 INFO L226 Difference]: Without dead ends: 632 [2021-06-12 20:13:31,194 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 626.6ms TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:13:31,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-12 20:13:31,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 358. [2021-06-12 20:13:31,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.9495798319327733) internal successors, (1053), 357 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:31,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1053 transitions. [2021-06-12 20:13:31,199 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1053 transitions. Word has length 22 [2021-06-12 20:13:31,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:31,199 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 1053 transitions. [2021-06-12 20:13:31,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:31,200 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1053 transitions. [2021-06-12 20:13:31,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:31,200 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:31,200 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:31,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1676 [2021-06-12 20:13:31,424 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:31,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:31,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1791265100, now seen corresponding path program 157 times [2021-06-12 20:13:31,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:31,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741237364] [2021-06-12 20:13:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:31,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:31,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741237364] [2021-06-12 20:13:31,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741237364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:31,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770238839] [2021-06-12 20:13:31,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:31,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:31,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:31,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:31,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770238839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:31,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:31,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:31,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735854031] [2021-06-12 20:13:31,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:31,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:31,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:31,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:31,719 INFO L87 Difference]: Start difference. First operand 358 states and 1053 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:32,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:32,032 INFO L93 Difference]: Finished difference Result 580 states and 1679 transitions. [2021-06-12 20:13:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:32,033 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:32,034 INFO L225 Difference]: With dead ends: 580 [2021-06-12 20:13:32,034 INFO L226 Difference]: Without dead ends: 544 [2021-06-12 20:13:32,034 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 281.3ms TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:13:32,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-12 20:13:32,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 332. [2021-06-12 20:13:32,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.9486404833836857) internal successors, (976), 331 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 976 transitions. [2021-06-12 20:13:32,054 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 976 transitions. Word has length 22 [2021-06-12 20:13:32,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:32,054 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 976 transitions. [2021-06-12 20:13:32,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:32,054 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 976 transitions. [2021-06-12 20:13:32,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:32,055 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:32,055 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:32,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1680,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:32,277 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:32,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:32,278 INFO L82 PathProgramCache]: Analyzing trace with hash 833708592, now seen corresponding path program 158 times [2021-06-12 20:13:32,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:32,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31032938] [2021-06-12 20:13:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:32,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:32,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31032938] [2021-06-12 20:13:32,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31032938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:32,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695955823] [2021-06-12 20:13:32,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:32,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:13:32,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:32,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:32,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:32,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695955823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:32,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:32,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:32,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879034109] [2021-06-12 20:13:32,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:32,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:32,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:32,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:32,581 INFO L87 Difference]: Start difference. First operand 332 states and 976 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:32,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:32,829 INFO L93 Difference]: Finished difference Result 529 states and 1547 transitions. [2021-06-12 20:13:32,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:13:32,830 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:32,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:32,830 INFO L225 Difference]: With dead ends: 529 [2021-06-12 20:13:32,830 INFO L226 Difference]: Without dead ends: 529 [2021-06-12 20:13:32,831 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 203.5ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:13:32,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-12 20:13:32,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 341. [2021-06-12 20:13:32,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9676470588235295) internal successors, (1009), 340 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:32,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1009 transitions. [2021-06-12 20:13:32,835 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1009 transitions. Word has length 22 [2021-06-12 20:13:32,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:32,835 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1009 transitions. [2021-06-12 20:13:32,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:32,835 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1009 transitions. [2021-06-12 20:13:32,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:32,835 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:32,835 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:33,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1684 [2021-06-12 20:13:33,036 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:33,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:33,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1966655740, now seen corresponding path program 159 times [2021-06-12 20:13:33,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:33,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150291430] [2021-06-12 20:13:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:33,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:33,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150291430] [2021-06-12 20:13:33,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150291430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:33,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116258263] [2021-06-12 20:13:33,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:33,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:13:33,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:33,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:33,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:33,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116258263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:33,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:33,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:33,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842029470] [2021-06-12 20:13:33,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:33,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:33,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:33,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:33,374 INFO L87 Difference]: Start difference. First operand 341 states and 1009 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:33,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:33,644 INFO L93 Difference]: Finished difference Result 560 states and 1626 transitions. [2021-06-12 20:13:33,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:33,644 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:33,645 INFO L225 Difference]: With dead ends: 560 [2021-06-12 20:13:33,645 INFO L226 Difference]: Without dead ends: 550 [2021-06-12 20:13:33,645 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:13:33,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-12 20:13:33,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 338. [2021-06-12 20:13:33,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9584569732937687) internal successors, (997), 337 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:33,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 997 transitions. [2021-06-12 20:13:33,649 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 997 transitions. Word has length 22 [2021-06-12 20:13:33,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:33,649 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 997 transitions. [2021-06-12 20:13:33,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:33,649 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 997 transitions. [2021-06-12 20:13:33,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:33,650 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:33,650 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:33,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1689 [2021-06-12 20:13:33,850 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:33,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:33,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1541708530, now seen corresponding path program 160 times [2021-06-12 20:13:33,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:33,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15982390] [2021-06-12 20:13:33,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:33,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:33,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15982390] [2021-06-12 20:13:33,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15982390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:33,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737459687] [2021-06-12 20:13:33,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:33,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:13:33,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:33,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:33,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:34,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737459687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:34,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:34,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:34,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011129889] [2021-06-12 20:13:34,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:34,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:34,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:34,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:34,104 INFO L87 Difference]: Start difference. First operand 338 states and 997 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:34,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:34,361 INFO L93 Difference]: Finished difference Result 511 states and 1498 transitions. [2021-06-12 20:13:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:34,361 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:34,362 INFO L225 Difference]: With dead ends: 511 [2021-06-12 20:13:34,362 INFO L226 Difference]: Without dead ends: 491 [2021-06-12 20:13:34,362 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:13:34,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-12 20:13:34,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 335. [2021-06-12 20:13:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.9491017964071857) internal successors, (985), 334 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:34,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 985 transitions. [2021-06-12 20:13:34,366 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 985 transitions. Word has length 22 [2021-06-12 20:13:34,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:34,366 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 985 transitions. [2021-06-12 20:13:34,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:34,366 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 985 transitions. [2021-06-12 20:13:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:34,366 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:34,366 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:34,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1695,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:34,581 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:34,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:34,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1380787108, now seen corresponding path program 161 times [2021-06-12 20:13:34,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:34,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903660439] [2021-06-12 20:13:34,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:34,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:34,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:34,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903660439] [2021-06-12 20:13:34,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903660439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:34,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185247873] [2021-06-12 20:13:34,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:34,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:13:34,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:34,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:34,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:34,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185247873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:34,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:34,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:34,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854103340] [2021-06-12 20:13:34,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:34,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:34,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:34,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:34,841 INFO L87 Difference]: Start difference. First operand 335 states and 985 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:35,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:35,128 INFO L93 Difference]: Finished difference Result 621 states and 1797 transitions. [2021-06-12 20:13:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:13:35,129 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:35,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:35,129 INFO L225 Difference]: With dead ends: 621 [2021-06-12 20:13:35,129 INFO L226 Difference]: Without dead ends: 621 [2021-06-12 20:13:35,129 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:13:35,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-12 20:13:35,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 347. [2021-06-12 20:13:35,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.985549132947977) internal successors, (1033), 346 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:35,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1033 transitions. [2021-06-12 20:13:35,134 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1033 transitions. Word has length 22 [2021-06-12 20:13:35,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:35,134 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1033 transitions. [2021-06-12 20:13:35,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:35,134 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1033 transitions. [2021-06-12 20:13:35,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:35,134 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:35,134 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:35,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1698 [2021-06-12 20:13:35,335 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:35,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:35,335 INFO L82 PathProgramCache]: Analyzing trace with hash 113815856, now seen corresponding path program 162 times [2021-06-12 20:13:35,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:35,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279595838] [2021-06-12 20:13:35,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:35,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:35,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279595838] [2021-06-12 20:13:35,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279595838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:35,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155585873] [2021-06-12 20:13:35,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:35,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:13:35,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:35,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:35,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:35,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155585873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:35,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:35,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:35,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651285976] [2021-06-12 20:13:35,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:35,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:35,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:35,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:35,591 INFO L87 Difference]: Start difference. First operand 347 states and 1033 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:35,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:35,927 INFO L93 Difference]: Finished difference Result 584 states and 1702 transitions. [2021-06-12 20:13:35,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:35,927 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:35,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:35,928 INFO L225 Difference]: With dead ends: 584 [2021-06-12 20:13:35,928 INFO L226 Difference]: Without dead ends: 574 [2021-06-12 20:13:35,928 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 270.3ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:13:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-12 20:13:35,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 354. [2021-06-12 20:13:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.9660056657223794) internal successors, (1047), 353 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:35,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1047 transitions. [2021-06-12 20:13:35,935 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1047 transitions. Word has length 22 [2021-06-12 20:13:35,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:35,935 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1047 transitions. [2021-06-12 20:13:35,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:35,935 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1047 transitions. [2021-06-12 20:13:35,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:35,935 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:35,936 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:36,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1704 [2021-06-12 20:13:36,136 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:36,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:36,136 INFO L82 PathProgramCache]: Analyzing trace with hash -205296464, now seen corresponding path program 163 times [2021-06-12 20:13:36,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:36,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395460016] [2021-06-12 20:13:36,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:36,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:36,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395460016] [2021-06-12 20:13:36,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395460016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:36,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29230067] [2021-06-12 20:13:36,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:36,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:36,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:36,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:36,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29230067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:36,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:36,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:13:36,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109540966] [2021-06-12 20:13:36,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:13:36,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:36,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:13:36,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:13:36,395 INFO L87 Difference]: Start difference. First operand 354 states and 1047 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:36,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:36,557 INFO L93 Difference]: Finished difference Result 488 states and 1444 transitions. [2021-06-12 20:13:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:13:36,557 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:36,558 INFO L225 Difference]: With dead ends: 488 [2021-06-12 20:13:36,558 INFO L226 Difference]: Without dead ends: 488 [2021-06-12 20:13:36,558 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:13:36,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-12 20:13:36,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 326. [2021-06-12 20:13:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9476923076923076) internal successors, (958), 325 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 958 transitions. [2021-06-12 20:13:36,561 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 958 transitions. Word has length 22 [2021-06-12 20:13:36,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:36,562 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 958 transitions. [2021-06-12 20:13:36,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 958 transitions. [2021-06-12 20:13:36,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:36,562 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:36,562 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:36,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-06-12 20:13:36,763 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:36,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:36,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1399002178, now seen corresponding path program 164 times [2021-06-12 20:13:36,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:36,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625629656] [2021-06-12 20:13:36,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:36,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:36,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625629656] [2021-06-12 20:13:36,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625629656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:36,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402371000] [2021-06-12 20:13:36,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:36,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:13:36,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:36,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:36,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:37,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402371000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:37,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:37,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:37,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416047835] [2021-06-12 20:13:37,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:37,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:37,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:37,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:37,057 INFO L87 Difference]: Start difference. First operand 326 states and 958 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:37,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:37,313 INFO L93 Difference]: Finished difference Result 508 states and 1483 transitions. [2021-06-12 20:13:37,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:13:37,313 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:37,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:37,314 INFO L225 Difference]: With dead ends: 508 [2021-06-12 20:13:37,314 INFO L226 Difference]: Without dead ends: 508 [2021-06-12 20:13:37,314 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:13:37,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-12 20:13:37,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 336. [2021-06-12 20:13:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.97910447761194) internal successors, (998), 335 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 998 transitions. [2021-06-12 20:13:37,318 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 998 transitions. Word has length 22 [2021-06-12 20:13:37,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:37,318 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 998 transitions. [2021-06-12 20:13:37,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:37,318 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 998 transitions. [2021-06-12 20:13:37,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:37,319 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:37,319 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:37,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1712,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:37,519 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:37,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:37,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1401362154, now seen corresponding path program 165 times [2021-06-12 20:13:37,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:37,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563002069] [2021-06-12 20:13:37,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:37,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:37,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563002069] [2021-06-12 20:13:37,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563002069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:37,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570138560] [2021-06-12 20:13:37,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:37,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:13:37,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:37,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:37,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:37,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570138560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:37,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:37,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:37,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945911017] [2021-06-12 20:13:37,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:37,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:37,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:37,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:37,848 INFO L87 Difference]: Start difference. First operand 336 states and 998 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:38,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:38,178 INFO L93 Difference]: Finished difference Result 539 states and 1562 transitions. [2021-06-12 20:13:38,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:38,179 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:38,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:38,179 INFO L225 Difference]: With dead ends: 539 [2021-06-12 20:13:38,179 INFO L226 Difference]: Without dead ends: 529 [2021-06-12 20:13:38,180 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 326.6ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:13:38,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-12 20:13:38,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 333. [2021-06-12 20:13:38,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.9698795180722892) internal successors, (986), 332 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:38,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 986 transitions. [2021-06-12 20:13:38,183 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 986 transitions. Word has length 22 [2021-06-12 20:13:38,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:38,184 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 986 transitions. [2021-06-12 20:13:38,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:38,184 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 986 transitions. [2021-06-12 20:13:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:38,184 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:38,184 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:38,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1721 [2021-06-12 20:13:38,385 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:38,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:38,385 INFO L82 PathProgramCache]: Analyzing trace with hash -976414944, now seen corresponding path program 166 times [2021-06-12 20:13:38,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:38,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744247747] [2021-06-12 20:13:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:38,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:38,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744247747] [2021-06-12 20:13:38,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744247747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:38,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889347659] [2021-06-12 20:13:38,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:38,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:13:38,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:38,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:38,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:38,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889347659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:38,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:38,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:38,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808888576] [2021-06-12 20:13:38,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:38,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:38,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:38,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:38,690 INFO L87 Difference]: Start difference. First operand 333 states and 986 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:38,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:38,970 INFO L93 Difference]: Finished difference Result 500 states and 1460 transitions. [2021-06-12 20:13:38,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:38,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:38,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:38,971 INFO L225 Difference]: With dead ends: 500 [2021-06-12 20:13:38,971 INFO L226 Difference]: Without dead ends: 480 [2021-06-12 20:13:38,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 303.5ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:13:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-12 20:13:38,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 330. [2021-06-12 20:13:38,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9604863221884496) internal successors, (974), 329 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 974 transitions. [2021-06-12 20:13:38,975 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 974 transitions. Word has length 22 [2021-06-12 20:13:38,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:38,975 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 974 transitions. [2021-06-12 20:13:38,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:38,975 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 974 transitions. [2021-06-12 20:13:38,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:38,976 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:38,976 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:39,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1730,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:39,176 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:39,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:39,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1791095814, now seen corresponding path program 167 times [2021-06-12 20:13:39,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:39,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400412419] [2021-06-12 20:13:39,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:39,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:39,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400412419] [2021-06-12 20:13:39,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400412419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:39,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50113309] [2021-06-12 20:13:39,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:39,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:13:39,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:39,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:39,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:39,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50113309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:39,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:39,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:39,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868468615] [2021-06-12 20:13:39,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:39,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:39,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:39,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:39,532 INFO L87 Difference]: Start difference. First operand 330 states and 974 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:39,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:39,859 INFO L93 Difference]: Finished difference Result 626 states and 1819 transitions. [2021-06-12 20:13:39,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:13:39,860 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:39,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:39,860 INFO L225 Difference]: With dead ends: 626 [2021-06-12 20:13:39,860 INFO L226 Difference]: Without dead ends: 626 [2021-06-12 20:13:39,861 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 361.5ms TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:13:39,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-06-12 20:13:39,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 340. [2021-06-12 20:13:39,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 3.0117994100294987) internal successors, (1021), 339 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:39,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1021 transitions. [2021-06-12 20:13:39,865 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1021 transitions. Word has length 22 [2021-06-12 20:13:39,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:39,865 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1021 transitions. [2021-06-12 20:13:39,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:39,865 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1021 transitions. [2021-06-12 20:13:39,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:39,865 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:39,865 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:40,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1739,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:40,066 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:40,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:40,066 INFO L82 PathProgramCache]: Analyzing trace with hash -296492850, now seen corresponding path program 168 times [2021-06-12 20:13:40,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:40,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602925022] [2021-06-12 20:13:40,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:40,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:40,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602925022] [2021-06-12 20:13:40,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602925022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:40,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946024086] [2021-06-12 20:13:40,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:40,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:13:40,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:40,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:40,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:40,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946024086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:40,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:40,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:40,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135847681] [2021-06-12 20:13:40,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:40,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:40,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:40,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:40,393 INFO L87 Difference]: Start difference. First operand 340 states and 1021 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:40,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:40,830 INFO L93 Difference]: Finished difference Result 668 states and 1921 transitions. [2021-06-12 20:13:40,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:13:40,830 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:40,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:40,831 INFO L225 Difference]: With dead ends: 668 [2021-06-12 20:13:40,831 INFO L226 Difference]: Without dead ends: 658 [2021-06-12 20:13:40,831 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 416.1ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:13:40,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-06-12 20:13:40,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 347. [2021-06-12 20:13:40,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.991329479768786) internal successors, (1035), 346 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1035 transitions. [2021-06-12 20:13:40,835 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1035 transitions. Word has length 22 [2021-06-12 20:13:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:40,836 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1035 transitions. [2021-06-12 20:13:40,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1035 transitions. [2021-06-12 20:13:40,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:40,836 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:40,836 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:41,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1750 [2021-06-12 20:13:41,037 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:41,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:41,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1154039106, now seen corresponding path program 169 times [2021-06-12 20:13:41,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:41,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897245479] [2021-06-12 20:13:41,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:41,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:41,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:41,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897245479] [2021-06-12 20:13:41,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897245479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:41,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971047561] [2021-06-12 20:13:41,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:41,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:41,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:41,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971047561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:41,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:41,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:41,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058223975] [2021-06-12 20:13:41,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:41,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:41,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:41,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:41,389 INFO L87 Difference]: Start difference. First operand 347 states and 1035 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:41,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:41,667 INFO L93 Difference]: Finished difference Result 559 states and 1628 transitions. [2021-06-12 20:13:41,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:13:41,667 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:41,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:41,668 INFO L225 Difference]: With dead ends: 559 [2021-06-12 20:13:41,668 INFO L226 Difference]: Without dead ends: 559 [2021-06-12 20:13:41,668 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 302.8ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:13:41,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-12 20:13:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 338. [2021-06-12 20:13:41,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.9970326409495547) internal successors, (1010), 337 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1010 transitions. [2021-06-12 20:13:41,675 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1010 transitions. Word has length 22 [2021-06-12 20:13:41,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:41,675 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1010 transitions. [2021-06-12 20:13:41,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1010 transitions. [2021-06-12 20:13:41,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:41,676 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:41,676 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:41,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-06-12 20:13:41,876 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:41,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:41,877 INFO L82 PathProgramCache]: Analyzing trace with hash -357980338, now seen corresponding path program 170 times [2021-06-12 20:13:41,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:41,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892690166] [2021-06-12 20:13:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:41,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:41,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892690166] [2021-06-12 20:13:41,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892690166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:41,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283496264] [2021-06-12 20:13:41,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:42,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:13:42,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:42,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:42,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:42,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283496264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:42,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:42,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:42,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129627285] [2021-06-12 20:13:42,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:42,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:42,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:42,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:42,154 INFO L87 Difference]: Start difference. First operand 338 states and 1010 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:42,427 INFO L93 Difference]: Finished difference Result 550 states and 1580 transitions. [2021-06-12 20:13:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:13:42,427 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:42,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:42,428 INFO L225 Difference]: With dead ends: 550 [2021-06-12 20:13:42,428 INFO L226 Difference]: Without dead ends: 541 [2021-06-12 20:13:42,428 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:13:42,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-06-12 20:13:42,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 344. [2021-06-12 20:13:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.979591836734694) internal successors, (1022), 343 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:42,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1022 transitions. [2021-06-12 20:13:42,437 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1022 transitions. Word has length 22 [2021-06-12 20:13:42,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:42,437 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1022 transitions. [2021-06-12 20:13:42,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:42,438 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1022 transitions. [2021-06-12 20:13:42,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:42,438 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:42,438 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:42,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1773,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:42,639 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:42,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:42,639 INFO L82 PathProgramCache]: Analyzing trace with hash -580540704, now seen corresponding path program 171 times [2021-06-12 20:13:42,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:42,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267722994] [2021-06-12 20:13:42,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:42,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:42,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267722994] [2021-06-12 20:13:42,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267722994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:42,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603436565] [2021-06-12 20:13:42,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:42,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:13:42,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:42,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:42,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:42,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603436565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:42,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:42,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:13:42,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921562] [2021-06-12 20:13:42,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:13:42,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:42,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:13:42,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:13:42,975 INFO L87 Difference]: Start difference. First operand 344 states and 1022 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:43,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:43,464 INFO L93 Difference]: Finished difference Result 617 states and 1746 transitions. [2021-06-12 20:13:43,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:13:43,464 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:43,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:43,465 INFO L225 Difference]: With dead ends: 617 [2021-06-12 20:13:43,465 INFO L226 Difference]: Without dead ends: 607 [2021-06-12 20:13:43,466 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 433.4ms TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:13:43,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-12 20:13:43,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 366. [2021-06-12 20:13:43,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9753424657534246) internal successors, (1086), 365 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1086 transitions. [2021-06-12 20:13:43,471 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1086 transitions. Word has length 22 [2021-06-12 20:13:43,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:43,471 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1086 transitions. [2021-06-12 20:13:43,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1086 transitions. [2021-06-12 20:13:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:43,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:43,472 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:43,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1783 [2021-06-12 20:13:43,694 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:43,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:43,695 INFO L82 PathProgramCache]: Analyzing trace with hash -762631016, now seen corresponding path program 172 times [2021-06-12 20:13:43,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:43,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742749386] [2021-06-12 20:13:43,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:43,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:43,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742749386] [2021-06-12 20:13:43,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742749386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:43,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114689830] [2021-06-12 20:13:43,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:43,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:13:43,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:43,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:43,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:44,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114689830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:44,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:44,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:13:44,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960683612] [2021-06-12 20:13:44,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:13:44,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:44,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:13:44,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:13:44,038 INFO L87 Difference]: Start difference. First operand 366 states and 1086 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:44,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:44,451 INFO L93 Difference]: Finished difference Result 607 states and 1707 transitions. [2021-06-12 20:13:44,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:13:44,451 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:44,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:44,452 INFO L225 Difference]: With dead ends: 607 [2021-06-12 20:13:44,452 INFO L226 Difference]: Without dead ends: 595 [2021-06-12 20:13:44,452 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 380.6ms TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:13:44,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-12 20:13:44,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 346. [2021-06-12 20:13:44,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.973913043478261) internal successors, (1026), 345 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:44,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1026 transitions. [2021-06-12 20:13:44,458 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1026 transitions. Word has length 22 [2021-06-12 20:13:44,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:44,458 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1026 transitions. [2021-06-12 20:13:44,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:44,458 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1026 transitions. [2021-06-12 20:13:44,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:44,458 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:44,460 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:44,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1795 [2021-06-12 20:13:44,677 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:44,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:44,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1191963826, now seen corresponding path program 173 times [2021-06-12 20:13:44,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:44,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460957553] [2021-06-12 20:13:44,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:44,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:44,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460957553] [2021-06-12 20:13:44,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460957553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:44,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353597373] [2021-06-12 20:13:44,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:44,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:13:44,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:44,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:44,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:45,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353597373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:45,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:45,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:45,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835537447] [2021-06-12 20:13:45,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:45,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:45,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:45,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:45,031 INFO L87 Difference]: Start difference. First operand 346 states and 1026 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:45,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:45,468 INFO L93 Difference]: Finished difference Result 475 states and 1390 transitions. [2021-06-12 20:13:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:45,469 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:45,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:45,469 INFO L225 Difference]: With dead ends: 475 [2021-06-12 20:13:45,469 INFO L226 Difference]: Without dead ends: 455 [2021-06-12 20:13:45,470 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 393.9ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:13:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-12 20:13:45,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 352. [2021-06-12 20:13:45,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.96011396011396) internal successors, (1039), 351 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:45,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1039 transitions. [2021-06-12 20:13:45,474 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1039 transitions. Word has length 22 [2021-06-12 20:13:45,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:45,474 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1039 transitions. [2021-06-12 20:13:45,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:45,474 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1039 transitions. [2021-06-12 20:13:45,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:45,475 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:45,475 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:45,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-06-12 20:13:45,693 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:45,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:45,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1753171094, now seen corresponding path program 174 times [2021-06-12 20:13:45,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:45,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608196880] [2021-06-12 20:13:45,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:45,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:45,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608196880] [2021-06-12 20:13:45,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608196880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:45,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726949413] [2021-06-12 20:13:45,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:45,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:13:45,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:45,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:45,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:46,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726949413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:46,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:46,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:13:46,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43906959] [2021-06-12 20:13:46,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:13:46,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:46,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:13:46,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:13:46,107 INFO L87 Difference]: Start difference. First operand 352 states and 1039 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:46,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:46,587 INFO L93 Difference]: Finished difference Result 553 states and 1568 transitions. [2021-06-12 20:13:46,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:13:46,587 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:46,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:46,588 INFO L225 Difference]: With dead ends: 553 [2021-06-12 20:13:46,588 INFO L226 Difference]: Without dead ends: 543 [2021-06-12 20:13:46,588 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 455.9ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:13:46,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-12 20:13:46,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 374. [2021-06-12 20:13:46,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.9571045576407506) internal successors, (1103), 373 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:46,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1103 transitions. [2021-06-12 20:13:46,594 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1103 transitions. Word has length 22 [2021-06-12 20:13:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:46,594 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1103 transitions. [2021-06-12 20:13:46,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:46,594 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1103 transitions. [2021-06-12 20:13:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:46,595 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:46,595 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:46,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1816,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:46,819 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:46,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:46,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1571080782, now seen corresponding path program 175 times [2021-06-12 20:13:46,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:46,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840149272] [2021-06-12 20:13:46,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:46,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:46,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840149272] [2021-06-12 20:13:46,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840149272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:46,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243270831] [2021-06-12 20:13:46,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:46,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:46,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:47,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243270831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:47,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:47,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:13:47,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007785196] [2021-06-12 20:13:47,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:13:47,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:47,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:13:47,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:13:47,211 INFO L87 Difference]: Start difference. First operand 374 states and 1103 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:47,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:47,527 INFO L93 Difference]: Finished difference Result 510 states and 1457 transitions. [2021-06-12 20:13:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:47,528 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:47,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:47,530 INFO L225 Difference]: With dead ends: 510 [2021-06-12 20:13:47,530 INFO L226 Difference]: Without dead ends: 495 [2021-06-12 20:13:47,531 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 347.9ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:13:47,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-12 20:13:47,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 348. [2021-06-12 20:13:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.968299711815562) internal successors, (1030), 347 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:47,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1030 transitions. [2021-06-12 20:13:47,538 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1030 transitions. Word has length 22 [2021-06-12 20:13:47,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:47,538 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1030 transitions. [2021-06-12 20:13:47,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:47,539 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1030 transitions. [2021-06-12 20:13:47,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:47,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:47,539 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:47,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1827,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:47,752 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:47,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:47,753 INFO L82 PathProgramCache]: Analyzing trace with hash 861509322, now seen corresponding path program 176 times [2021-06-12 20:13:47,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:47,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790654485] [2021-06-12 20:13:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:47,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:47,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790654485] [2021-06-12 20:13:47,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790654485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:47,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988214329] [2021-06-12 20:13:47,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:48,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:13:48,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:48,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:48,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:48,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988214329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:48,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:48,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:48,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828946561] [2021-06-12 20:13:48,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:48,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:48,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:48,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:48,363 INFO L87 Difference]: Start difference. First operand 348 states and 1030 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:48,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:48,604 INFO L93 Difference]: Finished difference Result 491 states and 1418 transitions. [2021-06-12 20:13:48,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:13:48,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:48,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:48,605 INFO L225 Difference]: With dead ends: 491 [2021-06-12 20:13:48,605 INFO L226 Difference]: Without dead ends: 491 [2021-06-12 20:13:48,605 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:13:48,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-12 20:13:48,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 351. [2021-06-12 20:13:48,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.954285714285714) internal successors, (1034), 350 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:48,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1034 transitions. [2021-06-12 20:13:48,610 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1034 transitions. Word has length 22 [2021-06-12 20:13:48,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:48,610 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1034 transitions. [2021-06-12 20:13:48,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:48,611 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1034 transitions. [2021-06-12 20:13:48,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:48,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:48,611 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:48,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1838,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:48,833 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:48,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:48,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1938855010, now seen corresponding path program 177 times [2021-06-12 20:13:48,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:48,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876267101] [2021-06-12 20:13:48,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:48,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:48,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876267101] [2021-06-12 20:13:48,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876267101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:48,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709333351] [2021-06-12 20:13:48,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:49,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:13:49,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:49,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:49,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:49,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709333351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:49,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:49,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:49,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570386206] [2021-06-12 20:13:49,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:49,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:49,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:49,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:49,168 INFO L87 Difference]: Start difference. First operand 351 states and 1034 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:49,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:49,507 INFO L93 Difference]: Finished difference Result 522 states and 1494 transitions. [2021-06-12 20:13:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:49,507 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:49,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:49,508 INFO L225 Difference]: With dead ends: 522 [2021-06-12 20:13:49,508 INFO L226 Difference]: Without dead ends: 512 [2021-06-12 20:13:49,508 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 310.6ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:13:49,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-12 20:13:49,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 348. [2021-06-12 20:13:49,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.9452449567723344) internal successors, (1022), 347 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:49,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1022 transitions. [2021-06-12 20:13:49,512 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1022 transitions. Word has length 22 [2021-06-12 20:13:49,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:49,512 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1022 transitions. [2021-06-12 20:13:49,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:49,512 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1022 transitions. [2021-06-12 20:13:49,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:49,513 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:49,513 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:49,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1843,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:49,713 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:49,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:49,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1513907800, now seen corresponding path program 178 times [2021-06-12 20:13:49,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:49,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952170408] [2021-06-12 20:13:49,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:49,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:49,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952170408] [2021-06-12 20:13:49,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952170408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:49,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103862958] [2021-06-12 20:13:49,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:49,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:13:49,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:49,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:49,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:50,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103862958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:50,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:50,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:50,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445100092] [2021-06-12 20:13:50,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:50,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:50,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:50,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:50,101 INFO L87 Difference]: Start difference. First operand 348 states and 1022 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:50,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:50,409 INFO L93 Difference]: Finished difference Result 473 states and 1378 transitions. [2021-06-12 20:13:50,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:50,409 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:50,410 INFO L225 Difference]: With dead ends: 473 [2021-06-12 20:13:50,410 INFO L226 Difference]: Without dead ends: 453 [2021-06-12 20:13:50,410 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 264.8ms TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:13:50,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-12 20:13:50,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 330. [2021-06-12 20:13:50,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.9483282674772036) internal successors, (970), 329 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:50,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 970 transitions. [2021-06-12 20:13:50,415 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 970 transitions. Word has length 22 [2021-06-12 20:13:50,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:50,415 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 970 transitions. [2021-06-12 20:13:50,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:50,415 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 970 transitions. [2021-06-12 20:13:50,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:50,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:50,416 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:50,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1848,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:50,630 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:50,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:50,631 INFO L82 PathProgramCache]: Analyzing trace with hash 193085434, now seen corresponding path program 179 times [2021-06-12 20:13:50,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:50,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346397472] [2021-06-12 20:13:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:50,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:50,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346397472] [2021-06-12 20:13:50,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346397472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:50,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057595491] [2021-06-12 20:13:50,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:50,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:13:50,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:50,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:50,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:50,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057595491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:50,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:50,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:50,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974313988] [2021-06-12 20:13:50,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:50,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:50,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:50,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:50,963 INFO L87 Difference]: Start difference. First operand 330 states and 970 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:51,209 INFO L93 Difference]: Finished difference Result 550 states and 1602 transitions. [2021-06-12 20:13:51,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:51,209 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:51,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:51,210 INFO L225 Difference]: With dead ends: 550 [2021-06-12 20:13:51,210 INFO L226 Difference]: Without dead ends: 550 [2021-06-12 20:13:51,210 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:13:51,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-12 20:13:51,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 342. [2021-06-12 20:13:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9853372434017595) internal successors, (1018), 341 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:51,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1018 transitions. [2021-06-12 20:13:51,216 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1018 transitions. Word has length 22 [2021-06-12 20:13:51,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:51,216 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1018 transitions. [2021-06-12 20:13:51,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:51,216 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1018 transitions. [2021-06-12 20:13:51,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:51,217 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:51,217 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:51,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1852 [2021-06-12 20:13:51,437 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:51,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:51,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1687688398, now seen corresponding path program 180 times [2021-06-12 20:13:51,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:51,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233873428] [2021-06-12 20:13:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:51,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:51,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233873428] [2021-06-12 20:13:51,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233873428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:51,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689241597] [2021-06-12 20:13:51,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:51,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:13:51,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:51,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:51,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:51,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689241597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:51,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:51,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:51,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395575758] [2021-06-12 20:13:51,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:51,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:51,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:51,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:51,794 INFO L87 Difference]: Start difference. First operand 342 states and 1018 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:52,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:52,157 INFO L93 Difference]: Finished difference Result 542 states and 1576 transitions. [2021-06-12 20:13:52,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:52,157 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:52,158 INFO L225 Difference]: With dead ends: 542 [2021-06-12 20:13:52,158 INFO L226 Difference]: Without dead ends: 532 [2021-06-12 20:13:52,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 362.5ms TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:13:52,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-12 20:13:52,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 349. [2021-06-12 20:13:52,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.9655172413793105) internal successors, (1032), 348 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:52,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1032 transitions. [2021-06-12 20:13:52,162 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1032 transitions. Word has length 22 [2021-06-12 20:13:52,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:52,162 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1032 transitions. [2021-06-12 20:13:52,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:52,162 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1032 transitions. [2021-06-12 20:13:52,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:52,163 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:52,163 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:52,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1857,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:52,363 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:52,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:52,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1368576078, now seen corresponding path program 181 times [2021-06-12 20:13:52,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:52,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110437524] [2021-06-12 20:13:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:52,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:52,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110437524] [2021-06-12 20:13:52,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110437524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:52,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183573312] [2021-06-12 20:13:52,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:52,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:52,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:52,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183573312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:52,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:52,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:13:52,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50945603] [2021-06-12 20:13:52,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:13:52,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:52,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:13:52,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:13:52,830 INFO L87 Difference]: Start difference. First operand 349 states and 1032 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:53,043 INFO L93 Difference]: Finished difference Result 450 states and 1330 transitions. [2021-06-12 20:13:53,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:13:53,043 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:53,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:53,044 INFO L225 Difference]: With dead ends: 450 [2021-06-12 20:13:53,044 INFO L226 Difference]: Without dead ends: 450 [2021-06-12 20:13:53,044 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 280.0ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:13:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-12 20:13:53,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 327. [2021-06-12 20:13:53,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.9478527607361964) internal successors, (961), 326 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 961 transitions. [2021-06-12 20:13:53,049 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 961 transitions. Word has length 22 [2021-06-12 20:13:53,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:53,049 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 961 transitions. [2021-06-12 20:13:53,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:53,049 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 961 transitions. [2021-06-12 20:13:53,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:53,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:53,049 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:53,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1863 [2021-06-12 20:13:53,269 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:53,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:53,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1160139342, now seen corresponding path program 182 times [2021-06-12 20:13:53,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:53,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089967809] [2021-06-12 20:13:53,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:53,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:53,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089967809] [2021-06-12 20:13:53,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089967809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:53,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120381461] [2021-06-12 20:13:53,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:53,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:13:53,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:53,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:53,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:53,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120381461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:53,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:53,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:53,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005746890] [2021-06-12 20:13:53,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:53,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:53,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:53,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:53,653 INFO L87 Difference]: Start difference. First operand 327 states and 961 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:54,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:54,009 INFO L93 Difference]: Finished difference Result 707 states and 2023 transitions. [2021-06-12 20:13:54,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:13:54,010 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:54,011 INFO L225 Difference]: With dead ends: 707 [2021-06-12 20:13:54,011 INFO L226 Difference]: Without dead ends: 707 [2021-06-12 20:13:54,011 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 360.0ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:13:54,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-06-12 20:13:54,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 341. [2021-06-12 20:13:54,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 3.011764705882353) internal successors, (1024), 340 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1024 transitions. [2021-06-12 20:13:54,016 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1024 transitions. Word has length 22 [2021-06-12 20:13:54,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:54,016 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1024 transitions. [2021-06-12 20:13:54,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:54,017 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1024 transitions. [2021-06-12 20:13:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:54,017 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:54,017 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:54,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1866,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:54,241 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:54,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:54,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1640224990, now seen corresponding path program 183 times [2021-06-12 20:13:54,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:54,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095319234] [2021-06-12 20:13:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:54,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:54,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095319234] [2021-06-12 20:13:54,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095319234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:54,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482078594] [2021-06-12 20:13:54,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:54,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:13:54,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:54,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:54,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:54,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482078594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:54,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:54,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:54,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797497683] [2021-06-12 20:13:54,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:54,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:54,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:54,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:54,628 INFO L87 Difference]: Start difference. First operand 341 states and 1024 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:54,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:54,929 INFO L93 Difference]: Finished difference Result 650 states and 1868 transitions. [2021-06-12 20:13:54,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:13:54,930 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:54,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:54,931 INFO L225 Difference]: With dead ends: 650 [2021-06-12 20:13:54,931 INFO L226 Difference]: Without dead ends: 640 [2021-06-12 20:13:54,931 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:13:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-12 20:13:54,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 348. [2021-06-12 20:13:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.9913544668587897) internal successors, (1038), 347 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1038 transitions. [2021-06-12 20:13:54,936 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1038 transitions. Word has length 22 [2021-06-12 20:13:54,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:54,937 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1038 transitions. [2021-06-12 20:13:54,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:54,937 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1038 transitions. [2021-06-12 20:13:54,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:54,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:54,937 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:55,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1877 [2021-06-12 20:13:55,151 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:55,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:55,151 INFO L82 PathProgramCache]: Analyzing trace with hash -189693034, now seen corresponding path program 184 times [2021-06-12 20:13:55,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:55,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001972966] [2021-06-12 20:13:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:55,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:55,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001972966] [2021-06-12 20:13:55,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001972966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:55,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206318778] [2021-06-12 20:13:55,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:55,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:13:55,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:55,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:55,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:55,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206318778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:55,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:55,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:55,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267934705] [2021-06-12 20:13:55,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:55,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:55,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:55,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:55,542 INFO L87 Difference]: Start difference. First operand 348 states and 1038 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:55,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:55,778 INFO L93 Difference]: Finished difference Result 640 states and 1865 transitions. [2021-06-12 20:13:55,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:13:55,778 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:55,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:55,779 INFO L225 Difference]: With dead ends: 640 [2021-06-12 20:13:55,779 INFO L226 Difference]: Without dead ends: 640 [2021-06-12 20:13:55,779 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 282.7ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:13:55,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-12 20:13:55,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 354. [2021-06-12 20:13:55,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.0169971671388103) internal successors, (1065), 353 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1065 transitions. [2021-06-12 20:13:55,785 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1065 transitions. Word has length 22 [2021-06-12 20:13:55,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:55,785 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1065 transitions. [2021-06-12 20:13:55,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:55,785 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1065 transitions. [2021-06-12 20:13:55,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:55,786 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:55,786 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:56,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1889,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:56,010 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:56,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:56,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1701712478, now seen corresponding path program 185 times [2021-06-12 20:13:56,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:56,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561337532] [2021-06-12 20:13:56,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:56,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:56,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561337532] [2021-06-12 20:13:56,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561337532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:56,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377971698] [2021-06-12 20:13:56,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:56,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:13:56,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:56,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:56,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:56,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377971698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:56,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:56,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:56,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679693143] [2021-06-12 20:13:56,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:56,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:56,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:56,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:56,376 INFO L87 Difference]: Start difference. First operand 354 states and 1065 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:56,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:56,748 INFO L93 Difference]: Finished difference Result 631 states and 1817 transitions. [2021-06-12 20:13:56,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:13:56,748 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:56,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:56,749 INFO L225 Difference]: With dead ends: 631 [2021-06-12 20:13:56,749 INFO L226 Difference]: Without dead ends: 622 [2021-06-12 20:13:56,749 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:13:56,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-12 20:13:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 360. [2021-06-12 20:13:56,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.0) internal successors, (1077), 359 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1077 transitions. [2021-06-12 20:13:56,755 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1077 transitions. Word has length 22 [2021-06-12 20:13:56,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:56,755 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 1077 transitions. [2021-06-12 20:13:56,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:56,755 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1077 transitions. [2021-06-12 20:13:56,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:56,756 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:56,756 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:56,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1898,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:56,973 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:56,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:56,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1924272844, now seen corresponding path program 186 times [2021-06-12 20:13:56,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:56,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808105674] [2021-06-12 20:13:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:57,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:57,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808105674] [2021-06-12 20:13:57,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808105674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:57,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175853404] [2021-06-12 20:13:57,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:57,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:13:57,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:57,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:57,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:57,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175853404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:57,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:57,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:13:57,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415798420] [2021-06-12 20:13:57,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:13:57,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:57,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:13:57,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:13:57,434 INFO L87 Difference]: Start difference. First operand 360 states and 1077 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:57,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:57,790 INFO L93 Difference]: Finished difference Result 593 states and 1708 transitions. [2021-06-12 20:13:57,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:13:57,790 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:57,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:57,791 INFO L225 Difference]: With dead ends: 593 [2021-06-12 20:13:57,791 INFO L226 Difference]: Without dead ends: 583 [2021-06-12 20:13:57,791 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 391.2ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:13:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-06-12 20:13:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 372. [2021-06-12 20:13:57,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 3.0053908355795147) internal successors, (1115), 371 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:57,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1115 transitions. [2021-06-12 20:13:57,797 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1115 transitions. Word has length 22 [2021-06-12 20:13:57,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:57,797 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1115 transitions. [2021-06-12 20:13:57,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:57,797 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1115 transitions. [2021-06-12 20:13:57,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:57,798 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:57,798 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:58,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1912,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:58,021 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:58,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2106363156, now seen corresponding path program 187 times [2021-06-12 20:13:58,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:58,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891035357] [2021-06-12 20:13:58,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:58,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:58,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:58,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891035357] [2021-06-12 20:13:58,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891035357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:58,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006352203] [2021-06-12 20:13:58,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:58,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:58,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:58,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006352203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:58,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:58,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:13:58,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156579670] [2021-06-12 20:13:58,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:13:58,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:58,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:13:58,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:13:58,381 INFO L87 Difference]: Start difference. First operand 372 states and 1115 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:58,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:58,689 INFO L93 Difference]: Finished difference Result 624 states and 1771 transitions. [2021-06-12 20:13:58,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:58,689 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:58,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:58,690 INFO L225 Difference]: With dead ends: 624 [2021-06-12 20:13:58,690 INFO L226 Difference]: Without dead ends: 612 [2021-06-12 20:13:58,690 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 304.4ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:13:58,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-12 20:13:58,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 368. [2021-06-12 20:13:58,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.005449591280654) internal successors, (1103), 367 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1103 transitions. [2021-06-12 20:13:58,696 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1103 transitions. Word has length 22 [2021-06-12 20:13:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:58,696 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1103 transitions. [2021-06-12 20:13:58,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:58,696 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1103 transitions. [2021-06-12 20:13:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:58,697 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:58,697 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:58,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1925,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:58,920 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:58,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:58,920 INFO L82 PathProgramCache]: Analyzing trace with hash 311516870, now seen corresponding path program 188 times [2021-06-12 20:13:58,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:58,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649760191] [2021-06-12 20:13:58,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:59,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:59,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649760191] [2021-06-12 20:13:59,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649760191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:59,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602712501] [2021-06-12 20:13:59,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:59,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:13:59,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:59,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:59,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:13:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:59,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602712501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:59,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:13:59,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:13:59,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158501484] [2021-06-12 20:13:59,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:13:59,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:13:59,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:13:59,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:13:59,253 INFO L87 Difference]: Start difference. First operand 368 states and 1103 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:13:59,505 INFO L93 Difference]: Finished difference Result 590 states and 1715 transitions. [2021-06-12 20:13:59,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:13:59,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:13:59,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:13:59,506 INFO L225 Difference]: With dead ends: 590 [2021-06-12 20:13:59,506 INFO L226 Difference]: Without dead ends: 590 [2021-06-12 20:13:59,507 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 273.8ms TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:13:59,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-06-12 20:13:59,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 373. [2021-06-12 20:13:59,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 3.0) internal successors, (1116), 372 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:59,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1116 transitions. [2021-06-12 20:13:59,511 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1116 transitions. Word has length 22 [2021-06-12 20:13:59,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:13:59,511 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 1116 transitions. [2021-06-12 20:13:59,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:13:59,511 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1116 transitions. [2021-06-12 20:13:59,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:13:59,512 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:13:59,512 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:13:59,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1936 [2021-06-12 20:13:59,714 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:13:59,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:13:59,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1806119834, now seen corresponding path program 189 times [2021-06-12 20:13:59,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:13:59,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160508991] [2021-06-12 20:13:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:13:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:13:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:13:59,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:13:59,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160508991] [2021-06-12 20:13:59,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160508991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:13:59,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535257778] [2021-06-12 20:13:59,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:13:59,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:13:59,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:13:59,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:13:59,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:00,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535257778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:00,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:00,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:14:00,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035220927] [2021-06-12 20:14:00,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:14:00,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:00,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:14:00,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:14:00,085 INFO L87 Difference]: Start difference. First operand 373 states and 1116 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:00,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:00,393 INFO L93 Difference]: Finished difference Result 566 states and 1650 transitions. [2021-06-12 20:14:00,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:14:00,393 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:14:00,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:00,394 INFO L225 Difference]: With dead ends: 566 [2021-06-12 20:14:00,394 INFO L226 Difference]: Without dead ends: 556 [2021-06-12 20:14:00,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 265.1ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:14:00,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-12 20:14:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 352. [2021-06-12 20:14:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.9715099715099713) internal successors, (1043), 351 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:00,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1043 transitions. [2021-06-12 20:14:00,399 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1043 transitions. Word has length 22 [2021-06-12 20:14:00,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:00,399 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1043 transitions. [2021-06-12 20:14:00,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:00,400 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1043 transitions. [2021-06-12 20:14:00,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:14:00,400 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:00,400 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:00,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1945,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:00,624 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:00,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:00,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1259786134, now seen corresponding path program 190 times [2021-06-12 20:14:00,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:00,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035154554] [2021-06-12 20:14:00,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:00,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:00,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035154554] [2021-06-12 20:14:00,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035154554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:00,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945343044] [2021-06-12 20:14:00,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:00,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:14:00,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:00,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:14:00,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:00,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945343044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:00,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:00,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:14:00,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47554659] [2021-06-12 20:14:00,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:14:00,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:00,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:14:00,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:14:00,938 INFO L87 Difference]: Start difference. First operand 352 states and 1043 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:01,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:01,164 INFO L93 Difference]: Finished difference Result 495 states and 1468 transitions. [2021-06-12 20:14:01,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:14:01,164 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:14:01,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:01,165 INFO L225 Difference]: With dead ends: 495 [2021-06-12 20:14:01,165 INFO L226 Difference]: Without dead ends: 495 [2021-06-12 20:14:01,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 252.8ms TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:14:01,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-12 20:14:01,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 349. [2021-06-12 20:14:01,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.971264367816092) internal successors, (1034), 348 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1034 transitions. [2021-06-12 20:14:01,169 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1034 transitions. Word has length 22 [2021-06-12 20:14:01,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:01,169 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1034 transitions. [2021-06-12 20:14:01,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:01,169 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1034 transitions. [2021-06-12 20:14:01,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:14:01,170 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:01,170 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:01,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1954,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:01,370 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:01,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:01,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1983718082, now seen corresponding path program 191 times [2021-06-12 20:14:01,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:01,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614340839] [2021-06-12 20:14:01,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:01,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:01,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614340839] [2021-06-12 20:14:01,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614340839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:01,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715495240] [2021-06-12 20:14:01,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:01,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:14:01,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:01,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:14:01,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:01,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715495240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:01,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:01,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:14:01,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028013291] [2021-06-12 20:14:01,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:14:01,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:01,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:14:01,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:14:01,764 INFO L87 Difference]: Start difference. First operand 349 states and 1034 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:02,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:02,016 INFO L93 Difference]: Finished difference Result 544 states and 1562 transitions. [2021-06-12 20:14:02,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:14:02,016 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:14:02,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:02,017 INFO L225 Difference]: With dead ends: 544 [2021-06-12 20:14:02,017 INFO L226 Difference]: Without dead ends: 544 [2021-06-12 20:14:02,017 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 290.2ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:14:02,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-12 20:14:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 357. [2021-06-12 20:14:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.9831460674157304) internal successors, (1062), 356 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1062 transitions. [2021-06-12 20:14:02,023 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1062 transitions. Word has length 22 [2021-06-12 20:14:02,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:02,023 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1062 transitions. [2021-06-12 20:14:02,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:02,023 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1062 transitions. [2021-06-12 20:14:02,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:14:02,023 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:02,023 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:02,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1960 [2021-06-12 20:14:02,238 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:02,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:02,239 INFO L82 PathProgramCache]: Analyzing trace with hash 471698638, now seen corresponding path program 192 times [2021-06-12 20:14:02,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:02,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109782640] [2021-06-12 20:14:02,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:02,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:02,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109782640] [2021-06-12 20:14:02,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109782640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:02,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536925598] [2021-06-12 20:14:02,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:02,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:14:02,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:02,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:14:02,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:02,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536925598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:02,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:02,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:14:02,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254947724] [2021-06-12 20:14:02,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:14:02,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:02,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:14:02,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:14:02,642 INFO L87 Difference]: Start difference. First operand 357 states and 1062 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:02,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:02,968 INFO L93 Difference]: Finished difference Result 490 states and 1410 transitions. [2021-06-12 20:14:02,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:14:02,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:14:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:02,969 INFO L225 Difference]: With dead ends: 490 [2021-06-12 20:14:02,969 INFO L226 Difference]: Without dead ends: 481 [2021-06-12 20:14:02,969 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 351.5ms TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:14:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-12 20:14:02,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 357. [2021-06-12 20:14:02,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.955056179775281) internal successors, (1052), 356 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:02,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1052 transitions. [2021-06-12 20:14:02,973 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1052 transitions. Word has length 22 [2021-06-12 20:14:02,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:02,973 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1052 transitions. [2021-06-12 20:14:02,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:02,973 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1052 transitions. [2021-06-12 20:14:02,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:14:02,974 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:02,974 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:03,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1965,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:03,174 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:03,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:03,174 INFO L82 PathProgramCache]: Analyzing trace with hash 293775178, now seen corresponding path program 193 times [2021-06-12 20:14:03,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:03,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774053472] [2021-06-12 20:14:03,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:03,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:03,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:03,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774053472] [2021-06-12 20:14:03,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774053472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:03,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466271853] [2021-06-12 20:14:03,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:03,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:14:03,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:03,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466271853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:03,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:03,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:14:03,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143845259] [2021-06-12 20:14:03,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:14:03,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:03,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:14:03,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:14:03,550 INFO L87 Difference]: Start difference. First operand 357 states and 1052 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:03,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:03,882 INFO L93 Difference]: Finished difference Result 454 states and 1342 transitions. [2021-06-12 20:14:03,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:14:03,882 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:14:03,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:03,883 INFO L225 Difference]: With dead ends: 454 [2021-06-12 20:14:03,883 INFO L226 Difference]: Without dead ends: 454 [2021-06-12 20:14:03,883 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 280.2ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:14:03,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-12 20:14:03,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 324. [2021-06-12 20:14:03,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.9473684210526314) internal successors, (952), 323 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 952 transitions. [2021-06-12 20:14:03,888 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 952 transitions. Word has length 22 [2021-06-12 20:14:03,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:03,888 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 952 transitions. [2021-06-12 20:14:03,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:03,888 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 952 transitions. [2021-06-12 20:14:03,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:14:03,889 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:03,889 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:04,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1970 [2021-06-12 20:14:04,105 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:04,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:04,105 INFO L82 PathProgramCache]: Analyzing trace with hash 483357642, now seen corresponding path program 194 times [2021-06-12 20:14:04,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:04,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211809722] [2021-06-12 20:14:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:14:04,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:04,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211809722] [2021-06-12 20:14:04,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211809722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:04,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133517029] [2021-06-12 20:14:04,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:04,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:14:04,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:04,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:14:04,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:04,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133517029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:04,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:04,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:14:04,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413525224] [2021-06-12 20:14:04,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:14:04,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:04,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:14:04,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:14:04,396 INFO L87 Difference]: Start difference. First operand 324 states and 952 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:04,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:04,960 INFO L93 Difference]: Finished difference Result 716 states and 2103 transitions. [2021-06-12 20:14:04,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:14:04,960 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:14:04,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:04,961 INFO L225 Difference]: With dead ends: 716 [2021-06-12 20:14:04,961 INFO L226 Difference]: Without dead ends: 614 [2021-06-12 20:14:04,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 360.9ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:14:04,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-12 20:14:04,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 309. [2021-06-12 20:14:04,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.9448051948051948) internal successors, (907), 308 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:04,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-06-12 20:14:04,965 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 22 [2021-06-12 20:14:04,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:04,966 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-06-12 20:14:04,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:04,966 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-06-12 20:14:04,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:14:04,966 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:04,966 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:05,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1974,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:05,167 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:05,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:05,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1787383922, now seen corresponding path program 195 times [2021-06-12 20:14:05,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:05,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44372612] [2021-06-12 20:14:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:14:05,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:05,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44372612] [2021-06-12 20:14:05,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44372612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:05,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97892138] [2021-06-12 20:14:05,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:05,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:14:05,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:05,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:14:05,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:14:05,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97892138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:05,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:05,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 20:14:05,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062760406] [2021-06-12 20:14:05,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:14:05,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:05,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:14:05,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:14:05,512 INFO L87 Difference]: Start difference. First operand 309 states and 907 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:05,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:05,658 INFO L93 Difference]: Finished difference Result 627 states and 1817 transitions. [2021-06-12 20:14:05,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:14:05,659 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:14:05,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:05,659 INFO L225 Difference]: With dead ends: 627 [2021-06-12 20:14:05,660 INFO L226 Difference]: Without dead ends: 576 [2021-06-12 20:14:05,660 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 151.9ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:14:05,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-12 20:14:05,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 329. [2021-06-12 20:14:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.0091463414634148) internal successors, (987), 328 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:05,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 987 transitions. [2021-06-12 20:14:05,665 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 987 transitions. Word has length 22 [2021-06-12 20:14:05,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:05,665 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 987 transitions. [2021-06-12 20:14:05,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:05,665 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 987 transitions. [2021-06-12 20:14:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:14:05,666 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:05,666 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:05,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1977 [2021-06-12 20:14:05,885 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:05,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:05,885 INFO L82 PathProgramCache]: Analyzing trace with hash -772869444, now seen corresponding path program 196 times [2021-06-12 20:14:05,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:05,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023508463] [2021-06-12 20:14:05,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:14:05,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:05,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023508463] [2021-06-12 20:14:05,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023508463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:05,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359342156] [2021-06-12 20:14:05,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:06,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:14:06,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:06,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:14:06,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:06,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:06,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359342156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:06,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:06,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 20:14:06,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073867034] [2021-06-12 20:14:06,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:14:06,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:06,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:14:06,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:14:06,236 INFO L87 Difference]: Start difference. First operand 329 states and 987 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:07,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:07,375 INFO L93 Difference]: Finished difference Result 999 states and 2873 transitions. [2021-06-12 20:14:07,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:14:07,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:14:07,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:07,377 INFO L225 Difference]: With dead ends: 999 [2021-06-12 20:14:07,377 INFO L226 Difference]: Without dead ends: 858 [2021-06-12 20:14:07,377 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 815.0ms TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:14:07,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-06-12 20:14:07,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 339. [2021-06-12 20:14:07,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.9792899408284024) internal successors, (1007), 338 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1007 transitions. [2021-06-12 20:14:07,383 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1007 transitions. Word has length 22 [2021-06-12 20:14:07,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:07,383 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1007 transitions. [2021-06-12 20:14:07,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:07,383 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1007 transitions. [2021-06-12 20:14:07,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:14:07,384 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:07,384 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:07,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1988,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:07,601 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:07,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:07,601 INFO L82 PathProgramCache]: Analyzing trace with hash 400799254, now seen corresponding path program 197 times [2021-06-12 20:14:07,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:07,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762307002] [2021-06-12 20:14:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:14:07,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:07,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762307002] [2021-06-12 20:14:07,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762307002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:07,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239095803] [2021-06-12 20:14:07,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:07,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:14:07,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:07,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:14:07,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:07,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239095803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:07,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:07,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 20:14:07,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315938622] [2021-06-12 20:14:07,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:14:07,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:07,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:14:07,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:14:07,933 INFO L87 Difference]: Start difference. First operand 339 states and 1007 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:08,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:08,675 INFO L93 Difference]: Finished difference Result 816 states and 2373 transitions. [2021-06-12 20:14:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:14:08,675 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:14:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:08,677 INFO L225 Difference]: With dead ends: 816 [2021-06-12 20:14:08,677 INFO L226 Difference]: Without dead ends: 714 [2021-06-12 20:14:08,677 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 538.4ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:14:08,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-06-12 20:14:08,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 304. [2021-06-12 20:14:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:08,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2021-06-12 20:14:08,682 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2021-06-12 20:14:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:08,683 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2021-06-12 20:14:08,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:08,683 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2021-06-12 20:14:08,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:14:08,683 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:08,683 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:08,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1993,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:08,908 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:08,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:08,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1757356874, now seen corresponding path program 198 times [2021-06-12 20:14:08,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:08,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826595520] [2021-06-12 20:14:08,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:09,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:09,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826595520] [2021-06-12 20:14:09,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826595520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:09,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451827704] [2021-06-12 20:14:09,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:09,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:14:09,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:09,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:14:09,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:09,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451827704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:09,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:09,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:14:09,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580110273] [2021-06-12 20:14:09,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:14:09,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:09,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:14:09,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:14:09,263 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:09,728 INFO L93 Difference]: Finished difference Result 674 states and 1948 transitions. [2021-06-12 20:14:09,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:14:09,728 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:14:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:09,729 INFO L225 Difference]: With dead ends: 674 [2021-06-12 20:14:09,730 INFO L226 Difference]: Without dead ends: 607 [2021-06-12 20:14:09,730 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 381.1ms TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:14:09,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-12 20:14:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 325. [2021-06-12 20:14:09,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.990740740740741) internal successors, (969), 324 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:09,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 969 transitions. [2021-06-12 20:14:09,735 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 969 transitions. Word has length 22 [2021-06-12 20:14:09,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:09,735 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 969 transitions. [2021-06-12 20:14:09,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:09,735 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 969 transitions. [2021-06-12 20:14:09,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:14:09,735 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:09,736 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:09,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2000,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:09,936 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:09,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:09,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1523095944, now seen corresponding path program 199 times [2021-06-12 20:14:09,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:09,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856781217] [2021-06-12 20:14:09,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:10,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:10,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856781217] [2021-06-12 20:14:10,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856781217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:10,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26065543] [2021-06-12 20:14:10,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:10,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:14:10,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:10,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:10,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:10,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:14:10,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:10,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:10,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:10,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:14:10,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:10,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:10,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:10,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:14:10,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:10,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:14:10,646 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:10,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:10,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:14:10,684 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:130, output treesize:51 [2021-06-12 20:14:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:10,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26065543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:10,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:10,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:14:10,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915813981] [2021-06-12 20:14:10,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:14:10,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:10,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:14:10,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:14:10,824 INFO L87 Difference]: Start difference. First operand 325 states and 969 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:11,481 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-06-12 20:14:11,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:11,685 INFO L93 Difference]: Finished difference Result 724 states and 2053 transitions. [2021-06-12 20:14:11,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:14:11,686 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:14:11,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:11,687 INFO L225 Difference]: With dead ends: 724 [2021-06-12 20:14:11,687 INFO L226 Difference]: Without dead ends: 628 [2021-06-12 20:14:11,687 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 759.1ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:14:11,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-06-12 20:14:11,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 318. [2021-06-12 20:14:11,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.968454258675079) internal successors, (941), 317 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 941 transitions. [2021-06-12 20:14:11,692 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 941 transitions. Word has length 22 [2021-06-12 20:14:11,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:11,692 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 941 transitions. [2021-06-12 20:14:11,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:11,692 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 941 transitions. [2021-06-12 20:14:11,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:14:11,693 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:11,693 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:11,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2022,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:11,913 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:11,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:11,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2110841266, now seen corresponding path program 200 times [2021-06-12 20:14:11,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:11,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863419153] [2021-06-12 20:14:11,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:12,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:12,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863419153] [2021-06-12 20:14:12,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863419153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:12,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848768640] [2021-06-12 20:14:12,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:12,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:14:12,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:12,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:14:12,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:12,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:12,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:12,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:14:12,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:12,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:12,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:12,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:14:12,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:12,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:12,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:12,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:14:12,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:12,413 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:14:12,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:12,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:12,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-12 20:14:12,446 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:130, output treesize:51 [2021-06-12 20:14:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:12,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848768640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:12,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:12,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:14:12,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323753337] [2021-06-12 20:14:12,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:14:12,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:12,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:14:12,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:14:12,570 INFO L87 Difference]: Start difference. First operand 318 states and 941 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:13,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:13,058 INFO L93 Difference]: Finished difference Result 418 states and 1234 transitions. [2021-06-12 20:14:13,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:14:13,058 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:14:13,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:13,059 INFO L225 Difference]: With dead ends: 418 [2021-06-12 20:14:13,059 INFO L226 Difference]: Without dead ends: 400 [2021-06-12 20:14:13,059 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 555.9ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:14:13,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-12 20:14:13,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 326. [2021-06-12 20:14:13,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.9692307692307693) internal successors, (965), 325 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 965 transitions. [2021-06-12 20:14:13,064 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 965 transitions. Word has length 22 [2021-06-12 20:14:13,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:13,064 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 965 transitions. [2021-06-12 20:14:13,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:13,064 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 965 transitions. [2021-06-12 20:14:13,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:14:13,064 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:13,064 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:13,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2056 [2021-06-12 20:14:13,285 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:13,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:13,285 INFO L82 PathProgramCache]: Analyzing trace with hash 871558594, now seen corresponding path program 201 times [2021-06-12 20:14:13,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:13,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717183482] [2021-06-12 20:14:13,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:13,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:13,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717183482] [2021-06-12 20:14:13,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717183482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:13,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485909621] [2021-06-12 20:14:13,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:13,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:14:13,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:13,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:14:13,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:13,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:13,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:14:13,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:13,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:13,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:14:13,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:34 [2021-06-12 20:14:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:13,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485909621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:13,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:13,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:14:13,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352255934] [2021-06-12 20:14:13,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:14:13,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:13,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:14:13,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:14:13,963 INFO L87 Difference]: Start difference. First operand 326 states and 965 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:14,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:14,351 INFO L93 Difference]: Finished difference Result 774 states and 2239 transitions. [2021-06-12 20:14:14,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:14:14,351 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:14:14,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:14,352 INFO L225 Difference]: With dead ends: 774 [2021-06-12 20:14:14,352 INFO L226 Difference]: Without dead ends: 707 [2021-06-12 20:14:14,353 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 312.2ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:14:14,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-06-12 20:14:14,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 354. [2021-06-12 20:14:14,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 3.0509915014164304) internal successors, (1077), 353 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:14,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1077 transitions. [2021-06-12 20:14:14,358 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1077 transitions. Word has length 22 [2021-06-12 20:14:14,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:14,359 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1077 transitions. [2021-06-12 20:14:14,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:14,359 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1077 transitions. [2021-06-12 20:14:14,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:14:14,372 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:14,372 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:14,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2085,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:14,605 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:14,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:14,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1886073072, now seen corresponding path program 202 times [2021-06-12 20:14:14,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:14,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578840183] [2021-06-12 20:14:14,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:14:14,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:14,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578840183] [2021-06-12 20:14:14,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578840183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:14,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975919433] [2021-06-12 20:14:14,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:14,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:14:14,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:14,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:14:14,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:14,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:14,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:14:14,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:14,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:14,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:14:14,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:32 [2021-06-12 20:14:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:15,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975919433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:15,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:15,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 20:14:15,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570859738] [2021-06-12 20:14:15,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:14:15,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:15,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:14:15,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:14:15,179 INFO L87 Difference]: Start difference. First operand 354 states and 1077 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:15,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:15,467 INFO L93 Difference]: Finished difference Result 702 states and 2030 transitions. [2021-06-12 20:14:15,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:14:15,467 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:14:15,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:15,467 INFO L225 Difference]: With dead ends: 702 [2021-06-12 20:14:15,468 INFO L226 Difference]: Without dead ends: 606 [2021-06-12 20:14:15,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:14:15,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-12 20:14:15,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 367. [2021-06-12 20:14:15,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.010928961748634) internal successors, (1102), 366 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:15,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1102 transitions. [2021-06-12 20:14:15,473 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1102 transitions. Word has length 22 [2021-06-12 20:14:15,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:15,473 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 1102 transitions. [2021-06-12 20:14:15,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:15,473 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1102 transitions. [2021-06-12 20:14:15,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:14:15,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:15,473 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:15,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2172,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:15,681 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:15,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:15,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1235225526, now seen corresponding path program 203 times [2021-06-12 20:14:15,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:15,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490508169] [2021-06-12 20:14:15,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:15,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:15,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490508169] [2021-06-12 20:14:15,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490508169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:15,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525639118] [2021-06-12 20:14:15,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:15,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:14:15,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:15,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:14:15,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:15,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:15,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:14:15,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:15,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:15,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:14:15,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:30 [2021-06-12 20:14:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:16,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525639118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:16,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:16,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:14:16,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272412611] [2021-06-12 20:14:16,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:14:16,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:16,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:14:16,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:14:16,021 INFO L87 Difference]: Start difference. First operand 367 states and 1102 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:16,470 INFO L93 Difference]: Finished difference Result 533 states and 1563 transitions. [2021-06-12 20:14:16,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:14:16,470 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:14:16,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:16,471 INFO L225 Difference]: With dead ends: 533 [2021-06-12 20:14:16,471 INFO L226 Difference]: Without dead ends: 466 [2021-06-12 20:14:16,471 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:14:16,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-12 20:14:16,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 323. [2021-06-12 20:14:16,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.968944099378882) internal successors, (956), 322 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 956 transitions. [2021-06-12 20:14:16,474 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 956 transitions. Word has length 22 [2021-06-12 20:14:16,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:16,475 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 956 transitions. [2021-06-12 20:14:16,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:16,475 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 956 transitions. [2021-06-12 20:14:16,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:14:16,475 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:16,475 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:16,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2228,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:16,675 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:16,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:16,676 INFO L82 PathProgramCache]: Analyzing trace with hash 343747060, now seen corresponding path program 204 times [2021-06-12 20:14:16,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:16,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674138409] [2021-06-12 20:14:16,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:16,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:16,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:16,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674138409] [2021-06-12 20:14:16,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674138409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:16,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834280252] [2021-06-12 20:14:16,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:16,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:14:16,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:16,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:14:16,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:17,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:17,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:17,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:14:17,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:17,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:17,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:17,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:14:17,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:17,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:17,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:17,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:14:17,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:17,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:17,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:14:17,200 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:17,279 INFO L628 ElimStorePlain]: treesize reduction 20, result has 79.6 percent of original size [2021-06-12 20:14:17,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2021-06-12 20:14:17,281 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:177, output treesize:78 [2021-06-12 20:14:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:17,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834280252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:17,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:17,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:14:17,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786661814] [2021-06-12 20:14:17,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:14:17,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:17,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:14:17,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:14:17,463 INFO L87 Difference]: Start difference. First operand 323 states and 956 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:17,905 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-06-12 20:14:18,103 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-12 20:14:18,234 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-06-12 20:14:18,553 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-06-12 20:14:18,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:18,593 INFO L93 Difference]: Finished difference Result 585 states and 1689 transitions. [2021-06-12 20:14:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:14:18,593 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:14:18,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:18,594 INFO L225 Difference]: With dead ends: 585 [2021-06-12 20:14:18,594 INFO L226 Difference]: Without dead ends: 424 [2021-06-12 20:14:18,594 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1122.0ms TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:14:18,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-12 20:14:18,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 316. [2021-06-12 20:14:18,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.961904761904762) internal successors, (933), 315 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 933 transitions. [2021-06-12 20:14:18,597 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 933 transitions. Word has length 22 [2021-06-12 20:14:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:18,597 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 933 transitions. [2021-06-12 20:14:18,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:18,597 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 933 transitions. [2021-06-12 20:14:18,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 20:14:18,598 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:18,598 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:18,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2240,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:18,798 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:18,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:18,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1676379422, now seen corresponding path program 205 times [2021-06-12 20:14:18,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:18,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392097089] [2021-06-12 20:14:18,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:19,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:19,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392097089] [2021-06-12 20:14:19,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392097089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:19,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378430298] [2021-06-12 20:14:19,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:19,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:14:19,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:19,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:19,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:19,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:14:19,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:19,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:19,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:19,474 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-06-12 20:14:19,475 INFO L628 ElimStorePlain]: treesize reduction 71, result has 69.8 percent of original size [2021-06-12 20:14:19,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:19,479 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:19,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:19,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:19,567 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:19,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:19,571 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:19,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:19,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:19,667 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:19,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:19,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-12 20:14:19,756 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:247, output treesize:150 [2021-06-12 20:14:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:19,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378430298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:19,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:19,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:14:19,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127458745] [2021-06-12 20:14:19,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:14:19,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:19,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:14:19,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:14:19,963 INFO L87 Difference]: Start difference. First operand 316 states and 933 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:20,301 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-06-12 20:14:21,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:21,002 INFO L93 Difference]: Finished difference Result 497 states and 1429 transitions. [2021-06-12 20:14:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:14:21,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 20:14:21,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:21,005 INFO L225 Difference]: With dead ends: 497 [2021-06-12 20:14:21,005 INFO L226 Difference]: Without dead ends: 386 [2021-06-12 20:14:21,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1095.5ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:14:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-12 20:14:21,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 304. [2021-06-12 20:14:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.943894389438944) internal successors, (892), 303 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:21,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 892 transitions. [2021-06-12 20:14:21,010 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 892 transitions. Word has length 22 [2021-06-12 20:14:21,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:21,010 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 892 transitions. [2021-06-12 20:14:21,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:21,010 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 892 transitions. [2021-06-12 20:14:21,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:14:21,011 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:21,011 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:21,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2324 [2021-06-12 20:14:21,233 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:21,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:21,234 INFO L82 PathProgramCache]: Analyzing trace with hash -410758918, now seen corresponding path program 206 times [2021-06-12 20:14:21,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:21,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990473814] [2021-06-12 20:14:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:14:21,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:21,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990473814] [2021-06-12 20:14:21,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990473814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:21,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947095889] [2021-06-12 20:14:21,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:21,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:14:21,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:21,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:14:21,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:21,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:21,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:21,609 INFO L628 ElimStorePlain]: treesize reduction 26, result has 77.2 percent of original size [2021-06-12 20:14:21,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:21,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:21,680 INFO L628 ElimStorePlain]: treesize reduction 19, result has 77.4 percent of original size [2021-06-12 20:14:21,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:21,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:21,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:21,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:21,722 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:21,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:21,753 INFO L518 ElimStorePlain]: Eliminatee v_prenex_52 vanished before elimination [2021-06-12 20:14:21,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:14:21,756 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:117, output treesize:50 [2021-06-12 20:14:22,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:22,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:22,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:14:22,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:22,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:22,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:22,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:14:22,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:22,345 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:14:22,346 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:22,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:14:22,351 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:22,460 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-12 20:14:22,460 INFO L628 ElimStorePlain]: treesize reduction 133, result has 42.7 percent of original size [2021-06-12 20:14:22,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:22,464 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:22,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:22,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:14:22,509 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:306, output treesize:70 [2021-06-12 20:14:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:14:22,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947095889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:22,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:22,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:14:22,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673878332] [2021-06-12 20:14:22,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:14:22,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:22,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:14:22,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:14:22,659 INFO L87 Difference]: Start difference. First operand 304 states and 892 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:23,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:23,601 INFO L93 Difference]: Finished difference Result 860 states and 2502 transitions. [2021-06-12 20:14:23,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:14:23,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:14:23,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:23,602 INFO L225 Difference]: With dead ends: 860 [2021-06-12 20:14:23,602 INFO L226 Difference]: Without dead ends: 766 [2021-06-12 20:14:23,602 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1064.4ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:14:23,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-06-12 20:14:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 333. [2021-06-12 20:14:23,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 3.0542168674698793) internal successors, (1014), 332 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1014 transitions. [2021-06-12 20:14:23,607 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1014 transitions. Word has length 23 [2021-06-12 20:14:23,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:23,607 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1014 transitions. [2021-06-12 20:14:23,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:23,607 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1014 transitions. [2021-06-12 20:14:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:14:23,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:23,607 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:23,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2352,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:23,808 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:23,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:23,808 INFO L82 PathProgramCache]: Analyzing trace with hash -2116971352, now seen corresponding path program 207 times [2021-06-12 20:14:23,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:23,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343014182] [2021-06-12 20:14:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:23,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:14:23,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:23,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343014182] [2021-06-12 20:14:23,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343014182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:23,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871301852] [2021-06-12 20:14:23,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:24,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:14:24,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:24,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:14:24,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:24,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:24,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:24,213 INFO L628 ElimStorePlain]: treesize reduction 31, result has 73.9 percent of original size [2021-06-12 20:14:24,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:24,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:24,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:24,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:24,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:24,223 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:24,270 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-12 20:14:24,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:14:24,272 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:122, output treesize:50 [2021-06-12 20:14:24,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:24,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:24,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:14:24,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:24,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:24,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:24,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:14:24,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:24,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:24,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:24,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:14:24,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:24,632 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:14:24,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:24,683 INFO L628 ElimStorePlain]: treesize reduction 29, result has 59.7 percent of original size [2021-06-12 20:14:24,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:14:24,685 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-06-12 20:14:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:14:24,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871301852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:24,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:24,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-12 20:14:24,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832459932] [2021-06-12 20:14:24,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:14:24,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:24,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:14:24,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:14:24,753 INFO L87 Difference]: Start difference. First operand 333 states and 1014 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:27,527 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-12 20:14:28,270 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2021-06-12 20:14:28,682 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-06-12 20:14:28,817 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-06-12 20:14:29,218 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-12 20:14:29,348 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-06-12 20:14:29,487 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-12 20:14:29,653 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-06-12 20:14:29,809 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-12 20:14:29,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:29,927 INFO L93 Difference]: Finished difference Result 1183 states and 3328 transitions. [2021-06-12 20:14:29,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:14:29,928 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:14:29,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:29,929 INFO L225 Difference]: With dead ends: 1183 [2021-06-12 20:14:29,929 INFO L226 Difference]: Without dead ends: 983 [2021-06-12 20:14:29,929 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 4738.9ms TimeCoverageRelationStatistics Valid=596, Invalid=3564, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 20:14:29,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-06-12 20:14:29,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 404. [2021-06-12 20:14:29,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 3.129032258064516) internal successors, (1261), 403 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:29,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1261 transitions. [2021-06-12 20:14:29,935 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1261 transitions. Word has length 23 [2021-06-12 20:14:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:29,935 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1261 transitions. [2021-06-12 20:14:29,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:29,935 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1261 transitions. [2021-06-12 20:14:29,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:14:29,935 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:29,935 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:30,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2509,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:30,136 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:30,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:30,136 INFO L82 PathProgramCache]: Analyzing trace with hash -305065448, now seen corresponding path program 208 times [2021-06-12 20:14:30,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:30,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968099977] [2021-06-12 20:14:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:14:30,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:30,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968099977] [2021-06-12 20:14:30,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968099977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:30,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641788503] [2021-06-12 20:14:30,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:30,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:14:30,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:30,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:14:30,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:30,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:30,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:30,517 INFO L628 ElimStorePlain]: treesize reduction 31, result has 73.9 percent of original size [2021-06-12 20:14:30,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:30,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:30,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:30,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:30,558 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:30,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:30,561 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:30,609 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-12 20:14:30,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:14:30,611 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:122, output treesize:50 [2021-06-12 20:14:31,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:31,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:31,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:14:31,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:31,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:31,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:31,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:14:31,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:31,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:31,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:31,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:14:31,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:31,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:14:31,033 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:31,070 INFO L628 ElimStorePlain]: treesize reduction 29, result has 59.7 percent of original size [2021-06-12 20:14:31,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:14:31,071 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-06-12 20:14:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:14:31,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641788503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:31,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:31,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-12 20:14:31,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323543204] [2021-06-12 20:14:31,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:14:31,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:31,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:14:31,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:14:31,142 INFO L87 Difference]: Start difference. First operand 404 states and 1261 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:34,007 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-12 20:14:34,165 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-12 20:14:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:34,208 INFO L93 Difference]: Finished difference Result 977 states and 2802 transitions. [2021-06-12 20:14:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:14:34,209 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:14:34,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:34,210 INFO L225 Difference]: With dead ends: 977 [2021-06-12 20:14:34,210 INFO L226 Difference]: Without dead ends: 823 [2021-06-12 20:14:34,210 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 2744.0ms TimeCoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:14:34,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-06-12 20:14:34,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 427. [2021-06-12 20:14:34,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.1103286384976525) internal successors, (1325), 426 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:34,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1325 transitions. [2021-06-12 20:14:34,217 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1325 transitions. Word has length 23 [2021-06-12 20:14:34,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:34,218 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1325 transitions. [2021-06-12 20:14:34,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:34,218 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1325 transitions. [2021-06-12 20:14:34,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:14:34,218 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:34,219 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:34,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2563 [2021-06-12 20:14:34,419 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:34,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:34,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1627372824, now seen corresponding path program 209 times [2021-06-12 20:14:34,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:34,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982195962] [2021-06-12 20:14:34,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:14:34,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:34,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982195962] [2021-06-12 20:14:34,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982195962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:34,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664327326] [2021-06-12 20:14:34,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:34,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:14:34,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:34,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:14:34,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:34,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:34,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:34,762 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.7 percent of original size [2021-06-12 20:14:34,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:34,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:34,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:34,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:34,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:34,772 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:34,819 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-12 20:14:34,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:14:34,821 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:95, output treesize:50 [2021-06-12 20:14:35,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:35,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:35,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:14:35,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:35,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:35,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:35,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:14:35,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:35,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:14:35,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:35,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:35,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:14:35,061 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:82, output treesize:20 [2021-06-12 20:14:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:14:35,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664327326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:35,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:35,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:14:35,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226773618] [2021-06-12 20:14:35,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:14:35,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:35,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:14:35,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:14:35,119 INFO L87 Difference]: Start difference. First operand 427 states and 1325 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:36,807 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-06-12 20:14:37,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:37,432 INFO L93 Difference]: Finished difference Result 970 states and 2782 transitions. [2021-06-12 20:14:37,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:14:37,432 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:14:37,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:37,433 INFO L225 Difference]: With dead ends: 970 [2021-06-12 20:14:37,433 INFO L226 Difference]: Without dead ends: 830 [2021-06-12 20:14:37,433 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2033.4ms TimeCoverageRelationStatistics Valid=336, Invalid=1470, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:14:37,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-12 20:14:37,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 517. [2021-06-12 20:14:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 3.011627906976744) internal successors, (1554), 516 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1554 transitions. [2021-06-12 20:14:37,439 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1554 transitions. Word has length 23 [2021-06-12 20:14:37,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:37,439 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1554 transitions. [2021-06-12 20:14:37,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:37,439 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1554 transitions. [2021-06-12 20:14:37,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:14:37,440 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:37,440 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:37,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2641,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:37,640 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:37,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:37,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1406216122, now seen corresponding path program 210 times [2021-06-12 20:14:37,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:37,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478834673] [2021-06-12 20:14:37,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:14:37,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:37,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478834673] [2021-06-12 20:14:37,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478834673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:37,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061052787] [2021-06-12 20:14:37,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:37,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:14:37,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:37,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:14:37,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:37,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:37,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:38,017 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-12 20:14:38,018 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.9 percent of original size [2021-06-12 20:14:38,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:38,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:38,086 INFO L628 ElimStorePlain]: treesize reduction 50, result has 58.7 percent of original size [2021-06-12 20:14:38,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:38,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:38,143 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.6 percent of original size [2021-06-12 20:14:38,143 INFO L518 ElimStorePlain]: Eliminatee v_prenex_63 vanished before elimination [2021-06-12 20:14:38,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:14:38,145 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:132, output treesize:57 [2021-06-12 20:14:38,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:38,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:38,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:14:38,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:38,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:38,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:38,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:14:38,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:38,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:38,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:38,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:14:38,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:38,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:38,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:14:38,891 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:39,048 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-12 20:14:39,049 INFO L628 ElimStorePlain]: treesize reduction 99, result has 55.2 percent of original size [2021-06-12 20:14:39,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:39,055 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:39,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:39,060 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:39,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:39,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 20:14:39,131 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:301, output treesize:78 [2021-06-12 20:14:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:14:39,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061052787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:39,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:39,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:14:39,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358931538] [2021-06-12 20:14:39,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:14:39,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:39,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:14:39,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:14:39,362 INFO L87 Difference]: Start difference. First operand 517 states and 1554 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:41,283 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2021-06-12 20:14:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:42,034 INFO L93 Difference]: Finished difference Result 1104 states and 3228 transitions. [2021-06-12 20:14:42,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:14:42,034 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:14:42,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:42,036 INFO L225 Difference]: With dead ends: 1104 [2021-06-12 20:14:42,036 INFO L226 Difference]: Without dead ends: 897 [2021-06-12 20:14:42,036 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 2015.9ms TimeCoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:14:42,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-06-12 20:14:42,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 558. [2021-06-12 20:14:42,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.0215439856373427) internal successors, (1683), 557 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1683 transitions. [2021-06-12 20:14:42,044 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1683 transitions. Word has length 23 [2021-06-12 20:14:42,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:42,044 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 1683 transitions. [2021-06-12 20:14:42,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:42,044 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1683 transitions. [2021-06-12 20:14:42,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:14:42,044 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:42,045 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:42,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2678 [2021-06-12 20:14:42,269 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:42,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:42,269 INFO L82 PathProgramCache]: Analyzing trace with hash 637122102, now seen corresponding path program 211 times [2021-06-12 20:14:42,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:42,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068812746] [2021-06-12 20:14:42,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:14:42,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:42,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068812746] [2021-06-12 20:14:42,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068812746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:42,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923055930] [2021-06-12 20:14:42,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:42,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:14:42,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:42,779 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_68, v_prenex_69, ends_with_2, v_prenex_70], 1=[ends_with_6]} [2021-06-12 20:14:42,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:42,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:42,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:14:42,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:42,884 INFO L628 ElimStorePlain]: treesize reduction 124, result has 39.5 percent of original size [2021-06-12 20:14:42,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:42,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:42,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:42,931 INFO L518 ElimStorePlain]: Eliminatee ends_with_2 vanished before elimination [2021-06-12 20:14:42,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:42,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:43,013 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.6 percent of original size [2021-06-12 20:14:43,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:43,018 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:43,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:43,022 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:43,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:43,026 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:43,081 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.4 percent of original size [2021-06-12 20:14:43,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:14:43,083 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:241, output treesize:35 [2021-06-12 20:14:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:14:43,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923055930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:43,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:43,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:14:43,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891239727] [2021-06-12 20:14:43,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:14:43,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:43,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:14:43,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:14:43,169 INFO L87 Difference]: Start difference. First operand 558 states and 1683 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:43,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:43,462 INFO L93 Difference]: Finished difference Result 750 states and 2242 transitions. [2021-06-12 20:14:43,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:14:43,463 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:14:43,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:43,464 INFO L225 Difference]: With dead ends: 750 [2021-06-12 20:14:43,464 INFO L226 Difference]: Without dead ends: 696 [2021-06-12 20:14:43,464 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 332.2ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:14:43,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-06-12 20:14:43,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 558. [2021-06-12 20:14:43,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.0215439856373427) internal successors, (1683), 557 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1683 transitions. [2021-06-12 20:14:43,472 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1683 transitions. Word has length 23 [2021-06-12 20:14:43,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:43,472 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 1683 transitions. [2021-06-12 20:14:43,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:43,472 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1683 transitions. [2021-06-12 20:14:43,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:14:43,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:43,472 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:43,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2837,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:43,673 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:43,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:43,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1079785372, now seen corresponding path program 212 times [2021-06-12 20:14:43,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:43,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235477072] [2021-06-12 20:14:43,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:14:43,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:43,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235477072] [2021-06-12 20:14:43,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235477072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:43,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973039360] [2021-06-12 20:14:43,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:43,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:14:43,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:43,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:14:43,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:44,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:44,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:44,130 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-06-12 20:14:44,131 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.2 percent of original size [2021-06-12 20:14:44,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:44,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:44,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:44,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:44,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:44,143 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:44,231 INFO L628 ElimStorePlain]: treesize reduction 22, result has 75.3 percent of original size [2021-06-12 20:14:44,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:14:44,235 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:107, output treesize:59 [2021-06-12 20:14:44,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:44,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:44,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:14:44,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:44,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:44,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:44,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:14:44,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:44,452 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:14:44,453 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:44,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:44,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:14:44,457 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:44,568 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-12 20:14:44,568 INFO L628 ElimStorePlain]: treesize reduction 136, result has 42.1 percent of original size [2021-06-12 20:14:44,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:44,572 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:44,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:44,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:14:44,620 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:309, output treesize:70 [2021-06-12 20:14:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:14:44,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973039360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:44,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:44,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:14:44,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064318724] [2021-06-12 20:14:44,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:14:44,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:44,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:14:44,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:14:44,785 INFO L87 Difference]: Start difference. First operand 558 states and 1683 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:45,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:45,680 INFO L93 Difference]: Finished difference Result 1129 states and 3259 transitions. [2021-06-12 20:14:45,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:14:45,680 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:14:45,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:45,682 INFO L225 Difference]: With dead ends: 1129 [2021-06-12 20:14:45,682 INFO L226 Difference]: Without dead ends: 967 [2021-06-12 20:14:45,682 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 984.7ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:14:45,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-06-12 20:14:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 588. [2021-06-12 20:14:45,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 3.110732538330494) internal successors, (1826), 587 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:45,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1826 transitions. [2021-06-12 20:14:45,689 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1826 transitions. Word has length 23 [2021-06-12 20:14:45,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:45,690 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1826 transitions. [2021-06-12 20:14:45,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:45,690 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1826 transitions. [2021-06-12 20:14:45,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:14:45,690 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:45,690 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:45,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2876 [2021-06-12 20:14:45,891 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:45,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:45,891 INFO L82 PathProgramCache]: Analyzing trace with hash 353330104, now seen corresponding path program 213 times [2021-06-12 20:14:45,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:45,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287540703] [2021-06-12 20:14:45,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:46,157 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-12 20:14:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:14:46,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:46,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287540703] [2021-06-12 20:14:46,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287540703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:46,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041627821] [2021-06-12 20:14:46,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:46,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:14:46,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:46,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:14:46,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:46,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:46,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:46,614 INFO L628 ElimStorePlain]: treesize reduction 34, result has 74.6 percent of original size [2021-06-12 20:14:46,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:46,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:46,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:46,622 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:46,690 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.1 percent of original size [2021-06-12 20:14:46,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:46,694 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:46,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:46,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:14:46,729 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:59 [2021-06-12 20:14:47,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:47,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:47,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:14:47,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:47,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:47,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:47,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:14:47,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:47,019 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:14:47,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:47,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:47,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:14:47,023 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:47,067 INFO L628 ElimStorePlain]: treesize reduction 29, result has 59.7 percent of original size [2021-06-12 20:14:47,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:14:47,069 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-06-12 20:14:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:14:47,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041627821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:47,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:47,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-06-12 20:14:47,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301348067] [2021-06-12 20:14:47,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:14:47,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:47,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:14:47,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:14:47,138 INFO L87 Difference]: Start difference. First operand 588 states and 1826 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:47,635 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-06-12 20:14:48,831 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-12 20:14:49,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:49,594 INFO L93 Difference]: Finished difference Result 1145 states and 3412 transitions. [2021-06-12 20:14:49,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:14:49,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:14:49,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:49,597 INFO L225 Difference]: With dead ends: 1145 [2021-06-12 20:14:49,597 INFO L226 Difference]: Without dead ends: 965 [2021-06-12 20:14:49,597 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2225.2ms TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:14:49,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-06-12 20:14:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 639. [2021-06-12 20:14:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.115987460815047) internal successors, (1988), 638 states have internal predecessors, (1988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:49,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1988 transitions. [2021-06-12 20:14:49,606 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1988 transitions. Word has length 23 [2021-06-12 20:14:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:49,606 INFO L482 AbstractCegarLoop]: Abstraction has 639 states and 1988 transitions. [2021-06-12 20:14:49,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:49,606 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1988 transitions. [2021-06-12 20:14:49,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:14:49,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:49,607 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:49,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2930,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:49,832 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:49,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:49,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1859126854, now seen corresponding path program 214 times [2021-06-12 20:14:49,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:49,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131963597] [2021-06-12 20:14:49,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:14:50,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:50,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131963597] [2021-06-12 20:14:50,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131963597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:50,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236241] [2021-06-12 20:14:50,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:50,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:14:50,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:50,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:14:50,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:50,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:50,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:50,550 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-06-12 20:14:50,550 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-12 20:14:50,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:50,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:50,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:50,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:50,652 INFO L628 ElimStorePlain]: treesize reduction 52, result has 64.9 percent of original size [2021-06-12 20:14:50,652 INFO L518 ElimStorePlain]: Eliminatee v_prenex_78 vanished before elimination [2021-06-12 20:14:50,652 INFO L518 ElimStorePlain]: Eliminatee ends_with_2 vanished before elimination [2021-06-12 20:14:50,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:50,656 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:50,724 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.1 percent of original size [2021-06-12 20:14:50,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-12 20:14:50,727 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:160, output treesize:70 [2021-06-12 20:14:51,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:51,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:51,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:14:51,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:51,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:51,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:51,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:14:51,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:51,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:51,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:51,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:14:51,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:51,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:51,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:14:51,599 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:51,739 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-06-12 20:14:51,739 INFO L628 ElimStorePlain]: treesize reduction 199, result has 37.8 percent of original size [2021-06-12 20:14:51,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:51,743 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:51,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:51,747 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:51,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:51,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:51,838 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:51,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:51,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:14:51,890 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:394, output treesize:68 [2021-06-12 20:14:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:14:52,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:52,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:52,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 20:14:52,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230383593] [2021-06-12 20:14:52,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:14:52,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:52,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:14:52,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:14:52,043 INFO L87 Difference]: Start difference. First operand 639 states and 1988 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:53,583 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-06-12 20:14:53,736 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-12 20:14:54,101 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-06-12 20:14:54,260 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-06-12 20:14:55,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:55,756 INFO L93 Difference]: Finished difference Result 1668 states and 4813 transitions. [2021-06-12 20:14:55,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:14:55,756 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:14:55,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:55,758 INFO L225 Difference]: With dead ends: 1668 [2021-06-12 20:14:55,758 INFO L226 Difference]: Without dead ends: 1480 [2021-06-12 20:14:55,758 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 3387.5ms TimeCoverageRelationStatistics Valid=354, Invalid=2402, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:14:55,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-06-12 20:14:55,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 678. [2021-06-12 20:14:55,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 3.193500738552437) internal successors, (2162), 677 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:55,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 2162 transitions. [2021-06-12 20:14:55,767 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 2162 transitions. Word has length 23 [2021-06-12 20:14:55,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:55,767 INFO L482 AbstractCegarLoop]: Abstraction has 678 states and 2162 transitions. [2021-06-12 20:14:55,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:55,767 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 2162 transitions. [2021-06-12 20:14:55,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:14:55,768 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:55,768 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:55,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2964 [2021-06-12 20:14:55,969 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:55,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:55,969 INFO L82 PathProgramCache]: Analyzing trace with hash 630316840, now seen corresponding path program 215 times [2021-06-12 20:14:55,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:55,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987414838] [2021-06-12 20:14:55,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:14:56,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:56,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987414838] [2021-06-12 20:14:56,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987414838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:56,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390306392] [2021-06-12 20:14:56,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:56,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:14:56,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:56,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:14:56,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:56,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:56,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:56,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:56,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:56,344 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:14:56,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:56,411 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.7 percent of original size [2021-06-12 20:14:56,412 INFO L518 ElimStorePlain]: Eliminatee v_prenex_86 vanished before elimination [2021-06-12 20:14:56,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:56,415 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:56,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:56,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:14:56,445 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:59 [2021-06-12 20:14:56,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:56,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:56,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:14:56,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:56,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:56,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:56,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:14:56,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:56,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:56,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:14:56,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:56,711 INFO L628 ElimStorePlain]: treesize reduction 86, result has 40.7 percent of original size [2021-06-12 20:14:56,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:56,714 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:56,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:56,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:14:56,737 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:185, output treesize:37 [2021-06-12 20:14:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:14:56,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390306392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:56,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:56,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 20:14:56,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072855170] [2021-06-12 20:14:56,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:14:56,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:56,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:14:56,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:14:56,844 INFO L87 Difference]: Start difference. First operand 678 states and 2162 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:58,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:14:58,690 INFO L93 Difference]: Finished difference Result 1398 states and 4082 transitions. [2021-06-12 20:14:58,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:14:58,690 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:14:58,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:14:58,692 INFO L225 Difference]: With dead ends: 1398 [2021-06-12 20:14:58,692 INFO L226 Difference]: Without dead ends: 1240 [2021-06-12 20:14:58,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1558.5ms TimeCoverageRelationStatistics Valid=248, Invalid=1474, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:14:58,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-06-12 20:14:58,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 675. [2021-06-12 20:14:58,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 3.1839762611275964) internal successors, (2146), 674 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:58,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 2146 transitions. [2021-06-12 20:14:58,701 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 2146 transitions. Word has length 23 [2021-06-12 20:14:58,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:14:58,701 INFO L482 AbstractCegarLoop]: Abstraction has 675 states and 2146 transitions. [2021-06-12 20:14:58,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:14:58,701 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 2146 transitions. [2021-06-12 20:14:58,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:14:58,702 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:14:58,702 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:14:58,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3182 [2021-06-12 20:14:58,902 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:14:58,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:14:58,902 INFO L82 PathProgramCache]: Analyzing trace with hash 620245514, now seen corresponding path program 216 times [2021-06-12 20:14:58,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:14:58,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543633399] [2021-06-12 20:14:58,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:14:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:14:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:14:59,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:14:59,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543633399] [2021-06-12 20:14:59,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543633399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:59,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43251393] [2021-06-12 20:14:59,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:14:59,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:14:59,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:14:59,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:14:59,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:14:59,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:59,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:59,294 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-12 20:14:59,294 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.9 percent of original size [2021-06-12 20:14:59,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:14:59,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:59,360 INFO L628 ElimStorePlain]: treesize reduction 50, result has 58.3 percent of original size [2021-06-12 20:14:59,360 INFO L518 ElimStorePlain]: Eliminatee v_prenex_90 vanished before elimination [2021-06-12 20:14:59,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:14:59,363 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:59,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:14:59,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:14:59,396 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:132, output treesize:59 [2021-06-12 20:14:59,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:59,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:59,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:14:59,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:59,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:59,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:59,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:14:59,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:59,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:14:59,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:14:59,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:14:59,639 INFO L628 ElimStorePlain]: treesize reduction 20, result has 58.3 percent of original size [2021-06-12 20:14:59,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:14:59,640 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:82, output treesize:20 [2021-06-12 20:14:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:14:59,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43251393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:14:59,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:14:59,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 20:14:59,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144562747] [2021-06-12 20:14:59,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:14:59,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:14:59,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:14:59,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:14:59,694 INFO L87 Difference]: Start difference. First operand 675 states and 2146 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:00,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:15:00,399 INFO L93 Difference]: Finished difference Result 931 states and 2785 transitions. [2021-06-12 20:15:00,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:15:00,400 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:15:00,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:15:00,401 INFO L225 Difference]: With dead ends: 931 [2021-06-12 20:15:00,401 INFO L226 Difference]: Without dead ends: 811 [2021-06-12 20:15:00,401 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 589.2ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:15:00,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-06-12 20:15:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 677. [2021-06-12 20:15:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 3.1819526627218937) internal successors, (2151), 676 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 2151 transitions. [2021-06-12 20:15:00,408 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 2151 transitions. Word has length 23 [2021-06-12 20:15:00,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:15:00,408 INFO L482 AbstractCegarLoop]: Abstraction has 677 states and 2151 transitions. [2021-06-12 20:15:00,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:00,408 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 2151 transitions. [2021-06-12 20:15:00,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:15:00,409 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:15:00,409 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:15:00,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3219,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:00,609 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:15:00,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:15:00,610 INFO L82 PathProgramCache]: Analyzing trace with hash -161287938, now seen corresponding path program 217 times [2021-06-12 20:15:00,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:15:00,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203294088] [2021-06-12 20:15:00,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:15:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:15:00,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:15:00,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203294088] [2021-06-12 20:15:00,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203294088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:00,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456050216] [2021-06-12 20:15:00,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:00,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 20:15:00,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:15:00,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:00,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:00,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:00,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:00,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:00,909 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:00,971 INFO L628 ElimStorePlain]: treesize reduction 55, result has 56.0 percent of original size [2021-06-12 20:15:00,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:00,974 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:01,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:15:01,002 INFO L518 ElimStorePlain]: Eliminatee v_prenex_94 vanished before elimination [2021-06-12 20:15:01,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:15:01,004 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:59 [2021-06-12 20:15:01,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:01,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:01,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:15:01,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:01,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:01,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:01,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:15:01,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:01,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:01,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:01,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:15:01,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:01,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:01,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:15:01,266 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:01,308 INFO L628 ElimStorePlain]: treesize reduction 49, result has 46.7 percent of original size [2021-06-12 20:15:01,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:15:01,309 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:35 [2021-06-12 20:15:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:15:01,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456050216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:01,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:15:01,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-12 20:15:01,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379010317] [2021-06-12 20:15:01,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:15:01,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:15:01,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:15:01,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:15:01,372 INFO L87 Difference]: Start difference. First operand 677 states and 2151 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:03,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:15:03,510 INFO L93 Difference]: Finished difference Result 1484 states and 4400 transitions. [2021-06-12 20:15:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:15:03,510 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:15:03,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:15:03,512 INFO L225 Difference]: With dead ends: 1484 [2021-06-12 20:15:03,512 INFO L226 Difference]: Without dead ends: 1238 [2021-06-12 20:15:03,512 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1820.0ms TimeCoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:15:03,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-12 20:15:03,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 688. [2021-06-12 20:15:03,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 3.1935953420669576) internal successors, (2194), 687 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:03,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 2194 transitions. [2021-06-12 20:15:03,521 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 2194 transitions. Word has length 23 [2021-06-12 20:15:03,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:15:03,521 INFO L482 AbstractCegarLoop]: Abstraction has 688 states and 2194 transitions. [2021-06-12 20:15:03,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:03,521 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 2194 transitions. [2021-06-12 20:15:03,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:15:03,522 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:15:03,522 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:15:03,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3248 [2021-06-12 20:15:03,737 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:15:03,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:15:03,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1644882548, now seen corresponding path program 218 times [2021-06-12 20:15:03,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:15:03,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713346891] [2021-06-12 20:15:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:15:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:15:03,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:15:03,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713346891] [2021-06-12 20:15:03,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713346891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:03,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046843821] [2021-06-12 20:15:03,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:03,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:15:03,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:15:03,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:15:03,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:15:04,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:04,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:04,173 INFO L628 ElimStorePlain]: treesize reduction 29, result has 77.5 percent of original size [2021-06-12 20:15:04,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:04,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:04,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:15:04,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:04,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:04,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:15:04,268 INFO L518 ElimStorePlain]: Eliminatee v_prenex_98 vanished before elimination [2021-06-12 20:15:04,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:04,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:04,327 INFO L628 ElimStorePlain]: treesize reduction 22, result has 75.3 percent of original size [2021-06-12 20:15:04,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:15:04,329 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:132, output treesize:59 [2021-06-12 20:15:04,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:04,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:04,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:15:04,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:04,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:04,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:04,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:15:04,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:04,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:04,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:04,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:15:04,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:04,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:04,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:15:04,596 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:04,639 INFO L628 ElimStorePlain]: treesize reduction 50, result has 46.2 percent of original size [2021-06-12 20:15:04,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:15:04,641 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:155, output treesize:35 [2021-06-12 20:15:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:15:04,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046843821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:04,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:15:04,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:15:04,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174632948] [2021-06-12 20:15:04,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:15:04,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:15:04,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:15:04,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:15:04,709 INFO L87 Difference]: Start difference. First operand 688 states and 2194 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:06,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:15:06,161 INFO L93 Difference]: Finished difference Result 1183 states and 3509 transitions. [2021-06-12 20:15:06,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:15:06,161 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:15:06,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:15:06,163 INFO L225 Difference]: With dead ends: 1183 [2021-06-12 20:15:06,163 INFO L226 Difference]: Without dead ends: 1017 [2021-06-12 20:15:06,163 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1116.0ms TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:15:06,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-06-12 20:15:06,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 669. [2021-06-12 20:15:06,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.179640718562874) internal successors, (2124), 668 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:06,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2124 transitions. [2021-06-12 20:15:06,172 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2124 transitions. Word has length 23 [2021-06-12 20:15:06,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:15:06,172 INFO L482 AbstractCegarLoop]: Abstraction has 669 states and 2124 transitions. [2021-06-12 20:15:06,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:06,172 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2124 transitions. [2021-06-12 20:15:06,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:15:06,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:15:06,173 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:15:06,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3305,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:06,375 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:15:06,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:15:06,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2094348922, now seen corresponding path program 219 times [2021-06-12 20:15:06,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:15:06,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499708315] [2021-06-12 20:15:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:15:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:06,637 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-12 20:15:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:15:06,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:15:06,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499708315] [2021-06-12 20:15:06,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499708315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:06,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74272612] [2021-06-12 20:15:06,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:06,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:15:06,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:15:06,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:15:06,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:15:07,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:07,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:07,182 INFO L628 ElimStorePlain]: treesize reduction 72, result has 54.7 percent of original size [2021-06-12 20:15:07,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:07,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:07,237 INFO L628 ElimStorePlain]: treesize reduction 31, result has 62.7 percent of original size [2021-06-12 20:15:07,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:15:07,239 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:162, output treesize:42 [2021-06-12 20:15:07,657 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_102, ends_with_2, v_prenex_104, v_prenex_103, v_prenex_105], 1=[ends_with_6]} [2021-06-12 20:15:07,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:07,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:07,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:15:07,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:07,839 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-06-12 20:15:07,840 INFO L628 ElimStorePlain]: treesize reduction 126, result has 51.4 percent of original size [2021-06-12 20:15:07,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:07,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:07,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:07,852 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:07,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:15:07,923 INFO L518 ElimStorePlain]: Eliminatee v_prenex_104 vanished before elimination [2021-06-12 20:15:07,923 INFO L518 ElimStorePlain]: Eliminatee v_prenex_103 vanished before elimination [2021-06-12 20:15:07,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:07,930 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:07,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:07,934 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:08,070 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-06-12 20:15:08,071 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-12 20:15:08,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:08,076 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:08,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:08,080 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:08,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:08,089 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:08,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:08,094 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:08,180 INFO L628 ElimStorePlain]: treesize reduction 22, result has 78.6 percent of original size [2021-06-12 20:15:08,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:15:08,189 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 8 variables, input treesize:298, output treesize:35 [2021-06-12 20:15:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:15:08,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74272612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:08,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:15:08,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-12 20:15:08,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81654338] [2021-06-12 20:15:08,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:15:08,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:15:08,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:15:08,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:15:08,277 INFO L87 Difference]: Start difference. First operand 669 states and 2124 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:11,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:15:11,386 INFO L93 Difference]: Finished difference Result 1532 states and 4667 transitions. [2021-06-12 20:15:11,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 20:15:11,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:15:11,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:15:11,388 INFO L225 Difference]: With dead ends: 1532 [2021-06-12 20:15:11,388 INFO L226 Difference]: Without dead ends: 1355 [2021-06-12 20:15:11,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 3071.0ms TimeCoverageRelationStatistics Valid=534, Invalid=3126, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 20:15:11,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-06-12 20:15:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 758. [2021-06-12 20:15:11,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.248348745046235) internal successors, (2459), 757 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:11,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2459 transitions. [2021-06-12 20:15:11,400 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2459 transitions. Word has length 23 [2021-06-12 20:15:11,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:15:11,400 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2459 transitions. [2021-06-12 20:15:11,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:11,400 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2459 transitions. [2021-06-12 20:15:11,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:15:11,401 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:15:11,401 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:15:11,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3363,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:11,616 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:15:11,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:15:11,616 INFO L82 PathProgramCache]: Analyzing trace with hash -2146347564, now seen corresponding path program 220 times [2021-06-12 20:15:11,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:15:11,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551818445] [2021-06-12 20:15:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:15:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:15:11,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:15:11,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551818445] [2021-06-12 20:15:11,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551818445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:11,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37616983] [2021-06-12 20:15:11,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:11,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:15:11,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:15:11,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:15:11,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:15:11,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:11,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:11,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:11,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:11,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:11,991 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:11,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:11,995 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:11,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:11,999 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:12,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:12,003 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:12,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:15:12,006 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:12,011 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:15:12,011 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:12,112 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-06-12 20:15:12,112 INFO L628 ElimStorePlain]: treesize reduction 51, result has 66.0 percent of original size [2021-06-12 20:15:12,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:12,117 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:12,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:15:12,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:12,160 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:12,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:12,164 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:12,232 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.6 percent of original size [2021-06-12 20:15:12,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:12,235 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:12,283 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.4 percent of original size [2021-06-12 20:15:12,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:15:12,285 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:231, output treesize:45 [2021-06-12 20:15:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:15:12,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37616983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:12,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:15:12,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:15:12,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249595929] [2021-06-12 20:15:12,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:15:12,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:15:12,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:15:12,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:15:12,391 INFO L87 Difference]: Start difference. First operand 758 states and 2459 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:12,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:15:12,869 INFO L93 Difference]: Finished difference Result 1012 states and 3166 transitions. [2021-06-12 20:15:12,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:15:12,869 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:15:12,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:15:12,871 INFO L225 Difference]: With dead ends: 1012 [2021-06-12 20:15:12,871 INFO L226 Difference]: Without dead ends: 967 [2021-06-12 20:15:12,871 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 469.9ms TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:15:12,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-06-12 20:15:12,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 716. [2021-06-12 20:15:12,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 3.1706293706293707) internal successors, (2267), 715 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:12,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2267 transitions. [2021-06-12 20:15:12,878 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2267 transitions. Word has length 23 [2021-06-12 20:15:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:15:12,879 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 2267 transitions. [2021-06-12 20:15:12,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2267 transitions. [2021-06-12 20:15:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:15:12,879 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:15:12,879 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:15:13,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3414 [2021-06-12 20:15:13,081 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:15:13,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:15:13,081 INFO L82 PathProgramCache]: Analyzing trace with hash -554888474, now seen corresponding path program 221 times [2021-06-12 20:15:13,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:15:13,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62136288] [2021-06-12 20:15:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:15:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:15:13,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:15:13,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62136288] [2021-06-12 20:15:13,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62136288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:13,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684776455] [2021-06-12 20:15:13,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:13,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:15:13,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:15:13,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:15:13,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:15:13,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:13,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:13,500 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.2 percent of original size [2021-06-12 20:15:13,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:13,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:13,577 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-12 20:15:13,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:13,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:13,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:15:13,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:13,620 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:13,674 INFO L628 ElimStorePlain]: treesize reduction 21, result has 75.6 percent of original size [2021-06-12 20:15:13,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:15:13,676 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:107, output treesize:60 [2021-06-12 20:15:14,111 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_112, ends_with_10], 3=[ends_with_2]} [2021-06-12 20:15:14,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:14,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:14,122 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:15:14,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:14,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:15:14,129 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:14,461 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-12 20:15:14,462 INFO L628 ElimStorePlain]: treesize reduction 220, result has 53.8 percent of original size [2021-06-12 20:15:14,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:14,466 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:14,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:14,471 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:14,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:14,475 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:14,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:14,480 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:14,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:14,485 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:14,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:14,489 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:14,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:14,493 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:14,684 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-06-12 20:15:14,684 INFO L628 ElimStorePlain]: treesize reduction 28, result has 87.9 percent of original size [2021-06-12 20:15:14,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:14,689 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:14,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:14,693 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:14,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:14,697 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:14,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:14,709 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:14,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:14,713 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:14,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:14,717 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:14,852 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-12 20:15:14,853 INFO L628 ElimStorePlain]: treesize reduction 26, result has 85.6 percent of original size [2021-06-12 20:15:14,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 20:15:14,857 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 6 variables, input treesize:554, output treesize:93 [2021-06-12 20:15:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:15:15,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684776455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:15,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:15:15,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:15:15,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729025176] [2021-06-12 20:15:15,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:15:15,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:15:15,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:15:15,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:15:15,029 INFO L87 Difference]: Start difference. First operand 716 states and 2267 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:16,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:15:16,096 INFO L93 Difference]: Finished difference Result 1121 states and 3478 transitions. [2021-06-12 20:15:16,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:15:16,096 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:15:16,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:15:16,098 INFO L225 Difference]: With dead ends: 1121 [2021-06-12 20:15:16,098 INFO L226 Difference]: Without dead ends: 1031 [2021-06-12 20:15:16,098 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1097.0ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:15:16,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-06-12 20:15:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 726. [2021-06-12 20:15:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.169655172413793) internal successors, (2298), 725 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2298 transitions. [2021-06-12 20:15:16,108 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2298 transitions. Word has length 23 [2021-06-12 20:15:16,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:15:16,108 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2298 transitions. [2021-06-12 20:15:16,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2298 transitions. [2021-06-12 20:15:16,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:15:16,109 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:15:16,109 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:15:16,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3448,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:16,329 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:15:16,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:15:16,329 INFO L82 PathProgramCache]: Analyzing trace with hash 620602170, now seen corresponding path program 222 times [2021-06-12 20:15:16,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:15:16,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316595283] [2021-06-12 20:15:16,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:15:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:15:16,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:15:16,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316595283] [2021-06-12 20:15:16,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316595283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:16,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281990007] [2021-06-12 20:15:16,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:16,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:15:16,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:15:16,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:15:16,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:15:16,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:16,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:16,718 INFO L628 ElimStorePlain]: treesize reduction 28, result has 76.3 percent of original size [2021-06-12 20:15:16,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:16,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:16,770 INFO L628 ElimStorePlain]: treesize reduction 22, result has 74.4 percent of original size [2021-06-12 20:15:16,771 INFO L518 ElimStorePlain]: Eliminatee v_prenex_114 vanished before elimination [2021-06-12 20:15:16,771 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-12 20:15:16,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:16,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:16,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:15:16,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:15:16,798 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:122, output treesize:61 [2021-06-12 20:15:16,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:16,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:16,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:16,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:16,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:16,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:16,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:16,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:16,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:15:16,951 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:16,954 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:15:16,955 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:16,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:16,959 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:16,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:16,963 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:17,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:15:17,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:17,040 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:17,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:15:17,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:17,112 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:17,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:17,115 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:17,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:17,119 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:17,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:17,123 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:17,250 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-06-12 20:15:17,250 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.5 percent of original size [2021-06-12 20:15:17,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:17,254 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:17,347 INFO L628 ElimStorePlain]: treesize reduction 28, result has 81.5 percent of original size [2021-06-12 20:15:17,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:15:17,350 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 5 variables, input treesize:269, output treesize:98 [2021-06-12 20:15:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:15:17,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281990007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:17,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:15:17,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:15:17,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114799474] [2021-06-12 20:15:17,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:15:17,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:15:17,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:15:17,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:15:17,526 INFO L87 Difference]: Start difference. First operand 726 states and 2298 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:15:18,494 INFO L93 Difference]: Finished difference Result 1248 states and 3824 transitions. [2021-06-12 20:15:18,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:15:18,494 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:15:18,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:15:18,496 INFO L225 Difference]: With dead ends: 1248 [2021-06-12 20:15:18,496 INFO L226 Difference]: Without dead ends: 1158 [2021-06-12 20:15:18,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 945.0ms TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:15:18,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-06-12 20:15:18,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 736. [2021-06-12 20:15:18,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.182312925170068) internal successors, (2339), 735 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:18,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2339 transitions. [2021-06-12 20:15:18,508 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2339 transitions. Word has length 23 [2021-06-12 20:15:18,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:15:18,509 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2339 transitions. [2021-06-12 20:15:18,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:18,509 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2339 transitions. [2021-06-12 20:15:18,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:15:18,510 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:15:18,510 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:15:18,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3545 [2021-06-12 20:15:18,734 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:15:18,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:15:18,735 INFO L82 PathProgramCache]: Analyzing trace with hash -2060798392, now seen corresponding path program 223 times [2021-06-12 20:15:18,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:15:18,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985385303] [2021-06-12 20:15:18,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:15:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:15:19,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:15:19,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985385303] [2021-06-12 20:15:19,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985385303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:19,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986655872] [2021-06-12 20:15:19,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:19,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:15:19,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:15:20,398 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_119], 1=[ends_with_2]} [2021-06-12 20:15:20,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:20,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:20,405 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:15:20,406 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:20,497 INFO L628 ElimStorePlain]: treesize reduction 180, result has 28.3 percent of original size [2021-06-12 20:15:20,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:20,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:20,539 INFO L628 ElimStorePlain]: treesize reduction 24, result has 64.2 percent of original size [2021-06-12 20:15:20,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:20,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:20,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:20,545 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:20,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:15:20,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:15:20,560 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:278, output treesize:20 [2021-06-12 20:15:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:15:20,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986655872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:20,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:15:20,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-12 20:15:20,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015186868] [2021-06-12 20:15:20,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:15:20,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:15:20,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:15:20,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:15:20,665 INFO L87 Difference]: Start difference. First operand 736 states and 2339 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:22,164 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 19 [2021-06-12 20:15:23,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:15:23,780 INFO L93 Difference]: Finished difference Result 1116 states and 3361 transitions. [2021-06-12 20:15:23,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:15:23,780 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:15:23,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:15:23,782 INFO L225 Difference]: With dead ends: 1116 [2021-06-12 20:15:23,782 INFO L226 Difference]: Without dead ends: 1050 [2021-06-12 20:15:23,782 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 2652.8ms TimeCoverageRelationStatistics Valid=254, Invalid=2196, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:15:23,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-12 20:15:23,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 710. [2021-06-12 20:15:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 3.170662905500705) internal successors, (2248), 709 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2248 transitions. [2021-06-12 20:15:23,792 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2248 transitions. Word has length 23 [2021-06-12 20:15:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:15:23,792 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2248 transitions. [2021-06-12 20:15:23,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:23,792 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2248 transitions. [2021-06-12 20:15:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:15:23,793 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:15:23,793 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:15:24,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3582 [2021-06-12 20:15:24,013 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:15:24,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:15:24,013 INFO L82 PathProgramCache]: Analyzing trace with hash -973949894, now seen corresponding path program 224 times [2021-06-12 20:15:24,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:15:24,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789103389] [2021-06-12 20:15:24,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:15:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:15:24,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:15:24,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789103389] [2021-06-12 20:15:24,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789103389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:24,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111227513] [2021-06-12 20:15:24,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:24,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:15:24,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:15:24,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:15:24,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:15:24,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:24,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:24,451 INFO L628 ElimStorePlain]: treesize reduction 30, result has 68.8 percent of original size [2021-06-12 20:15:24,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:24,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:24,493 INFO L628 ElimStorePlain]: treesize reduction 24, result has 61.3 percent of original size [2021-06-12 20:15:24,493 INFO L518 ElimStorePlain]: Eliminatee v_prenex_120 vanished before elimination [2021-06-12 20:15:24,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:15:24,495 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:99, output treesize:33 [2021-06-12 20:15:24,732 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_122, v_prenex_124, v_prenex_123, ends_with_10], 1=[ends_with_2]} [2021-06-12 20:15:24,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:24,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:24,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:24,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:24,945 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-06-12 20:15:24,945 INFO L628 ElimStorePlain]: treesize reduction 79, result has 69.0 percent of original size [2021-06-12 20:15:24,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:24,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:25,141 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-12 20:15:25,141 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.7 percent of original size [2021-06-12 20:15:25,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:25,146 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:25,308 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-12 20:15:25,309 INFO L628 ElimStorePlain]: treesize reduction 25, result has 84.8 percent of original size [2021-06-12 20:15:25,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:25,314 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:25,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:25,318 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:25,465 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-12 20:15:25,466 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-12 20:15:25,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:25,471 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:25,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:25,485 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:25,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:25,500 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:25,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:25,506 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:25,623 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-06-12 20:15:25,624 INFO L628 ElimStorePlain]: treesize reduction 25, result has 78.4 percent of original size [2021-06-12 20:15:25,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:15:25,626 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:261, output treesize:57 [2021-06-12 20:15:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:15:25,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111227513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:25,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:15:25,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:15:25,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505288687] [2021-06-12 20:15:25,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:15:25,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:15:25,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:15:25,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:15:25,777 INFO L87 Difference]: Start difference. First operand 710 states and 2248 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:26,417 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-12 20:15:27,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:15:27,210 INFO L93 Difference]: Finished difference Result 1008 states and 3166 transitions. [2021-06-12 20:15:27,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:15:27,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:15:27,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:15:27,213 INFO L225 Difference]: With dead ends: 1008 [2021-06-12 20:15:27,213 INFO L226 Difference]: Without dead ends: 963 [2021-06-12 20:15:27,213 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1385.1ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:15:27,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-06-12 20:15:27,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 729. [2021-06-12 20:15:27,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.168956043956044) internal successors, (2307), 728 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:27,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2307 transitions. [2021-06-12 20:15:27,221 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2307 transitions. Word has length 23 [2021-06-12 20:15:27,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:15:27,222 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2307 transitions. [2021-06-12 20:15:27,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:27,222 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2307 transitions. [2021-06-12 20:15:27,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:15:27,222 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:15:27,222 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:15:27,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-06-12 20:15:27,423 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:15:27,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:15:27,423 INFO L82 PathProgramCache]: Analyzing trace with hash -25680630, now seen corresponding path program 225 times [2021-06-12 20:15:27,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:15:27,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819931788] [2021-06-12 20:15:27,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:15:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:15:27,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:15:27,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819931788] [2021-06-12 20:15:27,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819931788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:27,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132754960] [2021-06-12 20:15:27,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:27,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:15:27,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:15:27,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:15:27,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:15:28,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:28,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:28,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:28,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:28,504 INFO L628 ElimStorePlain]: treesize reduction 26, result has 76.6 percent of original size [2021-06-12 20:15:28,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:28,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:28,570 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.5 percent of original size [2021-06-12 20:15:28,570 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-12 20:15:28,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:28,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:28,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:15:28,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:15:28,601 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:117, output treesize:58 [2021-06-12 20:15:28,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:28,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:28,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:28,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:28,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:28,796 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:28,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:28,801 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:28,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:28,806 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:28,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:28,811 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:28,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:28,816 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:28,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:28,821 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:28,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:28,826 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:28,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:15:28,831 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:29,006 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-06-12 20:15:29,007 INFO L628 ElimStorePlain]: treesize reduction 99, result has 64.0 percent of original size [2021-06-12 20:15:29,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:29,012 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:29,141 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-06-12 20:15:29,141 INFO L628 ElimStorePlain]: treesize reduction 33, result has 80.9 percent of original size [2021-06-12 20:15:29,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:29,145 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:29,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:29,149 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:29,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:29,152 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:29,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:29,156 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:29,272 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-06-12 20:15:29,273 INFO L628 ElimStorePlain]: treesize reduction 3, result has 97.6 percent of original size [2021-06-12 20:15:29,273 INFO L518 ElimStorePlain]: Eliminatee v_prenex_129 vanished before elimination [2021-06-12 20:15:29,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:15:29,275 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 5 variables, input treesize:341, output treesize:98 [2021-06-12 20:15:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:15:29,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132754960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:29,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:15:29,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:15:29,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842874435] [2021-06-12 20:15:29,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:15:29,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:15:29,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:15:29,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:15:29,465 INFO L87 Difference]: Start difference. First operand 729 states and 2307 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:30,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:15:30,409 INFO L93 Difference]: Finished difference Result 1261 states and 3863 transitions. [2021-06-12 20:15:30,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:15:30,409 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:15:30,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:15:30,411 INFO L225 Difference]: With dead ends: 1261 [2021-06-12 20:15:30,411 INFO L226 Difference]: Without dead ends: 1171 [2021-06-12 20:15:30,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1315.5ms TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:15:30,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-06-12 20:15:30,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 739. [2021-06-12 20:15:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.1815718157181574) internal successors, (2348), 738 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:30,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2348 transitions. [2021-06-12 20:15:30,420 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2348 transitions. Word has length 23 [2021-06-12 20:15:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:15:30,420 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2348 transitions. [2021-06-12 20:15:30,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:30,420 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2348 transitions. [2021-06-12 20:15:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:15:30,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:15:30,421 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:15:30,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3713,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:30,622 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:15:30,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:15:30,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1587886104, now seen corresponding path program 226 times [2021-06-12 20:15:30,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:15:30,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377040207] [2021-06-12 20:15:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:15:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:15:30,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:15:30,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377040207] [2021-06-12 20:15:30,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377040207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:30,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600308360] [2021-06-12 20:15:30,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:31,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:15:31,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:15:31,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:15:31,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:15:31,386 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_2, v_prenex_131, v_prenex_130], 1=[ends_with_6]} [2021-06-12 20:15:31,390 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:15:31,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:31,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:31,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:31,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:31,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:31,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:31,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:31,407 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:15:31,407 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:31,410 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:15:31,411 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:31,526 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-06-12 20:15:31,526 INFO L628 ElimStorePlain]: treesize reduction 117, result has 38.4 percent of original size [2021-06-12 20:15:31,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:31,547 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:31,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:15:31,585 INFO L518 ElimStorePlain]: Eliminatee v_prenex_130 vanished before elimination [2021-06-12 20:15:31,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:31,589 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:31,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:31,593 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:31,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:31,597 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:31,655 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.3 percent of original size [2021-06-12 20:15:31,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:15:31,657 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:293, output treesize:32 [2021-06-12 20:15:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:15:31,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600308360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:31,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:15:31,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 20:15:31,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778620731] [2021-06-12 20:15:31,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:15:31,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:15:31,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:15:31,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:15:31,742 INFO L87 Difference]: Start difference. First operand 739 states and 2348 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:32,425 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2021-06-12 20:15:32,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:15:32,990 INFO L93 Difference]: Finished difference Result 1121 states and 3462 transitions. [2021-06-12 20:15:32,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:15:32,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:15:32,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:15:32,992 INFO L225 Difference]: With dead ends: 1121 [2021-06-12 20:15:32,992 INFO L226 Difference]: Without dead ends: 1067 [2021-06-12 20:15:32,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1376.1ms TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:15:32,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-12 20:15:33,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 751. [2021-06-12 20:15:33,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.1973333333333334) internal successors, (2398), 750 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:33,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2398 transitions. [2021-06-12 20:15:33,003 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2398 transitions. Word has length 23 [2021-06-12 20:15:33,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:15:33,003 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2398 transitions. [2021-06-12 20:15:33,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:33,004 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2398 transitions. [2021-06-12 20:15:33,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:15:33,005 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:15:33,005 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:15:33,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3750,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:33,221 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:15:33,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:15:33,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1571783644, now seen corresponding path program 227 times [2021-06-12 20:15:33,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:15:33,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182354397] [2021-06-12 20:15:33,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:15:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:15:33,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:15:33,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182354397] [2021-06-12 20:15:33,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182354397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:33,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652583970] [2021-06-12 20:15:33,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:33,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:15:33,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:15:33,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:15:33,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:15:34,019 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_133, v_prenex_132, ends_with_6], 1=[ends_with_2]} [2021-06-12 20:15:34,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:34,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:34,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:34,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:34,132 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-06-12 20:15:34,133 INFO L628 ElimStorePlain]: treesize reduction 110, result has 47.4 percent of original size [2021-06-12 20:15:34,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:34,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:34,202 INFO L628 ElimStorePlain]: treesize reduction 24, result has 74.7 percent of original size [2021-06-12 20:15:34,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:34,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:34,249 INFO L628 ElimStorePlain]: treesize reduction 25, result has 63.2 percent of original size [2021-06-12 20:15:34,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:34,254 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:34,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:34,258 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:34,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:15:34,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:15:34,279 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:217, output treesize:20 [2021-06-12 20:15:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:15:34,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652583970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:34,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:15:34,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-12 20:15:34,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545369621] [2021-06-12 20:15:34,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:15:34,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:15:34,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:15:34,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:15:34,357 INFO L87 Difference]: Start difference. First operand 751 states and 2398 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:37,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:15:37,454 INFO L93 Difference]: Finished difference Result 1322 states and 4005 transitions. [2021-06-12 20:15:37,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 20:15:37,454 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:15:37,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:15:37,456 INFO L225 Difference]: With dead ends: 1322 [2021-06-12 20:15:37,456 INFO L226 Difference]: Without dead ends: 1229 [2021-06-12 20:15:37,456 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 2642.0ms TimeCoverageRelationStatistics Valid=432, Invalid=3108, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:15:37,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-06-12 20:15:37,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 750. [2021-06-12 20:15:37,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.184245660881175) internal successors, (2385), 749 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:37,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2385 transitions. [2021-06-12 20:15:37,464 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2385 transitions. Word has length 23 [2021-06-12 20:15:37,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:15:37,464 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2385 transitions. [2021-06-12 20:15:37,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:37,464 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2385 transitions. [2021-06-12 20:15:37,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:15:37,465 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:15:37,465 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:15:37,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3798,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:37,668 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:15:37,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:15:37,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1840314058, now seen corresponding path program 228 times [2021-06-12 20:15:37,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:15:37,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593907282] [2021-06-12 20:15:37,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:15:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:15:37,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:15:37,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593907282] [2021-06-12 20:15:37,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593907282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:37,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532937097] [2021-06-12 20:15:37,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:38,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:15:38,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:15:38,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:15:38,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:15:38,513 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_134, ends_with_6], 1=[ends_with_2]} [2021-06-12 20:15:38,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:15:38,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:38,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:38,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:38,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:15:38,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:38,668 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-06-12 20:15:38,668 INFO L628 ElimStorePlain]: treesize reduction 187, result has 43.7 percent of original size [2021-06-12 20:15:38,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:38,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:38,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:38,676 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:38,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:38,679 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:38,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:38,682 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:38,788 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-12 20:15:38,788 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-12 20:15:38,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:38,794 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:38,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:38,798 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:38,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:38,801 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:38,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:38,804 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:38,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:38,808 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:38,896 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.1 percent of original size [2021-06-12 20:15:38,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:15:38,897 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:395, output treesize:65 [2021-06-12 20:15:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:15:39,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532937097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:39,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:15:39,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-12 20:15:39,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344254946] [2021-06-12 20:15:39,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:15:39,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:15:39,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:15:39,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:15:39,025 INFO L87 Difference]: Start difference. First operand 750 states and 2385 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:41,048 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-06-12 20:15:42,356 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2021-06-12 20:15:43,070 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-12 20:15:43,719 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-06-12 20:15:43,876 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-06-12 20:15:44,102 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-06-12 20:15:44,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:15:44,553 INFO L93 Difference]: Finished difference Result 1854 states and 5388 transitions. [2021-06-12 20:15:44,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 20:15:44,554 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:15:44,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:15:44,556 INFO L225 Difference]: With dead ends: 1854 [2021-06-12 20:15:44,556 INFO L226 Difference]: Without dead ends: 1620 [2021-06-12 20:15:44,556 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 4659.6ms TimeCoverageRelationStatistics Valid=659, Invalid=5041, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 20:15:44,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-06-12 20:15:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 812. [2021-06-12 20:15:44,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.256473489519112) internal successors, (2641), 811 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:44,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2641 transitions. [2021-06-12 20:15:44,568 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2641 transitions. Word has length 23 [2021-06-12 20:15:44,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:15:44,568 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2641 transitions. [2021-06-12 20:15:44,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:44,568 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2641 transitions. [2021-06-12 20:15:44,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:15:44,569 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:15:44,569 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:15:44,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3835 [2021-06-12 20:15:44,769 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:15:44,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:15:44,770 INFO L82 PathProgramCache]: Analyzing trace with hash -335500874, now seen corresponding path program 229 times [2021-06-12 20:15:44,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:15:44,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519443871] [2021-06-12 20:15:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:15:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:15:44,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:15:44,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519443871] [2021-06-12 20:15:44,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519443871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:44,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926758627] [2021-06-12 20:15:44,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:45,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:15:45,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:15:45,494 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_135, ends_with_6], 1=[ends_with_2]} [2021-06-12 20:15:45,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:45,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:45,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:15:45,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:45,571 INFO L628 ElimStorePlain]: treesize reduction 239, result has 22.9 percent of original size [2021-06-12 20:15:45,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:45,574 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:45,610 INFO L628 ElimStorePlain]: treesize reduction 24, result has 64.2 percent of original size [2021-06-12 20:15:45,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:45,613 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:45,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:45,616 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:45,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:15:45,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:15:45,630 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:337, output treesize:20 [2021-06-12 20:15:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:15:45,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926758627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:45,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:15:45,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-12 20:15:45,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356569734] [2021-06-12 20:15:45,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:15:45,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:15:45,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:15:45,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:15:45,685 INFO L87 Difference]: Start difference. First operand 812 states and 2641 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:47,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:15:47,139 INFO L93 Difference]: Finished difference Result 1104 states and 3428 transitions. [2021-06-12 20:15:47,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:15:47,139 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:15:47,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:15:47,140 INFO L225 Difference]: With dead ends: 1104 [2021-06-12 20:15:47,140 INFO L226 Difference]: Without dead ends: 1044 [2021-06-12 20:15:47,141 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1208.2ms TimeCoverageRelationStatistics Valid=209, Invalid=1597, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:15:47,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-12 20:15:47,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 828. [2021-06-12 20:15:47,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 3.259975816203144) internal successors, (2696), 827 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2696 transitions. [2021-06-12 20:15:47,149 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2696 transitions. Word has length 23 [2021-06-12 20:15:47,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:15:47,150 INFO L482 AbstractCegarLoop]: Abstraction has 828 states and 2696 transitions. [2021-06-12 20:15:47,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2696 transitions. [2021-06-12 20:15:47,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:15:47,151 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:15:47,151 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:15:47,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3953 [2021-06-12 20:15:47,361 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:15:47,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:15:47,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1570469962, now seen corresponding path program 230 times [2021-06-12 20:15:47,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:15:47,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651161155] [2021-06-12 20:15:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:15:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:15:47,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:15:47,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651161155] [2021-06-12 20:15:47,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651161155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:47,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872099272] [2021-06-12 20:15:47,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:47,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:15:47,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:15:47,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:15:47,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:15:47,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:47,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:47,798 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-06-12 20:15:47,798 INFO L628 ElimStorePlain]: treesize reduction 28, result has 78.8 percent of original size [2021-06-12 20:15:47,799 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-06-12 20:15:47,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:47,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:47,882 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-12 20:15:47,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:47,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:47,945 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.3 percent of original size [2021-06-12 20:15:47,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:47,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:47,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:15:47,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:15:47,979 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:135, output treesize:59 [2021-06-12 20:15:48,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:48,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:48,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:15:48,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:48,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:48,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:48,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:15:48,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:48,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:15:48,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:48,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:48,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:15:48,416 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:48,524 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-06-12 20:15:48,525 INFO L628 ElimStorePlain]: treesize reduction 104, result has 50.0 percent of original size [2021-06-12 20:15:48,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:48,528 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:48,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:48,532 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:48,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:15:48,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:15:48,578 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:309, output treesize:70 [2021-06-12 20:15:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:15:48,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872099272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:48,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:15:48,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:15:48,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526318902] [2021-06-12 20:15:48,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:15:48,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:15:48,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:15:48,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:15:48,722 INFO L87 Difference]: Start difference. First operand 828 states and 2696 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:50,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:15:50,303 INFO L93 Difference]: Finished difference Result 1373 states and 4181 transitions. [2021-06-12 20:15:50,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:15:50,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:15:50,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:15:50,305 INFO L225 Difference]: With dead ends: 1373 [2021-06-12 20:15:50,305 INFO L226 Difference]: Without dead ends: 1225 [2021-06-12 20:15:50,305 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1286.9ms TimeCoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:15:50,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-06-12 20:15:50,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 850. [2021-06-12 20:15:50,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 3.270906949352179) internal successors, (2777), 849 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:50,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2777 transitions. [2021-06-12 20:15:50,315 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2777 transitions. Word has length 23 [2021-06-12 20:15:50,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:15:50,315 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2777 transitions. [2021-06-12 20:15:50,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:50,315 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2777 transitions. [2021-06-12 20:15:50,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:15:50,316 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:15:50,316 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:15:50,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:50,517 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:15:50,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:15:50,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1231172060, now seen corresponding path program 231 times [2021-06-12 20:15:50,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:15:50,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519337006] [2021-06-12 20:15:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:15:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:15:50,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:15:50,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519337006] [2021-06-12 20:15:50,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519337006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:50,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193370912] [2021-06-12 20:15:50,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:50,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:15:50,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:15:50,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:15:50,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:15:50,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:50,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:50,879 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:15:50,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:50,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:50,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:50,964 INFO L628 ElimStorePlain]: treesize reduction 10, result has 90.9 percent of original size [2021-06-12 20:15:50,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:50,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:51,015 INFO L628 ElimStorePlain]: treesize reduction 41, result has 57.7 percent of original size [2021-06-12 20:15:51,016 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-12 20:15:51,016 INFO L518 ElimStorePlain]: Eliminatee v_prenex_142 vanished before elimination [2021-06-12 20:15:51,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:15:51,019 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:144, output treesize:48 [2021-06-12 20:15:51,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:51,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:51,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:15:51,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:51,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:51,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:51,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:15:51,326 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:51,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:51,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:51,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:15:51,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:51,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:51,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:51,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:15:51,334 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:51,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:51,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:15:51,337 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:51,393 INFO L628 ElimStorePlain]: treesize reduction 45, result has 55.9 percent of original size [2021-06-12 20:15:51,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:15:51,394 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:178, output treesize:41 [2021-06-12 20:15:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:15:51,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193370912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:51,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:15:51,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:15:51,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583241473] [2021-06-12 20:15:51,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:15:51,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:15:51,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:15:51,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:15:51,473 INFO L87 Difference]: Start difference. First operand 850 states and 2777 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:52,135 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-06-12 20:15:52,580 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-06-12 20:15:53,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:15:53,188 INFO L93 Difference]: Finished difference Result 1420 states and 4421 transitions. [2021-06-12 20:15:53,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:15:53,188 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:15:53,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:15:53,190 INFO L225 Difference]: With dead ends: 1420 [2021-06-12 20:15:53,190 INFO L226 Difference]: Without dead ends: 1359 [2021-06-12 20:15:53,190 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1713.9ms TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:15:53,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-12 20:15:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 871. [2021-06-12 20:15:53,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.264367816091954) internal successors, (2840), 870 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:53,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2840 transitions. [2021-06-12 20:15:53,200 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2840 transitions. Word has length 23 [2021-06-12 20:15:53,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:15:53,201 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2840 transitions. [2021-06-12 20:15:53,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:53,201 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2840 transitions. [2021-06-12 20:15:53,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:15:53,202 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:15:53,202 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:15:53,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4186 [2021-06-12 20:15:53,402 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:15:53,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:15:53,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1298345444, now seen corresponding path program 232 times [2021-06-12 20:15:53,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:15:53,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511134586] [2021-06-12 20:15:53,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:15:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:15:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:15:53,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:15:53,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511134586] [2021-06-12 20:15:53,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511134586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:53,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981813002] [2021-06-12 20:15:53,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:53,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:15:53,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:15:53,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:15:53,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:15:53,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:53,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:53,774 INFO L628 ElimStorePlain]: treesize reduction 74, result has 47.5 percent of original size [2021-06-12 20:15:53,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:15:53,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:53,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:53,780 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:53,835 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.3 percent of original size [2021-06-12 20:15:53,835 INFO L518 ElimStorePlain]: Eliminatee v_prenex_147 vanished before elimination [2021-06-12 20:15:53,835 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-12 20:15:53,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:15:53,837 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:144, output treesize:48 [2021-06-12 20:15:54,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:54,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:54,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:15:54,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:54,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:54,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:54,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:15:54,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:54,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:54,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:54,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:15:54,414 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:54,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:15:54,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:15:54,418 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:54,547 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-12 20:15:54,547 INFO L628 ElimStorePlain]: treesize reduction 105, result has 54.1 percent of original size [2021-06-12 20:15:54,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:54,551 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:54,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:15:54,555 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:15:54,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:15:54,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 20:15:54,610 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:301, output treesize:80 [2021-06-12 20:15:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:15:54,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981813002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:15:54,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:15:54,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 20:15:54,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466049215] [2021-06-12 20:15:54,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:15:54,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:15:54,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:15:54,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:15:54,772 INFO L87 Difference]: Start difference. First operand 871 states and 2840 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:55,169 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-06-12 20:15:55,823 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-12 20:15:56,200 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-12 20:15:56,427 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-12 20:15:56,673 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-12 20:15:56,998 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-06-12 20:15:57,173 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-06-12 20:15:57,404 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-06-12 20:15:57,577 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-06-12 20:15:57,718 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-12 20:15:57,864 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-06-12 20:15:58,117 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-06-12 20:15:58,292 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-06-12 20:15:58,478 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-12 20:15:58,658 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-12 20:15:58,817 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-12 20:15:58,977 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-12 20:15:59,126 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-12 20:15:59,301 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-06-12 20:15:59,470 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-12 20:15:59,636 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-06-12 20:15:59,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:15:59,658 INFO L93 Difference]: Finished difference Result 1820 states and 5668 transitions. [2021-06-12 20:15:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:15:59,658 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:15:59,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:15:59,661 INFO L225 Difference]: With dead ends: 1820 [2021-06-12 20:15:59,661 INFO L226 Difference]: Without dead ends: 1637 [2021-06-12 20:15:59,661 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 4670.8ms TimeCoverageRelationStatistics Valid=624, Invalid=2916, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:15:59,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-12 20:15:59,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 881. [2021-06-12 20:15:59,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 3.2738636363636364) internal successors, (2881), 880 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:59,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2881 transitions. [2021-06-12 20:15:59,673 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2881 transitions. Word has length 23 [2021-06-12 20:15:59,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:15:59,673 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 2881 transitions. [2021-06-12 20:15:59,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:15:59,673 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2881 transitions. [2021-06-12 20:15:59,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:15:59,674 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:15:59,674 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:15:59,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4249,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:15:59,875 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:15:59,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:15:59,875 INFO L82 PathProgramCache]: Analyzing trace with hash -101275790, now seen corresponding path program 233 times [2021-06-12 20:15:59,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:15:59,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453994838] [2021-06-12 20:15:59,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:15:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:16:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:16:00,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:16:00,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453994838] [2021-06-12 20:16:00,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453994838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:00,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309236151] [2021-06-12 20:16:00,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:00,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:16:00,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:16:00,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:16:00,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:16:00,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:16:00,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:00,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:00,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:00,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:00,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:00,482 INFO L628 ElimStorePlain]: treesize reduction 24, result has 78.4 percent of original size [2021-06-12 20:16:00,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:00,486 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:00,541 INFO L628 ElimStorePlain]: treesize reduction 22, result has 73.5 percent of original size [2021-06-12 20:16:00,541 INFO L518 ElimStorePlain]: Eliminatee v_prenex_152 vanished before elimination [2021-06-12 20:16:00,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-12 20:16:00,544 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:122, output treesize:61 [2021-06-12 20:16:00,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:00,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:00,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:16:00,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:00,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:00,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:00,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:16:00,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:00,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:00,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:00,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:16:00,921 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:00,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:00,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:16:00,926 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:00,997 INFO L628 ElimStorePlain]: treesize reduction 79, result has 42.3 percent of original size [2021-06-12 20:16:01,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:16:01,001 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:01,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:16:01,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:16:01,033 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:207, output treesize:33 [2021-06-12 20:16:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:16:01,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309236151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:01,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:16:01,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:16:01,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586832354] [2021-06-12 20:16:01,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:16:01,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:16:01,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:16:01,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:16:01,112 INFO L87 Difference]: Start difference. First operand 881 states and 2881 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:01,520 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-06-12 20:16:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:16:01,733 INFO L93 Difference]: Finished difference Result 1350 states and 4249 transitions. [2021-06-12 20:16:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:16:01,733 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:16:01,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:16:01,736 INFO L225 Difference]: With dead ends: 1350 [2021-06-12 20:16:01,736 INFO L226 Difference]: Without dead ends: 1305 [2021-06-12 20:16:01,736 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 824.6ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:16:01,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-06-12 20:16:01,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 896. [2021-06-12 20:16:01,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.275977653631285) internal successors, (2932), 895 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2932 transitions. [2021-06-12 20:16:01,765 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2932 transitions. Word has length 23 [2021-06-12 20:16:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:16:01,765 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2932 transitions. [2021-06-12 20:16:01,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:01,765 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2932 transitions. [2021-06-12 20:16:01,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:16:01,766 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:16:01,766 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:16:01,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4395 [2021-06-12 20:16:01,990 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:16:01,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:16:01,990 INFO L82 PathProgramCache]: Analyzing trace with hash 54833778, now seen corresponding path program 234 times [2021-06-12 20:16:01,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:16:01,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154709284] [2021-06-12 20:16:01,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:16:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:16:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:02,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:16:02,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154709284] [2021-06-12 20:16:02,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154709284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:02,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325117662] [2021-06-12 20:16:02,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:02,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:16:02,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:16:02,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:16:02,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:16:02,887 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_156, ends_with_10], 1=[ends_with_6]} [2021-06-12 20:16:02,891 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:16:02,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:02,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:02,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:02,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:02,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:02,906 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:16:02,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:02,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:02,912 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:02,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:16:02,916 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:02,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:16:02,923 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:02,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:16:02,928 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:02,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:16:02,932 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:02,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:16:02,940 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:02,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:16:02,967 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:02,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:02,972 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:02,975 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:16:02,976 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:02,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:16:02,980 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:02,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:02,989 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:03,136 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-06-12 20:16:03,137 INFO L628 ElimStorePlain]: treesize reduction 135, result has 46.9 percent of original size [2021-06-12 20:16:03,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:16:03,142 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:03,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:16:03,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:16:03,203 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:03,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:03,207 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:03,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:03,211 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:03,278 INFO L628 ElimStorePlain]: treesize reduction 46, result has 56.2 percent of original size [2021-06-12 20:16:03,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:16:03,279 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 4 variables, input treesize:581, output treesize:35 [2021-06-12 20:16:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:16:03,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325117662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:03,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:16:03,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-12 20:16:03,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672646288] [2021-06-12 20:16:03,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:16:03,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:16:03,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:16:03,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:16:03,507 INFO L87 Difference]: Start difference. First operand 896 states and 2932 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:03,742 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-12 20:16:03,961 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-12 20:16:04,149 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-12 20:16:04,412 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-06-12 20:16:04,681 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-12 20:16:05,165 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-06-12 20:16:05,316 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-06-12 20:16:05,593 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-12 20:16:05,877 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-06-12 20:16:06,261 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-06-12 20:16:06,427 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-12 20:16:07,691 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-06-12 20:16:08,050 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-06-12 20:16:08,258 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-06-12 20:16:09,019 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-12 20:16:09,801 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-12 20:16:10,302 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-06-12 20:16:10,461 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-12 20:16:10,848 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-12 20:16:10,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:16:10,862 INFO L93 Difference]: Finished difference Result 2106 states and 6396 transitions. [2021-06-12 20:16:10,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 20:16:10,862 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:16:10,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:16:10,865 INFO L225 Difference]: With dead ends: 2106 [2021-06-12 20:16:10,865 INFO L226 Difference]: Without dead ends: 1979 [2021-06-12 20:16:10,866 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 6759.3ms TimeCoverageRelationStatistics Valid=787, Invalid=5533, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 20:16:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2021-06-12 20:16:10,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 944. [2021-06-12 20:16:10,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 3.291622481442206) internal successors, (3104), 943 states have internal predecessors, (3104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 3104 transitions. [2021-06-12 20:16:10,883 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 3104 transitions. Word has length 23 [2021-06-12 20:16:10,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:16:10,883 INFO L482 AbstractCegarLoop]: Abstraction has 944 states and 3104 transitions. [2021-06-12 20:16:10,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:10,883 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 3104 transitions. [2021-06-12 20:16:10,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:16:10,884 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:16:10,884 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:16:11,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4484,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:11,093 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:16:11,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:16:11,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1457185666, now seen corresponding path program 235 times [2021-06-12 20:16:11,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:16:11,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111266648] [2021-06-12 20:16:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:16:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:16:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:11,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:16:11,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111266648] [2021-06-12 20:16:11,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111266648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:11,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241375479] [2021-06-12 20:16:11,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:16:11,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:16:11,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:16:11,906 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_157, v_prenex_159, v_prenex_158, ends_with_10], 1=[ends_with_6]} [2021-06-12 20:16:11,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:16:11,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:11,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:16:11,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:12,021 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-06-12 20:16:12,022 INFO L628 ElimStorePlain]: treesize reduction 178, result has 31.0 percent of original size [2021-06-12 20:16:12,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:12,026 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:12,099 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.7 percent of original size [2021-06-12 20:16:12,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:16:12,104 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:12,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:16:12,139 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-12 20:16:12,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:12,144 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:12,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:16:12,149 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:12,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:12,153 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:12,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:16:12,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:16:12,184 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:288, output treesize:35 [2021-06-12 20:16:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:16:12,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241375479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:12,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:16:12,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-12 20:16:12,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454695033] [2021-06-12 20:16:12,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:16:12,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:16:12,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:16:12,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:16:12,269 INFO L87 Difference]: Start difference. First operand 944 states and 3104 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:14,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:16:14,420 INFO L93 Difference]: Finished difference Result 1399 states and 4433 transitions. [2021-06-12 20:16:14,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:16:14,421 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:16:14,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:16:14,423 INFO L225 Difference]: With dead ends: 1399 [2021-06-12 20:16:14,423 INFO L226 Difference]: Without dead ends: 1345 [2021-06-12 20:16:14,423 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1716.2ms TimeCoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:16:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2021-06-12 20:16:14,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 928. [2021-06-12 20:16:14,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.2837108953613807) internal successors, (3044), 927 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3044 transitions. [2021-06-12 20:16:14,437 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3044 transitions. Word has length 23 [2021-06-12 20:16:14,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:16:14,437 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3044 transitions. [2021-06-12 20:16:14,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:14,437 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3044 transitions. [2021-06-12 20:16:14,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:16:14,438 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:16:14,438 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:16:14,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4563 [2021-06-12 20:16:14,653 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:16:14,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:16:14,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1635109126, now seen corresponding path program 236 times [2021-06-12 20:16:14,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:16:14,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596471310] [2021-06-12 20:16:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:16:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:16:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:14,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:16:14,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596471310] [2021-06-12 20:16:14,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596471310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:14,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064252955] [2021-06-12 20:16:14,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:14,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:16:14,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:16:14,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:16:14,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:16:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:15,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064252955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:15,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:16:15,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:16:15,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923392719] [2021-06-12 20:16:15,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:16:15,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:16:15,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:16:15,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:16:15,201 INFO L87 Difference]: Start difference. First operand 928 states and 3044 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:16,228 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-06-12 20:16:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:16:16,471 INFO L93 Difference]: Finished difference Result 1707 states and 5349 transitions. [2021-06-12 20:16:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:16:16,471 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:16:16,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:16:16,474 INFO L225 Difference]: With dead ends: 1707 [2021-06-12 20:16:16,474 INFO L226 Difference]: Without dead ends: 1617 [2021-06-12 20:16:16,474 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1273.5ms TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:16:16,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-06-12 20:16:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 952. [2021-06-12 20:16:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 3.305993690851735) internal successors, (3144), 951 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:16,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 3144 transitions. [2021-06-12 20:16:16,490 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 3144 transitions. Word has length 23 [2021-06-12 20:16:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:16:16,490 INFO L482 AbstractCegarLoop]: Abstraction has 952 states and 3144 transitions. [2021-06-12 20:16:16,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:16,491 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 3144 transitions. [2021-06-12 20:16:16,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:16:16,492 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:16:16,492 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:16:16,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4617,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:16,710 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:16:16,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:16:16,710 INFO L82 PathProgramCache]: Analyzing trace with hash 2049337868, now seen corresponding path program 237 times [2021-06-12 20:16:16,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:16:16,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362835618] [2021-06-12 20:16:16,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:16:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:16:16,933 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2021-06-12 20:16:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:17,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:16:17,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362835618] [2021-06-12 20:16:17,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362835618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:17,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152928455] [2021-06-12 20:16:17,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:17,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:16:17,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:16:17,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:16:17,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:16:17,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:16:17,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:17,344 INFO L628 ElimStorePlain]: treesize reduction 30, result has 68.8 percent of original size [2021-06-12 20:16:17,344 INFO L518 ElimStorePlain]: Eliminatee v_prenex_160 vanished before elimination [2021-06-12 20:16:17,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:17,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:17,756 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-06-12 20:16:17,756 INFO L628 ElimStorePlain]: treesize reduction 24, result has 61.3 percent of original size [2021-06-12 20:16:17,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:16:17,758 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:99, output treesize:30 [2021-06-12 20:16:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:16:18,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152928455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:18,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:16:18,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-12 20:16:18,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893176760] [2021-06-12 20:16:18,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:16:18,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:16:18,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:16:18,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:16:18,115 INFO L87 Difference]: Start difference. First operand 952 states and 3144 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:19,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:16:19,219 INFO L93 Difference]: Finished difference Result 1367 states and 4382 transitions. [2021-06-12 20:16:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:16:19,219 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:16:19,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:16:19,221 INFO L225 Difference]: With dead ends: 1367 [2021-06-12 20:16:19,221 INFO L226 Difference]: Without dead ends: 1313 [2021-06-12 20:16:19,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1084.3ms TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:16:19,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-06-12 20:16:19,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 974. [2021-06-12 20:16:19,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 3.3072970195272355) internal successors, (3218), 973 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:19,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 3218 transitions. [2021-06-12 20:16:19,236 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 3218 transitions. Word has length 23 [2021-06-12 20:16:19,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:16:19,236 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 3218 transitions. [2021-06-12 20:16:19,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:19,236 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 3218 transitions. [2021-06-12 20:16:19,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:16:19,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:16:19,237 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:16:19,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4631,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:19,460 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:16:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:16:19,460 INFO L82 PathProgramCache]: Analyzing trace with hash -344567604, now seen corresponding path program 238 times [2021-06-12 20:16:19,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:16:19,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40373211] [2021-06-12 20:16:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:16:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:16:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:19,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:16:19,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40373211] [2021-06-12 20:16:19,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40373211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:19,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636935895] [2021-06-12 20:16:19,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:19,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:16:19,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:16:19,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:16:19,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:16:20,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:20,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:20,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:16:20,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:20,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:20,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:20,157 INFO L628 ElimStorePlain]: treesize reduction 24, result has 78.4 percent of original size [2021-06-12 20:16:20,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:16:20,161 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:20,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:16:20,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:20,223 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:20,277 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-06-12 20:16:20,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-12 20:16:20,280 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:122, output treesize:61 [2021-06-12 20:16:20,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:20,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:20,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:16:20,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:20,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:20,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:20,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:16:20,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:20,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:20,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:20,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:16:20,637 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:20,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:20,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:16:20,641 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:20,708 INFO L628 ElimStorePlain]: treesize reduction 84, result has 42.9 percent of original size [2021-06-12 20:16:20,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:20,712 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:20,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:20,715 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:20,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:16:20,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:16:20,740 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:209, output treesize:33 [2021-06-12 20:16:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:20,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636935895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:20,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:16:20,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:16:20,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663777194] [2021-06-12 20:16:20,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:16:20,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:16:20,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:16:20,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:16:20,805 INFO L87 Difference]: Start difference. First operand 974 states and 3218 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:21,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:16:21,417 INFO L93 Difference]: Finished difference Result 1750 states and 5441 transitions. [2021-06-12 20:16:21,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:16:21,418 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:16:21,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:16:21,420 INFO L225 Difference]: With dead ends: 1750 [2021-06-12 20:16:21,420 INFO L226 Difference]: Without dead ends: 1627 [2021-06-12 20:16:21,420 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 778.8ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:16:21,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-06-12 20:16:21,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 992. [2021-06-12 20:16:21,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.2986881937436934) internal successors, (3269), 991 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:21,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3269 transitions. [2021-06-12 20:16:21,433 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3269 transitions. Word has length 23 [2021-06-12 20:16:21,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:16:21,433 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3269 transitions. [2021-06-12 20:16:21,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3269 transitions. [2021-06-12 20:16:21,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:16:21,435 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:16:21,435 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:16:21,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4687,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:21,640 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:16:21,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:16:21,646 INFO L82 PathProgramCache]: Analyzing trace with hash -545544782, now seen corresponding path program 239 times [2021-06-12 20:16:21,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:16:21,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699323003] [2021-06-12 20:16:21,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:16:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:16:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:16:21,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:16:21,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699323003] [2021-06-12 20:16:21,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699323003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:21,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43404906] [2021-06-12 20:16:21,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:21,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:16:21,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:16:21,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:16:21,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:16:21,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:16:21,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:22,042 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.7 percent of original size [2021-06-12 20:16:22,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:22,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:22,120 INFO L628 ElimStorePlain]: treesize reduction 19, result has 77.4 percent of original size [2021-06-12 20:16:22,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:16:22,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:22,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:16:22,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:22,158 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:22,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:16:22,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:16:22,192 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:95, output treesize:53 [2021-06-12 20:16:23,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:16:23,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:23,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:23,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:23,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:16:23,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:23,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:23,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:16:23,123 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:23,152 INFO L628 ElimStorePlain]: treesize reduction 20, result has 56.5 percent of original size [2021-06-12 20:16:23,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:16:23,153 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:77, output treesize:20 [2021-06-12 20:16:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:16:23,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43404906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:23,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:16:23,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:16:23,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803241945] [2021-06-12 20:16:23,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:16:23,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:16:23,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:16:23,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:16:23,226 INFO L87 Difference]: Start difference. First operand 992 states and 3269 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:23,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:16:23,595 INFO L93 Difference]: Finished difference Result 1547 states and 4889 transitions. [2021-06-12 20:16:23,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:16:23,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:16:23,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:16:23,604 INFO L225 Difference]: With dead ends: 1547 [2021-06-12 20:16:23,604 INFO L226 Difference]: Without dead ends: 1502 [2021-06-12 20:16:23,604 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 513.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:16:23,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-12 20:16:23,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 992. [2021-06-12 20:16:23,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.2986881937436934) internal successors, (3269), 991 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:23,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3269 transitions. [2021-06-12 20:16:23,624 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3269 transitions. Word has length 23 [2021-06-12 20:16:23,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:16:23,624 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3269 transitions. [2021-06-12 20:16:23,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:23,624 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3269 transitions. [2021-06-12 20:16:23,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:16:23,625 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:16:23,625 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:16:23,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4734,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:23,843 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:16:23,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:16:23,844 INFO L82 PathProgramCache]: Analyzing trace with hash 191678748, now seen corresponding path program 240 times [2021-06-12 20:16:23,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:16:23,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510851649] [2021-06-12 20:16:23,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:16:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:16:24,114 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-06-12 20:16:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:24,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:16:24,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510851649] [2021-06-12 20:16:24,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510851649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:24,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080839527] [2021-06-12 20:16:24,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:24,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:16:24,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:16:24,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:16:24,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:16:24,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:24,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:24,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:24,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:24,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:24,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:24,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:16:24,596 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:24,655 INFO L628 ElimStorePlain]: treesize reduction 54, result has 53.0 percent of original size [2021-06-12 20:16:24,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:16:24,659 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:24,696 INFO L628 ElimStorePlain]: treesize reduction 20, result has 65.5 percent of original size [2021-06-12 20:16:24,696 INFO L518 ElimStorePlain]: Eliminatee v_prenex_172 vanished before elimination [2021-06-12 20:16:24,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:16:24,698 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:154, output treesize:30 [2021-06-12 20:16:24,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:24,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:24,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:16:24,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:24,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:24,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:24,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:16:24,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:24,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:24,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:24,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:16:24,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:24,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:24,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:16:24,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:25,045 INFO L628 ElimStorePlain]: treesize reduction 32, result has 66.3 percent of original size [2021-06-12 20:16:25,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:16:25,046 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:163, output treesize:47 [2021-06-12 20:16:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:16:25,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080839527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:25,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:16:25,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-12 20:16:25,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168727580] [2021-06-12 20:16:25,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:16:25,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:16:25,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:16:25,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:16:25,179 INFO L87 Difference]: Start difference. First operand 992 states and 3269 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:25,325 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-12 20:16:25,460 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-06-12 20:16:25,614 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-06-12 20:16:25,873 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-06-12 20:16:27,330 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-06-12 20:16:28,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:16:28,649 INFO L93 Difference]: Finished difference Result 1786 states and 5586 transitions. [2021-06-12 20:16:28,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:16:28,650 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:16:28,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:16:28,652 INFO L225 Difference]: With dead ends: 1786 [2021-06-12 20:16:28,652 INFO L226 Difference]: Without dead ends: 1628 [2021-06-12 20:16:28,653 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 3276.2ms TimeCoverageRelationStatistics Valid=393, Invalid=2469, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:16:28,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-06-12 20:16:28,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1009. [2021-06-12 20:16:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 3.3055555555555554) internal successors, (3332), 1008 states have internal predecessors, (3332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:28,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 3332 transitions. [2021-06-12 20:16:28,666 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 3332 transitions. Word has length 23 [2021-06-12 20:16:28,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:16:28,666 INFO L482 AbstractCegarLoop]: Abstraction has 1009 states and 3332 transitions. [2021-06-12 20:16:28,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:28,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 3332 transitions. [2021-06-12 20:16:28,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:16:28,667 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:16:28,667 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:16:28,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4799,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:28,868 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:16:28,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:16:28,868 INFO L82 PathProgramCache]: Analyzing trace with hash -345814108, now seen corresponding path program 241 times [2021-06-12 20:16:28,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:16:28,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181135530] [2021-06-12 20:16:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:16:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:16:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:29,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:16:29,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181135530] [2021-06-12 20:16:29,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181135530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:29,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290380588] [2021-06-12 20:16:29,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:29,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:16:29,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:16:29,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:16:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:29,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290380588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:29,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:16:29,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-12 20:16:29,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366240371] [2021-06-12 20:16:29,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:16:29,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:16:29,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:16:29,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:16:29,570 INFO L87 Difference]: Start difference. First operand 1009 states and 3332 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:29,811 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-12 20:16:31,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:16:31,900 INFO L93 Difference]: Finished difference Result 1485 states and 4760 transitions. [2021-06-12 20:16:31,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:16:31,900 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:16:31,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:16:31,902 INFO L225 Difference]: With dead ends: 1485 [2021-06-12 20:16:31,902 INFO L226 Difference]: Without dead ends: 1428 [2021-06-12 20:16:31,902 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 2035.6ms TimeCoverageRelationStatistics Valid=335, Invalid=2317, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:16:31,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-06-12 20:16:31,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1033. [2021-06-12 20:16:31,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 3.302325581395349) internal successors, (3408), 1032 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:31,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3408 transitions. [2021-06-12 20:16:31,914 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3408 transitions. Word has length 23 [2021-06-12 20:16:31,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:16:31,914 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 3408 transitions. [2021-06-12 20:16:31,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:31,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3408 transitions. [2021-06-12 20:16:31,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:16:31,915 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:16:31,915 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:16:32,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4895,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:32,115 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:16:32,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:16:32,116 INFO L82 PathProgramCache]: Analyzing trace with hash 602455156, now seen corresponding path program 242 times [2021-06-12 20:16:32,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:16:32,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560165117] [2021-06-12 20:16:32,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:16:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:16:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:32,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:16:32,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560165117] [2021-06-12 20:16:32,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560165117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:32,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786921347] [2021-06-12 20:16:32,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:32,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:16:32,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:16:32,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:16:32,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:16:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:32,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786921347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:32,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:16:32,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-12 20:16:32,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035007537] [2021-06-12 20:16:32,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:16:32,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:16:32,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:16:32,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:16:32,696 INFO L87 Difference]: Start difference. First operand 1033 states and 3408 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:37,166 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-06-12 20:16:37,720 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2021-06-12 20:16:38,180 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2021-06-12 20:16:38,887 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2021-06-12 20:16:39,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:16:39,022 INFO L93 Difference]: Finished difference Result 2426 states and 7114 transitions. [2021-06-12 20:16:39,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-06-12 20:16:39,022 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:16:39,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:16:39,025 INFO L225 Difference]: With dead ends: 2426 [2021-06-12 20:16:39,025 INFO L226 Difference]: Without dead ends: 2105 [2021-06-12 20:16:39,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4198 ImplicationChecksByTransitivity, 5140.5ms TimeCoverageRelationStatistics Valid=895, Invalid=11095, Unknown=0, NotChecked=0, Total=11990 [2021-06-12 20:16:39,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2021-06-12 20:16:39,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1097. [2021-06-12 20:16:39,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1096 states have (on average 3.31478102189781) internal successors, (3633), 1096 states have internal predecessors, (3633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 3633 transitions. [2021-06-12 20:16:39,041 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 3633 transitions. Word has length 23 [2021-06-12 20:16:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:16:39,042 INFO L482 AbstractCegarLoop]: Abstraction has 1097 states and 3633 transitions. [2021-06-12 20:16:39,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 3633 transitions. [2021-06-12 20:16:39,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:16:39,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:16:39,043 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:16:39,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4909 [2021-06-12 20:16:39,243 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:16:39,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:16:39,243 INFO L82 PathProgramCache]: Analyzing trace with hash 298857606, now seen corresponding path program 243 times [2021-06-12 20:16:39,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:16:39,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769948320] [2021-06-12 20:16:39,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:16:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:16:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:39,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:16:39,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769948320] [2021-06-12 20:16:39,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769948320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:39,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109824462] [2021-06-12 20:16:39,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:39,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:16:39,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:16:39,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:16:39,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:16:39,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:16:39,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:39,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:39,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:39,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:39,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:39,642 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-06-12 20:16:39,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:16:39,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:39,683 INFO L628 ElimStorePlain]: treesize reduction 20, result has 65.5 percent of original size [2021-06-12 20:16:39,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:16:39,685 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:127, output treesize:30 [2021-06-12 20:16:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:39,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109824462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:39,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:16:39,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-12 20:16:39,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640574549] [2021-06-12 20:16:39,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:16:39,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:16:39,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:16:39,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:16:39,952 INFO L87 Difference]: Start difference. First operand 1097 states and 3633 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:41,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:16:41,764 INFO L93 Difference]: Finished difference Result 1772 states and 5608 transitions. [2021-06-12 20:16:41,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:16:41,764 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:16:41,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:16:41,767 INFO L225 Difference]: With dead ends: 1772 [2021-06-12 20:16:41,767 INFO L226 Difference]: Without dead ends: 1670 [2021-06-12 20:16:41,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1340.1ms TimeCoverageRelationStatistics Valid=239, Invalid=2113, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:16:41,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-06-12 20:16:41,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1102. [2021-06-12 20:16:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.31244323342416) internal successors, (3647), 1101 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3647 transitions. [2021-06-12 20:16:41,780 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3647 transitions. Word has length 23 [2021-06-12 20:16:41,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:16:41,780 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 3647 transitions. [2021-06-12 20:16:41,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:41,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3647 transitions. [2021-06-12 20:16:41,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:16:41,781 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:16:41,781 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:16:41,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4923 [2021-06-12 20:16:41,981 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:16:41,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:16:41,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1212178272, now seen corresponding path program 244 times [2021-06-12 20:16:41,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:16:41,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825176470] [2021-06-12 20:16:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:16:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:16:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:42,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:16:42,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825176470] [2021-06-12 20:16:42,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825176470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:42,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406578271] [2021-06-12 20:16:42,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:42,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:16:42,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:16:42,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:16:42,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:16:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:42,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406578271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:42,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:16:42,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-12 20:16:42,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803330238] [2021-06-12 20:16:42,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:16:42,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:16:42,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:16:42,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:16:42,662 INFO L87 Difference]: Start difference. First operand 1102 states and 3647 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:43,003 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-12 20:16:45,186 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-06-12 20:16:46,072 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-12 20:16:47,393 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-06-12 20:16:47,678 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-12 20:16:47,945 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-06-12 20:16:48,350 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-12 20:16:48,950 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-12 20:16:49,277 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-06-12 20:16:49,583 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-06-12 20:16:49,913 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-06-12 20:16:50,581 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-06-12 20:16:50,727 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-12 20:16:50,889 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-12 20:16:51,013 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-12 20:16:51,600 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-06-12 20:16:52,388 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-12 20:16:52,580 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-06-12 20:16:52,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:16:52,584 INFO L93 Difference]: Finished difference Result 2858 states and 8256 transitions. [2021-06-12 20:16:52,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-06-12 20:16:52,584 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:16:52,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:16:52,588 INFO L225 Difference]: With dead ends: 2858 [2021-06-12 20:16:52,588 INFO L226 Difference]: Without dead ends: 2444 [2021-06-12 20:16:52,589 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5806 ImplicationChecksByTransitivity, 8674.3ms TimeCoverageRelationStatistics Valid=1328, Invalid=15184, Unknown=0, NotChecked=0, Total=16512 [2021-06-12 20:16:52,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-06-12 20:16:52,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1160. [2021-06-12 20:16:52,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1159 states have (on average 3.3339085418464194) internal successors, (3864), 1159 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 3864 transitions. [2021-06-12 20:16:52,612 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 3864 transitions. Word has length 23 [2021-06-12 20:16:52,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:16:52,612 INFO L482 AbstractCegarLoop]: Abstraction has 1160 states and 3864 transitions. [2021-06-12 20:16:52,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:52,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 3864 transitions. [2021-06-12 20:16:52,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:16:52,614 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:16:52,614 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:16:52,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4964,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:52,815 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:16:52,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:16:52,815 INFO L82 PathProgramCache]: Analyzing trace with hash -235280272, now seen corresponding path program 245 times [2021-06-12 20:16:52,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:16:52,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183000129] [2021-06-12 20:16:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:16:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:16:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:53,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:16:53,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183000129] [2021-06-12 20:16:53,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183000129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:53,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40908028] [2021-06-12 20:16:53,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:53,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:16:53,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:16:53,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 20:16:53,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:16:53,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:53,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:53,459 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-06-12 20:16:53,459 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.9 percent of original size [2021-06-12 20:16:53,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:53,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:53,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:16:53,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:16:53,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:53,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:16:53,530 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:53,597 INFO L628 ElimStorePlain]: treesize reduction 49, result has 57.0 percent of original size [2021-06-12 20:16:53,597 INFO L518 ElimStorePlain]: Eliminatee v_prenex_174 vanished before elimination [2021-06-12 20:16:53,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:16:53,600 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:132, output treesize:57 [2021-06-12 20:16:54,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:54,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:54,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:16:54,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:54,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:54,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:54,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:16:54,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:54,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:54,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:54,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:16:54,271 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:54,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:54,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:54,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:16:54,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:54,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:16:54,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:16:54,284 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:54,459 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-06-12 20:16:54,460 INFO L628 ElimStorePlain]: treesize reduction 153, result has 44.8 percent of original size [2021-06-12 20:16:54,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:54,465 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:54,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:16:54,470 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:16:54,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:16:54,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 20:16:54,547 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:363, output treesize:80 [2021-06-12 20:16:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:54,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40908028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:54,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:16:54,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-12 20:16:54,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271954454] [2021-06-12 20:16:54,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:16:54,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:16:54,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:16:54,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:16:54,744 INFO L87 Difference]: Start difference. First operand 1160 states and 3864 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:55,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:16:55,794 INFO L93 Difference]: Finished difference Result 1864 states and 5964 transitions. [2021-06-12 20:16:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:16:55,795 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:16:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:16:55,797 INFO L225 Difference]: With dead ends: 1864 [2021-06-12 20:16:55,797 INFO L226 Difference]: Without dead ends: 1756 [2021-06-12 20:16:55,797 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1190.8ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:16:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-06-12 20:16:55,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1159. [2021-06-12 20:16:55,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1158 states have (on average 3.3367875647668392) internal successors, (3864), 1158 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 3864 transitions. [2021-06-12 20:16:55,820 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 3864 transitions. Word has length 23 [2021-06-12 20:16:55,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:16:55,820 INFO L482 AbstractCegarLoop]: Abstraction has 1159 states and 3864 transitions. [2021-06-12 20:16:55,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:55,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 3864 transitions. [2021-06-12 20:16:55,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:16:55,821 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:16:55,822 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:16:56,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4985,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:56,022 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:16:56,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:16:56,023 INFO L82 PathProgramCache]: Analyzing trace with hash -602834382, now seen corresponding path program 246 times [2021-06-12 20:16:56,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:16:56,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331880005] [2021-06-12 20:16:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:16:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:16:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:16:56,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:16:56,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331880005] [2021-06-12 20:16:56,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331880005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:56,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228139548] [2021-06-12 20:16:56,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:16:56,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:16:56,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:16:56,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:16:56,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:16:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:16:56,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228139548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:16:56,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:16:56,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-12 20:16:56,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813964790] [2021-06-12 20:16:56,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:16:56,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:16:56,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:16:56,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:16:56,821 INFO L87 Difference]: Start difference. First operand 1159 states and 3864 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:16:57,604 WARN L205 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-12 20:16:57,728 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-06-12 20:16:58,399 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-06-12 20:16:59,279 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2021-06-12 20:17:00,004 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-06-12 20:17:00,674 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-06-12 20:17:01,229 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-12 20:17:01,544 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2021-06-12 20:17:01,901 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-06-12 20:17:02,046 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-06-12 20:17:02,577 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2021-06-12 20:17:03,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:17:03,114 INFO L93 Difference]: Finished difference Result 2013 states and 6213 transitions. [2021-06-12 20:17:03,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 20:17:03,114 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:17:03,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:17:03,118 INFO L225 Difference]: With dead ends: 2013 [2021-06-12 20:17:03,118 INFO L226 Difference]: Without dead ends: 1908 [2021-06-12 20:17:03,118 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 5460.5ms TimeCoverageRelationStatistics Valid=633, Invalid=4917, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 20:17:03,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-06-12 20:17:03,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1171. [2021-06-12 20:17:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.341025641025641) internal successors, (3909), 1170 states have internal predecessors, (3909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:03,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3909 transitions. [2021-06-12 20:17:03,137 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3909 transitions. Word has length 23 [2021-06-12 20:17:03,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:17:03,137 INFO L482 AbstractCegarLoop]: Abstraction has 1171 states and 3909 transitions. [2021-06-12 20:17:03,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:03,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3909 transitions. [2021-06-12 20:17:03,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:17:03,138 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:17:03,139 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:17:03,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5126,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:03,353 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:17:03,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:17:03,353 INFO L82 PathProgramCache]: Analyzing trace with hash -893034992, now seen corresponding path program 247 times [2021-06-12 20:17:03,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:17:03,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270287055] [2021-06-12 20:17:03,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:17:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:17:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:17:03,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:17:03,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270287055] [2021-06-12 20:17:03,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270287055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:03,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455264069] [2021-06-12 20:17:03,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:17:03,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:17:03,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:17:04,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:04,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:04,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:04,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:04,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:17:04,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:04,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:04,169 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:04,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:04,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:04,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:17:04,175 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:04,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:04,180 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:04,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:04,184 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:04,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:04,189 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:04,377 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-12 20:17:04,378 INFO L628 ElimStorePlain]: treesize reduction 63, result has 70.3 percent of original size [2021-06-12 20:17:04,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-12 20:17:04,386 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:271, output treesize:123 [2021-06-12 20:17:05,269 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-06-12 20:17:05,777 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-12 20:17:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:17:05,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455264069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:05,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:17:05,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-12 20:17:05,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575283397] [2021-06-12 20:17:05,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:17:05,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:17:05,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:17:05,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:17:05,896 INFO L87 Difference]: Start difference. First operand 1171 states and 3909 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:06,833 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-12 20:17:08,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:17:08,095 INFO L93 Difference]: Finished difference Result 1732 states and 5482 transitions. [2021-06-12 20:17:08,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:17:08,096 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:17:08,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:17:08,098 INFO L225 Difference]: With dead ends: 1732 [2021-06-12 20:17:08,098 INFO L226 Difference]: Without dead ends: 1627 [2021-06-12 20:17:08,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 2495.3ms TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:17:08,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-06-12 20:17:08,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1188. [2021-06-12 20:17:08,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 3.3445661331086773) internal successors, (3970), 1187 states have internal predecessors, (3970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:08,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 3970 transitions. [2021-06-12 20:17:08,119 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 3970 transitions. Word has length 23 [2021-06-12 20:17:08,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:17:08,119 INFO L482 AbstractCegarLoop]: Abstraction has 1188 states and 3970 transitions. [2021-06-12 20:17:08,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:08,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 3970 transitions. [2021-06-12 20:17:08,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:17:08,121 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:17:08,121 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:17:08,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5142 [2021-06-12 20:17:08,341 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:17:08,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:17:08,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1872595910, now seen corresponding path program 248 times [2021-06-12 20:17:08,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:17:08,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037036414] [2021-06-12 20:17:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:17:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:17:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:17:08,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:17:08,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037036414] [2021-06-12 20:17:08,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037036414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:08,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710177476] [2021-06-12 20:17:08,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:08,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:17:08,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:17:08,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:17:08,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:17:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:17:09,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710177476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:09,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:17:09,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:17:09,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010360070] [2021-06-12 20:17:09,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:17:09,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:17:09,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:17:09,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:17:09,063 INFO L87 Difference]: Start difference. First operand 1188 states and 3970 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:13,847 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-06-12 20:17:14,246 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-06-12 20:17:14,935 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-06-12 20:17:15,087 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-06-12 20:17:15,237 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-12 20:17:15,592 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-12 20:17:15,756 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-06-12 20:17:15,891 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-12 20:17:16,060 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-12 20:17:16,237 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-06-12 20:17:16,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:17:16,252 INFO L93 Difference]: Finished difference Result 2749 states and 8424 transitions. [2021-06-12 20:17:16,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-12 20:17:16,252 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:17:16,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:17:16,256 INFO L225 Difference]: With dead ends: 2749 [2021-06-12 20:17:16,256 INFO L226 Difference]: Without dead ends: 2512 [2021-06-12 20:17:16,257 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 6119.4ms TimeCoverageRelationStatistics Valid=715, Invalid=6091, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 20:17:16,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-06-12 20:17:16,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 1296. [2021-06-12 20:17:16,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.4308880308880307) internal successors, (4443), 1295 states have internal predecessors, (4443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:16,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 4443 transitions. [2021-06-12 20:17:16,282 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 4443 transitions. Word has length 23 [2021-06-12 20:17:16,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:17:16,282 INFO L482 AbstractCegarLoop]: Abstraction has 1296 states and 4443 transitions. [2021-06-12 20:17:16,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:16,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 4443 transitions. [2021-06-12 20:17:16,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:17:16,284 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:17:16,284 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:17:16,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5275 [2021-06-12 20:17:16,508 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:17:16,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:17:16,509 INFO L82 PathProgramCache]: Analyzing trace with hash -88296408, now seen corresponding path program 249 times [2021-06-12 20:17:16,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:17:16,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888558265] [2021-06-12 20:17:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:17:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:17:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:17:16,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:17:16,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888558265] [2021-06-12 20:17:16,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888558265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:16,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055278278] [2021-06-12 20:17:16,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:16,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:17:16,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:17:16,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 20:17:16,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:17:17,361 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-12 20:17:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:17:17,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055278278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:17,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:17:17,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-12 20:17:17,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859008815] [2021-06-12 20:17:17,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:17:17,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:17:17,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:17:17,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:17:17,707 INFO L87 Difference]: Start difference. First operand 1296 states and 4443 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:19,540 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-12 20:17:19,877 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-12 20:17:20,025 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-12 20:17:20,430 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-06-12 20:17:20,593 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-12 20:17:21,206 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-12 20:17:21,340 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-06-12 20:17:21,524 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-06-12 20:17:21,721 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-06-12 20:17:21,858 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-12 20:17:21,993 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-06-12 20:17:22,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:17:22,210 INFO L93 Difference]: Finished difference Result 2273 states and 7227 transitions. [2021-06-12 20:17:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 20:17:22,211 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:17:22,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:17:22,214 INFO L225 Difference]: With dead ends: 2273 [2021-06-12 20:17:22,215 INFO L226 Difference]: Without dead ends: 2091 [2021-06-12 20:17:22,215 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 4340.2ms TimeCoverageRelationStatistics Valid=409, Invalid=3131, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:17:22,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-12 20:17:22,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1342. [2021-06-12 20:17:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 3.41834451901566) internal successors, (4584), 1341 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 4584 transitions. [2021-06-12 20:17:22,238 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 4584 transitions. Word has length 23 [2021-06-12 20:17:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:17:22,238 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 4584 transitions. [2021-06-12 20:17:22,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:22,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 4584 transitions. [2021-06-12 20:17:22,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:17:22,240 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:17:22,240 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:17:22,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5295 [2021-06-12 20:17:22,454 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:17:22,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:17:22,454 INFO L82 PathProgramCache]: Analyzing trace with hash 2075591694, now seen corresponding path program 250 times [2021-06-12 20:17:22,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:17:22,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629838450] [2021-06-12 20:17:22,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:17:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:17:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:17:22,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:17:22,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629838450] [2021-06-12 20:17:22,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629838450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:22,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794815924] [2021-06-12 20:17:22,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:22,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:17:22,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:17:22,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:17:22,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:17:22,804 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:17:22,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:22,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:22,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:22,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:22,812 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:22,867 INFO L628 ElimStorePlain]: treesize reduction 32, result has 67.7 percent of original size [2021-06-12 20:17:22,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:22,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:22,907 INFO L628 ElimStorePlain]: treesize reduction 22, result has 65.6 percent of original size [2021-06-12 20:17:22,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:17:22,909 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:35 [2021-06-12 20:17:23,239 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_187, ends_with_10, v_prenex_186, v_prenex_185], 1=[ends_with_2]} [2021-06-12 20:17:23,243 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:17:23,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:23,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:23,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:23,392 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-06-12 20:17:23,392 INFO L628 ElimStorePlain]: treesize reduction 66, result has 65.8 percent of original size [2021-06-12 20:17:23,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:23,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:23,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:23,401 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:23,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:17:23,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:23,471 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:23,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:23,476 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:23,597 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-06-12 20:17:23,598 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.1 percent of original size [2021-06-12 20:17:23,598 INFO L518 ElimStorePlain]: Eliminatee v_prenex_185 vanished before elimination [2021-06-12 20:17:23,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:23,603 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:23,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:23,607 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:23,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:23,611 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:23,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:23,615 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:23,699 INFO L628 ElimStorePlain]: treesize reduction 22, result has 77.3 percent of original size [2021-06-12 20:17:23,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 5 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:17:23,701 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 7 variables, input treesize:229, output treesize:45 [2021-06-12 20:17:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:17:23,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794815924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:23,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:17:23,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:17:23,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061115558] [2021-06-12 20:17:23,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:17:23,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:17:23,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:17:23,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:17:23,770 INFO L87 Difference]: Start difference. First operand 1342 states and 4584 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:24,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:17:24,142 INFO L93 Difference]: Finished difference Result 1665 states and 5536 transitions. [2021-06-12 20:17:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:17:24,142 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:17:24,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:17:24,144 INFO L225 Difference]: With dead ends: 1665 [2021-06-12 20:17:24,144 INFO L226 Difference]: Without dead ends: 1620 [2021-06-12 20:17:24,144 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 477.8ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:17:24,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-06-12 20:17:24,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1277. [2021-06-12 20:17:24,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 1276 states have (on average 3.4130094043887147) internal successors, (4355), 1276 states have internal predecessors, (4355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:24,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 4355 transitions. [2021-06-12 20:17:24,160 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 4355 transitions. Word has length 23 [2021-06-12 20:17:24,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:17:24,160 INFO L482 AbstractCegarLoop]: Abstraction has 1277 states and 4355 transitions. [2021-06-12 20:17:24,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:24,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 4355 transitions. [2021-06-12 20:17:24,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:17:24,162 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:17:24,162 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:17:24,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5320 [2021-06-12 20:17:24,368 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:17:24,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:17:24,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1184269814, now seen corresponding path program 251 times [2021-06-12 20:17:24,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:17:24,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942126561] [2021-06-12 20:17:24,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:17:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:17:24,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:17:24,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:17:24,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942126561] [2021-06-12 20:17:24,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942126561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:24,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497896629] [2021-06-12 20:17:24,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:24,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:17:24,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:17:24,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:17:24,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:17:24,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:24,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:24,976 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.1 percent of original size [2021-06-12 20:17:24,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:24,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:24,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:24,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:25,039 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.2 percent of original size [2021-06-12 20:17:25,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:17:25,041 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:107, output treesize:57 [2021-06-12 20:17:25,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:25,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:25,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:17:25,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:25,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:25,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:25,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:17:25,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:25,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:25,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:25,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:17:25,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:25,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:25,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:25,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:17:25,361 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:25,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:25,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:17:25,364 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:25,420 INFO L628 ElimStorePlain]: treesize reduction 45, result has 55.9 percent of original size [2021-06-12 20:17:25,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:17:25,421 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:178, output treesize:41 [2021-06-12 20:17:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:17:25,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497896629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:25,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:17:25,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 20:17:25,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30945722] [2021-06-12 20:17:25,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:17:25,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:17:25,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:17:25,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:17:25,502 INFO L87 Difference]: Start difference. First operand 1277 states and 4355 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:25,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:17:25,898 INFO L93 Difference]: Finished difference Result 1650 states and 5508 transitions. [2021-06-12 20:17:25,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:17:25,899 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:17:25,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:17:25,901 INFO L225 Difference]: With dead ends: 1650 [2021-06-12 20:17:25,901 INFO L226 Difference]: Without dead ends: 1596 [2021-06-12 20:17:25,901 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 477.1ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:17:25,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-06-12 20:17:25,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1256. [2021-06-12 20:17:25,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 3.4087649402390436) internal successors, (4278), 1255 states have internal predecessors, (4278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:25,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 4278 transitions. [2021-06-12 20:17:25,917 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 4278 transitions. Word has length 23 [2021-06-12 20:17:25,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:17:25,917 INFO L482 AbstractCegarLoop]: Abstraction has 1256 states and 4278 transitions. [2021-06-12 20:17:25,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:25,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 4278 transitions. [2021-06-12 20:17:25,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:17:25,918 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:17:25,918 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:17:26,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5367,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:26,119 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:17:26,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:17:26,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2108940534, now seen corresponding path program 252 times [2021-06-12 20:17:26,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:17:26,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143510472] [2021-06-12 20:17:26,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:17:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:17:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:17:26,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:17:26,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143510472] [2021-06-12 20:17:26,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143510472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:26,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167998586] [2021-06-12 20:17:26,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:26,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:17:26,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:17:26,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:17:26,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:17:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:17:26,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167998586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:26,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:17:26,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-12 20:17:26,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513338434] [2021-06-12 20:17:26,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:17:26,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:17:26,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:17:26,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:17:26,703 INFO L87 Difference]: Start difference. First operand 1256 states and 4278 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:27,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:17:27,784 INFO L93 Difference]: Finished difference Result 1604 states and 5367 transitions. [2021-06-12 20:17:27,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:17:27,784 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:17:27,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:17:27,787 INFO L225 Difference]: With dead ends: 1604 [2021-06-12 20:17:27,787 INFO L226 Difference]: Without dead ends: 1538 [2021-06-12 20:17:27,787 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 990.7ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:17:27,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-06-12 20:17:27,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1259. [2021-06-12 20:17:27,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 3.4054054054054053) internal successors, (4284), 1258 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 4284 transitions. [2021-06-12 20:17:27,810 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 4284 transitions. Word has length 23 [2021-06-12 20:17:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:17:27,810 INFO L482 AbstractCegarLoop]: Abstraction has 1259 states and 4284 transitions. [2021-06-12 20:17:27,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:27,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 4284 transitions. [2021-06-12 20:17:27,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:17:27,811 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:17:27,811 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:17:28,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5453,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:28,012 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:17:28,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:17:28,012 INFO L82 PathProgramCache]: Analyzing trace with hash -930834746, now seen corresponding path program 253 times [2021-06-12 20:17:28,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:17:28,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652360099] [2021-06-12 20:17:28,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:17:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:17:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:17:28,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:17:28,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652360099] [2021-06-12 20:17:28,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652360099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:28,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446446260] [2021-06-12 20:17:28,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:17:28,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:17:28,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:17:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:17:28,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446446260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:28,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:17:28,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-12 20:17:28,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377638079] [2021-06-12 20:17:28,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:17:28,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:17:28,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:17:28,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:17:28,664 INFO L87 Difference]: Start difference. First operand 1259 states and 4284 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:29,153 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-12 20:17:31,361 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-12 20:17:32,012 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-12 20:17:32,296 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-06-12 20:17:33,140 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-06-12 20:17:33,282 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-06-12 20:17:33,526 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-06-12 20:17:33,859 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-12 20:17:34,354 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-12 20:17:34,539 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-12 20:17:34,718 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-06-12 20:17:34,925 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-12 20:17:35,163 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-12 20:17:35,343 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-12 20:17:35,578 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-12 20:17:35,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:17:35,741 INFO L93 Difference]: Finished difference Result 2846 states and 8745 transitions. [2021-06-12 20:17:35,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 20:17:35,742 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:17:35,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:17:35,745 INFO L225 Difference]: With dead ends: 2846 [2021-06-12 20:17:35,745 INFO L226 Difference]: Without dead ends: 2537 [2021-06-12 20:17:35,746 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2567 ImplicationChecksByTransitivity, 6188.3ms TimeCoverageRelationStatistics Valid=913, Invalid=7097, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 20:17:35,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-06-12 20:17:35,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1324. [2021-06-12 20:17:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.4640967498110355) internal successors, (4583), 1323 states have internal predecessors, (4583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 4583 transitions. [2021-06-12 20:17:35,767 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 4583 transitions. Word has length 23 [2021-06-12 20:17:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:17:35,767 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 4583 transitions. [2021-06-12 20:17:35,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 4583 transitions. [2021-06-12 20:17:35,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:17:35,769 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:17:35,769 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:17:35,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5464 [2021-06-12 20:17:35,969 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:17:35,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:17:35,970 INFO L82 PathProgramCache]: Analyzing trace with hash 359706776, now seen corresponding path program 254 times [2021-06-12 20:17:35,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:17:35,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324045211] [2021-06-12 20:17:35,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:17:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:17:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:17:36,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:17:36,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324045211] [2021-06-12 20:17:36,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324045211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:36,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166227507] [2021-06-12 20:17:36,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:36,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:17:36,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:17:36,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:17:36,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:17:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:17:36,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166227507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:36,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:17:36,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 20:17:36,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977179173] [2021-06-12 20:17:36,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:17:36,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:17:36,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:17:36,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:17:36,642 INFO L87 Difference]: Start difference. First operand 1324 states and 4583 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:39,033 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-06-12 20:17:40,345 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-06-12 20:17:41,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:17:41,473 INFO L93 Difference]: Finished difference Result 2176 states and 7003 transitions. [2021-06-12 20:17:41,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-12 20:17:41,474 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:17:41,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:17:41,477 INFO L225 Difference]: With dead ends: 2176 [2021-06-12 20:17:41,477 INFO L226 Difference]: Without dead ends: 2029 [2021-06-12 20:17:41,477 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 4115.5ms TimeCoverageRelationStatistics Valid=597, Invalid=5723, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 20:17:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-06-12 20:17:41,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1362. [2021-06-12 20:17:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 3.476855253490081) internal successors, (4732), 1361 states have internal predecessors, (4732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 4732 transitions. [2021-06-12 20:17:41,495 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 4732 transitions. Word has length 23 [2021-06-12 20:17:41,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:17:41,495 INFO L482 AbstractCegarLoop]: Abstraction has 1362 states and 4732 transitions. [2021-06-12 20:17:41,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 4732 transitions. [2021-06-12 20:17:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:17:41,496 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:17:41,496 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:17:41,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5476,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:41,697 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:17:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:17:41,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1320997318, now seen corresponding path program 255 times [2021-06-12 20:17:41,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:17:41,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145000182] [2021-06-12 20:17:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:17:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:17:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:17:41,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:17:41,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145000182] [2021-06-12 20:17:41,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145000182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:41,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145894114] [2021-06-12 20:17:41,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:42,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:17:42,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:17:42,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:17:42,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:17:42,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:42,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:42,431 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.1 percent of original size [2021-06-12 20:17:42,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:42,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:42,503 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.6 percent of original size [2021-06-12 20:17:42,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:42,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:42,570 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.6 percent of original size [2021-06-12 20:17:42,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:17:42,573 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:107, output treesize:57 [2021-06-12 20:17:42,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:42,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:42,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:17:42,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:42,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:42,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:42,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:17:42,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:42,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:42,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:42,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:17:42,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:42,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:17:42,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:17:42,867 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:42,928 INFO L628 ElimStorePlain]: treesize reduction 26, result has 68.7 percent of original size [2021-06-12 20:17:42,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:17:42,929 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:151, output treesize:41 [2021-06-12 20:17:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:17:43,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145894114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:43,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:17:43,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:17:43,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173954116] [2021-06-12 20:17:43,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:17:43,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:17:43,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:17:43,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:17:43,023 INFO L87 Difference]: Start difference. First operand 1362 states and 4732 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:43,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:17:43,560 INFO L93 Difference]: Finished difference Result 1860 states and 6275 transitions. [2021-06-12 20:17:43,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:17:43,560 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:17:43,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:17:43,563 INFO L225 Difference]: With dead ends: 1860 [2021-06-12 20:17:43,563 INFO L226 Difference]: Without dead ends: 1806 [2021-06-12 20:17:43,563 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 794.4ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:17:43,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-06-12 20:17:43,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1380. [2021-06-12 20:17:43,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.4851341551849164) internal successors, (4806), 1379 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4806 transitions. [2021-06-12 20:17:43,585 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4806 transitions. Word has length 23 [2021-06-12 20:17:43,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:17:43,585 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4806 transitions. [2021-06-12 20:17:43,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:43,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4806 transitions. [2021-06-12 20:17:43,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:17:43,587 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:17:43,587 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:17:43,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5492 [2021-06-12 20:17:43,810 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:17:43,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:17:43,811 INFO L82 PathProgramCache]: Analyzing trace with hash 148239946, now seen corresponding path program 256 times [2021-06-12 20:17:43,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:17:43,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406336249] [2021-06-12 20:17:43,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:17:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:17:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:17:44,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:17:44,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406336249] [2021-06-12 20:17:44,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406336249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:44,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363244501] [2021-06-12 20:17:44,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:44,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:17:44,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:17:44,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:17:44,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:17:44,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:44,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:44,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:17:44,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:44,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:44,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:44,400 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-06-12 20:17:44,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:44,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:44,441 INFO L628 ElimStorePlain]: treesize reduction 20, result has 65.5 percent of original size [2021-06-12 20:17:44,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:17:44,443 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:127, output treesize:33 [2021-06-12 20:17:44,896 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_10, v_prenex_194], 1=[ends_with_2]} [2021-06-12 20:17:44,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:44,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:44,905 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:17:44,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:45,099 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-12 20:17:45,099 INFO L628 ElimStorePlain]: treesize reduction 49, result has 78.1 percent of original size [2021-06-12 20:17:45,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:45,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:45,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:45,109 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:45,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:45,114 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:45,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:45,119 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:45,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:45,124 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:45,296 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-06-12 20:17:45,297 INFO L628 ElimStorePlain]: treesize reduction 26, result has 83.4 percent of original size [2021-06-12 20:17:45,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:45,302 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:45,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:45,306 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:45,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:45,311 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:45,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:45,316 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:45,415 INFO L628 ElimStorePlain]: treesize reduction 25, result has 78.4 percent of original size [2021-06-12 20:17:45,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:17:45,418 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:261, output treesize:57 [2021-06-12 20:17:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:17:45,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363244501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:45,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:17:45,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-12 20:17:45,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946066704] [2021-06-12 20:17:45,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:17:45,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:17:45,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:17:45,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:17:45,556 INFO L87 Difference]: Start difference. First operand 1380 states and 4806 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:47,357 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-06-12 20:17:47,506 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-06-12 20:17:47,656 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-06-12 20:17:47,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:17:47,676 INFO L93 Difference]: Finished difference Result 1752 states and 5922 transitions. [2021-06-12 20:17:47,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:17:47,676 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:17:47,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:17:47,680 INFO L225 Difference]: With dead ends: 1752 [2021-06-12 20:17:47,680 INFO L226 Difference]: Without dead ends: 1650 [2021-06-12 20:17:47,680 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1948.6ms TimeCoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:17:47,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-06-12 20:17:47,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1350. [2021-06-12 20:17:47,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 3.467753891771683) internal successors, (4678), 1349 states have internal predecessors, (4678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:47,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 4678 transitions. [2021-06-12 20:17:47,702 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 4678 transitions. Word has length 23 [2021-06-12 20:17:47,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:17:47,702 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 4678 transitions. [2021-06-12 20:17:47,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:47,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 4678 transitions. [2021-06-12 20:17:47,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:17:47,704 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:17:47,704 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:17:47,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5537,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:47,928 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:17:47,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:17:47,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1096509210, now seen corresponding path program 257 times [2021-06-12 20:17:47,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:17:47,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780574474] [2021-06-12 20:17:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:17:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:17:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:17:48,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:17:48,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780574474] [2021-06-12 20:17:48,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780574474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:48,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574200611] [2021-06-12 20:17:48,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:48,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:17:48,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:17:48,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:17:48,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:17:48,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:48,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:48,450 INFO L628 ElimStorePlain]: treesize reduction 48, result has 64.7 percent of original size [2021-06-12 20:17:48,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:48,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:48,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:17:48,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:48,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:48,553 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-06-12 20:17:48,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:48,557 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:48,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:17:48,583 INFO L518 ElimStorePlain]: Eliminatee v_prenex_196 vanished before elimination [2021-06-12 20:17:48,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:17:48,584 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:139, output treesize:58 [2021-06-12 20:17:49,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:49,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:49,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:49,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:49,251 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2021-06-12 20:17:49,251 INFO L628 ElimStorePlain]: treesize reduction 169, result has 46.3 percent of original size [2021-06-12 20:17:49,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:49,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:49,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:49,260 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:49,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:49,264 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:49,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:49,269 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:49,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:49,273 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:49,386 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 30 [2021-06-12 20:17:49,387 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-12 20:17:49,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:49,391 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:49,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:49,395 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:49,461 INFO L628 ElimStorePlain]: treesize reduction 51, result has 56.8 percent of original size [2021-06-12 20:17:49,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:17:49,463 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:321, output treesize:55 [2021-06-12 20:17:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:17:49,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574200611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:49,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:17:49,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-12 20:17:49,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902052629] [2021-06-12 20:17:49,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:17:49,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:17:49,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:17:49,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:17:49,730 INFO L87 Difference]: Start difference. First operand 1350 states and 4678 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:51,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:17:51,513 INFO L93 Difference]: Finished difference Result 1969 states and 6573 transitions. [2021-06-12 20:17:51,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:17:51,513 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:17:51,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:17:51,516 INFO L225 Difference]: With dead ends: 1969 [2021-06-12 20:17:51,516 INFO L226 Difference]: Without dead ends: 1918 [2021-06-12 20:17:51,517 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1418.8ms TimeCoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:17:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-06-12 20:17:51,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1339. [2021-06-12 20:17:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 3.4715994020926755) internal successors, (4645), 1338 states have internal predecessors, (4645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 4645 transitions. [2021-06-12 20:17:51,538 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 4645 transitions. Word has length 23 [2021-06-12 20:17:51,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:17:51,538 INFO L482 AbstractCegarLoop]: Abstraction has 1339 states and 4645 transitions. [2021-06-12 20:17:51,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:51,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 4645 transitions. [2021-06-12 20:17:51,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:17:51,540 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:17:51,540 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:17:51,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5640 [2021-06-12 20:17:51,753 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:17:51,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:17:51,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1328644520, now seen corresponding path program 258 times [2021-06-12 20:17:51,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:17:51,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286286028] [2021-06-12 20:17:51,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:17:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:17:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:17:51,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:17:51,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286286028] [2021-06-12 20:17:51,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286286028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:51,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301986454] [2021-06-12 20:17:51,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:52,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:17:52,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:17:52,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:17:52,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:17:52,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-12 20:17:52,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:52,257 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.3 percent of original size [2021-06-12 20:17:52,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:17:52,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:52,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-12 20:17:52,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:52,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:17:52,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:52,324 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-12 20:17:52,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:17:52,329 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:111, output treesize:62 [2021-06-12 20:17:52,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:52,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:52,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:17:52,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:52,669 INFO L628 ElimStorePlain]: treesize reduction 92, result has 47.1 percent of original size [2021-06-12 20:17:52,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:52,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:52,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:52,683 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:52,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:52,687 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:52,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:17:52,724 INFO L518 ElimStorePlain]: Eliminatee v_prenex_202 vanished before elimination [2021-06-12 20:17:52,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:52,728 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:52,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:52,732 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:52,795 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.4 percent of original size [2021-06-12 20:17:52,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:17:52,796 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 5 variables, input treesize:204, output treesize:51 [2021-06-12 20:17:52,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:17:52,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301986454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:52,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:17:52,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-06-12 20:17:52,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294427041] [2021-06-12 20:17:52,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:17:52,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:17:52,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:17:52,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:17:52,909 INFO L87 Difference]: Start difference. First operand 1339 states and 4645 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:54,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:17:54,370 INFO L93 Difference]: Finished difference Result 1855 states and 6186 transitions. [2021-06-12 20:17:54,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:17:54,370 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:17:54,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:17:54,374 INFO L225 Difference]: With dead ends: 1855 [2021-06-12 20:17:54,374 INFO L226 Difference]: Without dead ends: 1804 [2021-06-12 20:17:54,374 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1332.4ms TimeCoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:17:54,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2021-06-12 20:17:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1356. [2021-06-12 20:17:54,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 3.482656826568266) internal successors, (4719), 1355 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 4719 transitions. [2021-06-12 20:17:54,396 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 4719 transitions. Word has length 23 [2021-06-12 20:17:54,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:17:54,396 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 4719 transitions. [2021-06-12 20:17:54,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 4719 transitions. [2021-06-12 20:17:54,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:17:54,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:17:54,398 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:17:54,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5683,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:54,621 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:17:54,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:17:54,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1065013066, now seen corresponding path program 259 times [2021-06-12 20:17:54,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:17:54,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924685917] [2021-06-12 20:17:54,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:17:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:17:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:17:54,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:17:54,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924685917] [2021-06-12 20:17:54,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924685917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:54,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459966364] [2021-06-12 20:17:54,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:17:54,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:17:54,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:17:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:17:55,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459966364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:55,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:17:55,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 20:17:55,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050633785] [2021-06-12 20:17:55,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:17:55,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:17:55,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:17:55,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:17:55,196 INFO L87 Difference]: Start difference. First operand 1356 states and 4719 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:59,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:17:59,233 INFO L93 Difference]: Finished difference Result 2432 states and 7719 transitions. [2021-06-12 20:17:59,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 20:17:59,233 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:17:59,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:17:59,237 INFO L225 Difference]: With dead ends: 2432 [2021-06-12 20:17:59,237 INFO L226 Difference]: Without dead ends: 2270 [2021-06-12 20:17:59,237 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 3432.9ms TimeCoverageRelationStatistics Valid=606, Invalid=5556, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 20:17:59,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-06-12 20:17:59,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1375. [2021-06-12 20:17:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 3.4963609898107713) internal successors, (4804), 1374 states have internal predecessors, (4804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:59,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 4804 transitions. [2021-06-12 20:17:59,256 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 4804 transitions. Word has length 23 [2021-06-12 20:17:59,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:17:59,256 INFO L482 AbstractCegarLoop]: Abstraction has 1375 states and 4804 transitions. [2021-06-12 20:17:59,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:17:59,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 4804 transitions. [2021-06-12 20:17:59,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:17:59,258 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:17:59,258 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:17:59,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5721,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:59,466 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:17:59,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:17:59,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1756904426, now seen corresponding path program 260 times [2021-06-12 20:17:59,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:17:59,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599286353] [2021-06-12 20:17:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:17:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:17:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:17:59,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:17:59,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599286353] [2021-06-12 20:17:59,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599286353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:17:59,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574399603] [2021-06-12 20:17:59,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:17:59,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:17:59,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:17:59,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:17:59,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:17:59,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:59,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:59,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:17:59,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:59,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:59,930 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:17:59,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:17:59,942 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:00,001 INFO L628 ElimStorePlain]: treesize reduction 52, result has 57.4 percent of original size [2021-06-12 20:18:00,001 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-12 20:18:00,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-12 20:18:00,004 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:70 [2021-06-12 20:18:00,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:00,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:00,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:18:00,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:00,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:18:00,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:00,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:00,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:00,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:18:00,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:00,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:00,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:18:00,325 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:00,387 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.4 percent of original size [2021-06-12 20:18:00,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:00,390 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:00,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:00,393 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:00,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:18:00,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:18:00,418 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:207, output treesize:33 [2021-06-12 20:18:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:18:00,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574399603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:00,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:00,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-12 20:18:00,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588618078] [2021-06-12 20:18:00,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:18:00,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:00,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:18:00,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:18:00,492 INFO L87 Difference]: Start difference. First operand 1375 states and 4804 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:02,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:02,280 INFO L93 Difference]: Finished difference Result 1790 states and 5946 transitions. [2021-06-12 20:18:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:18:02,280 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:18:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:02,283 INFO L225 Difference]: With dead ends: 1790 [2021-06-12 20:18:02,283 INFO L226 Difference]: Without dead ends: 1730 [2021-06-12 20:18:02,283 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1350.8ms TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:18:02,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-06-12 20:18:02,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1351. [2021-06-12 20:18:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1351 states, 1350 states have (on average 3.4955555555555557) internal successors, (4719), 1350 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:02,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1351 states to 1351 states and 4719 transitions. [2021-06-12 20:18:02,299 INFO L78 Accepts]: Start accepts. Automaton has 1351 states and 4719 transitions. Word has length 23 [2021-06-12 20:18:02,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:02,299 INFO L482 AbstractCegarLoop]: Abstraction has 1351 states and 4719 transitions. [2021-06-12 20:18:02,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:02,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1351 states and 4719 transitions. [2021-06-12 20:18:02,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:18:02,301 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:02,301 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:02,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5736,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:02,501 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:02,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:02,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1028994524, now seen corresponding path program 261 times [2021-06-12 20:18:02,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:02,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537151518] [2021-06-12 20:18:02,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:02,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:02,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537151518] [2021-06-12 20:18:02,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537151518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:02,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979252522] [2021-06-12 20:18:02,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:02,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:18:02,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:02,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:18:02,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:18:03,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979252522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:03,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:03,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-12 20:18:03,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565517667] [2021-06-12 20:18:03,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:18:03,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:03,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:18:03,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:18:03,107 INFO L87 Difference]: Start difference. First operand 1351 states and 4719 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:04,998 INFO L93 Difference]: Finished difference Result 1756 states and 5813 transitions. [2021-06-12 20:18:04,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:18:04,998 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:18:04,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:05,001 INFO L225 Difference]: With dead ends: 1756 [2021-06-12 20:18:05,001 INFO L226 Difference]: Without dead ends: 1680 [2021-06-12 20:18:05,001 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 1397.8ms TimeCoverageRelationStatistics Valid=208, Invalid=1862, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:18:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2021-06-12 20:18:05,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1318. [2021-06-12 20:18:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.4738041002277904) internal successors, (4575), 1317 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:05,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4575 transitions. [2021-06-12 20:18:05,016 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4575 transitions. Word has length 23 [2021-06-12 20:18:05,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:05,016 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 4575 transitions. [2021-06-12 20:18:05,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:05,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4575 transitions. [2021-06-12 20:18:05,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:18:05,017 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:05,017 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:05,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5818 [2021-06-12 20:18:05,218 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:05,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:05,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1103912864, now seen corresponding path program 262 times [2021-06-12 20:18:05,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:05,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784631445] [2021-06-12 20:18:05,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:05,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:05,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784631445] [2021-06-12 20:18:05,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784631445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:05,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697189859] [2021-06-12 20:18:05,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:05,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:18:05,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:05,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:18:05,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:05,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:05,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:05,752 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-06-12 20:18:05,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:05,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:05,815 INFO L628 ElimStorePlain]: treesize reduction 28, result has 71.7 percent of original size [2021-06-12 20:18:05,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:05,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:05,871 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.6 percent of original size [2021-06-12 20:18:05,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:18:05,873 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:107, output treesize:57 [2021-06-12 20:18:06,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:06,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:06,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:18:06,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:06,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:06,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:06,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:18:06,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:06,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:06,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:06,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:18:06,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:06,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:06,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:18:06,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:06,336 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-12 20:18:06,336 INFO L628 ElimStorePlain]: treesize reduction 99, result has 55.6 percent of original size [2021-06-12 20:18:06,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:06,340 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:06,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:06,343 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:06,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:18:06,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 20:18:06,399 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:301, output treesize:80 [2021-06-12 20:18:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:18:06,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697189859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:06,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:06,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 20:18:06,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249694489] [2021-06-12 20:18:06,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:18:06,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:06,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:18:06,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:18:06,557 INFO L87 Difference]: Start difference. First operand 1318 states and 4575 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:07,168 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-12 20:18:07,445 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-06-12 20:18:07,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:07,575 INFO L93 Difference]: Finished difference Result 1728 states and 5785 transitions. [2021-06-12 20:18:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:18:07,575 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:18:07,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:07,577 INFO L225 Difference]: With dead ends: 1728 [2021-06-12 20:18:07,577 INFO L226 Difference]: Without dead ends: 1674 [2021-06-12 20:18:07,577 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1264.2ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:18:07,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2021-06-12 20:18:07,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1307. [2021-06-12 20:18:07,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 3.4640122511485454) internal successors, (4524), 1306 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 4524 transitions. [2021-06-12 20:18:07,591 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 4524 transitions. Word has length 23 [2021-06-12 20:18:07,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:07,592 INFO L482 AbstractCegarLoop]: Abstraction has 1307 states and 4524 transitions. [2021-06-12 20:18:07,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:07,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 4524 transitions. [2021-06-12 20:18:07,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:18:07,593 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:07,593 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:07,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5836 [2021-06-12 20:18:07,793 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:07,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:07,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1968196404, now seen corresponding path program 263 times [2021-06-12 20:18:07,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:07,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979964434] [2021-06-12 20:18:07,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:08,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:08,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979964434] [2021-06-12 20:18:08,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979964434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:08,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999018737] [2021-06-12 20:18:08,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:08,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:18:08,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:08,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:18:08,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:18:08,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999018737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:08,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:08,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-12 20:18:08,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088448746] [2021-06-12 20:18:08,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:18:08,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:08,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:18:08,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:18:08,385 INFO L87 Difference]: Start difference. First operand 1307 states and 4524 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:10,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:10,023 INFO L93 Difference]: Finished difference Result 1893 states and 6259 transitions. [2021-06-12 20:18:10,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:18:10,024 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:18:10,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:10,026 INFO L225 Difference]: With dead ends: 1893 [2021-06-12 20:18:10,026 INFO L226 Difference]: Without dead ends: 1784 [2021-06-12 20:18:10,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1280.0ms TimeCoverageRelationStatistics Valid=275, Invalid=2275, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:18:10,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-12 20:18:10,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1302. [2021-06-12 20:18:10,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.458877786318217) internal successors, (4500), 1301 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4500 transitions. [2021-06-12 20:18:10,042 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4500 transitions. Word has length 23 [2021-06-12 20:18:10,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:10,042 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4500 transitions. [2021-06-12 20:18:10,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:10,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4500 transitions. [2021-06-12 20:18:10,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:18:10,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:10,043 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:10,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5893 [2021-06-12 20:18:10,244 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:10,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:10,244 INFO L82 PathProgramCache]: Analyzing trace with hash 109506426, now seen corresponding path program 264 times [2021-06-12 20:18:10,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:10,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611911861] [2021-06-12 20:18:10,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:18:10,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:10,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611911861] [2021-06-12 20:18:10,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611911861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:10,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472178828] [2021-06-12 20:18:10,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:10,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:18:10,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:10,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:18:10,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:18:10,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472178828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:10,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:10,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:18:10,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166433465] [2021-06-12 20:18:10,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:18:10,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:10,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:18:10,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:18:10,704 INFO L87 Difference]: Start difference. First operand 1302 states and 4500 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:13,961 INFO L93 Difference]: Finished difference Result 2376 states and 7653 transitions. [2021-06-12 20:18:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 20:18:13,962 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:18:13,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:13,964 INFO L225 Difference]: With dead ends: 2376 [2021-06-12 20:18:13,964 INFO L226 Difference]: Without dead ends: 2187 [2021-06-12 20:18:13,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 2664.8ms TimeCoverageRelationStatistics Valid=536, Invalid=4434, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 20:18:13,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-06-12 20:18:13,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1345. [2021-06-12 20:18:13,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.486607142857143) internal successors, (4686), 1344 states have internal predecessors, (4686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4686 transitions. [2021-06-12 20:18:13,982 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4686 transitions. Word has length 23 [2021-06-12 20:18:13,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:13,982 INFO L482 AbstractCegarLoop]: Abstraction has 1345 states and 4686 transitions. [2021-06-12 20:18:13,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:13,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4686 transitions. [2021-06-12 20:18:13,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:18:13,983 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:13,983 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:14,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5911 [2021-06-12 20:18:14,184 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:14,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:14,184 INFO L82 PathProgramCache]: Analyzing trace with hash 2135427910, now seen corresponding path program 265 times [2021-06-12 20:18:14,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:14,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881166042] [2021-06-12 20:18:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:18:14,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:14,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881166042] [2021-06-12 20:18:14,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881166042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:14,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592591883] [2021-06-12 20:18:14,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:14,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:18:14,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:18:14,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592591883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:14,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:14,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 20:18:14,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292475100] [2021-06-12 20:18:14,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:18:14,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:14,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:18:14,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:18:14,602 INFO L87 Difference]: Start difference. First operand 1345 states and 4686 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:16,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:16,912 INFO L93 Difference]: Finished difference Result 2059 states and 6741 transitions. [2021-06-12 20:18:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 20:18:16,912 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:18:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:16,915 INFO L225 Difference]: With dead ends: 2059 [2021-06-12 20:18:16,915 INFO L226 Difference]: Without dead ends: 1899 [2021-06-12 20:18:16,915 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 1854.6ms TimeCoverageRelationStatistics Valid=410, Invalid=3130, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:18:16,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-06-12 20:18:16,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1275. [2021-06-12 20:18:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1274 states have (on average 3.4505494505494507) internal successors, (4396), 1274 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 4396 transitions. [2021-06-12 20:18:16,930 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 4396 transitions. Word has length 23 [2021-06-12 20:18:16,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:16,930 INFO L482 AbstractCegarLoop]: Abstraction has 1275 states and 4396 transitions. [2021-06-12 20:18:16,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:16,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 4396 transitions. [2021-06-12 20:18:16,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:18:16,931 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:16,931 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:17,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5930,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:17,132 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:17,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:17,132 INFO L82 PathProgramCache]: Analyzing trace with hash -2009463328, now seen corresponding path program 266 times [2021-06-12 20:18:17,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:17,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253892348] [2021-06-12 20:18:17,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:17,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:17,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:17,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253892348] [2021-06-12 20:18:17,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253892348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:17,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999038475] [2021-06-12 20:18:17,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:17,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:18:17,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:17,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:18:17,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:17,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:17,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:17,734 INFO L628 ElimStorePlain]: treesize reduction 34, result has 74.6 percent of original size [2021-06-12 20:18:17,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:17,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:17,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:17,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:17,798 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.1 percent of original size [2021-06-12 20:18:17,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:17,802 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:17,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:18:17,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:18:17,831 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:62 [2021-06-12 20:18:18,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:18,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:18,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:18:18,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:18,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:18,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:18,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:18:18,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:18,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:18,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:18,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:18:18,063 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:18,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:18:18,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-06-12 20:18:18,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:18,108 INFO L628 ElimStorePlain]: treesize reduction 45, result has 46.4 percent of original size [2021-06-12 20:18:18,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:18:18,109 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:145, output treesize:33 [2021-06-12 20:18:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:18:18,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999038475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:18,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:18,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-12 20:18:18,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698948010] [2021-06-12 20:18:18,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:18:18,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:18,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:18:18,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:18:18,182 INFO L87 Difference]: Start difference. First operand 1275 states and 4396 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:20,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:20,729 INFO L93 Difference]: Finished difference Result 1896 states and 6139 transitions. [2021-06-12 20:18:20,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:18:20,729 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:18:20,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:20,732 INFO L225 Difference]: With dead ends: 1896 [2021-06-12 20:18:20,732 INFO L226 Difference]: Without dead ends: 1788 [2021-06-12 20:18:20,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 2145.1ms TimeCoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:18:20,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2021-06-12 20:18:20,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1253. [2021-06-12 20:18:20,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 3.4544728434504792) internal successors, (4325), 1252 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:20,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 4325 transitions. [2021-06-12 20:18:20,747 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 4325 transitions. Word has length 23 [2021-06-12 20:18:20,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:20,748 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 4325 transitions. [2021-06-12 20:18:20,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 4325 transitions. [2021-06-12 20:18:20,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:18:20,749 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:20,749 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:20,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5944,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:20,950 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:20,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:20,950 INFO L82 PathProgramCache]: Analyzing trace with hash 995054606, now seen corresponding path program 267 times [2021-06-12 20:18:20,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:20,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420492433] [2021-06-12 20:18:20,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:21,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:21,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420492433] [2021-06-12 20:18:21,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420492433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:21,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338706080] [2021-06-12 20:18:21,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:21,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:18:21,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:21,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:18:21,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:21,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:21,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:21,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:18:21,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:18:21,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-06-12 20:18:21,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:21,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:21,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:21,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:21,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:21,335 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:21,383 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-12 20:18:21,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:21,386 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:21,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:21,389 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:21,415 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-12 20:18:21,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:18:21,417 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-12 20:18:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:18:21,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338706080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:21,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:21,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18 [2021-06-12 20:18:21,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153377758] [2021-06-12 20:18:21,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:18:21,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:21,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:18:21,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:18:21,456 INFO L87 Difference]: Start difference. First operand 1253 states and 4325 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:22,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:22,834 INFO L93 Difference]: Finished difference Result 1836 states and 5986 transitions. [2021-06-12 20:18:22,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:18:22,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:18:22,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:22,837 INFO L225 Difference]: With dead ends: 1836 [2021-06-12 20:18:22,837 INFO L226 Difference]: Without dead ends: 1742 [2021-06-12 20:18:22,837 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1127.2ms TimeCoverageRelationStatistics Valid=448, Invalid=2102, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:18:22,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2021-06-12 20:18:22,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1236. [2021-06-12 20:18:22,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.473684210526316) internal successors, (4290), 1235 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 4290 transitions. [2021-06-12 20:18:22,852 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 4290 transitions. Word has length 24 [2021-06-12 20:18:22,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:22,852 INFO L482 AbstractCegarLoop]: Abstraction has 1236 states and 4290 transitions. [2021-06-12 20:18:22,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:22,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 4290 transitions. [2021-06-12 20:18:22,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:18:22,853 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:22,853 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:23,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6002 [2021-06-12 20:18:23,054 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:23,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:23,054 INFO L82 PathProgramCache]: Analyzing trace with hash -402598, now seen corresponding path program 268 times [2021-06-12 20:18:23,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:23,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311055118] [2021-06-12 20:18:23,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:18:23,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:23,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311055118] [2021-06-12 20:18:23,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311055118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:23,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807027195] [2021-06-12 20:18:23,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:23,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:18:23,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:23,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:18:23,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:23,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:23,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:23,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:18:23,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:18:23,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-06-12 20:18:23,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:23,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:23,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:23,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:23,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:23,390 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:23,426 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-12 20:18:23,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:23,429 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:23,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:23,431 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:23,457 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-12 20:18:23,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:18:23,458 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-12 20:18:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:18:23,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807027195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:23,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:23,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2021-06-12 20:18:23,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734005080] [2021-06-12 20:18:23,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:18:23,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:23,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:18:23,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:18:23,494 INFO L87 Difference]: Start difference. First operand 1236 states and 4290 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:23,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:23,852 INFO L93 Difference]: Finished difference Result 1658 states and 5527 transitions. [2021-06-12 20:18:23,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:18:23,852 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:18:23,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:23,854 INFO L225 Difference]: With dead ends: 1658 [2021-06-12 20:18:23,854 INFO L226 Difference]: Without dead ends: 1599 [2021-06-12 20:18:23,854 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 333.7ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:18:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-06-12 20:18:23,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1258. [2021-06-12 20:18:23,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 3.484486873508353) internal successors, (4380), 1257 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 4380 transitions. [2021-06-12 20:18:23,868 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 4380 transitions. Word has length 24 [2021-06-12 20:18:23,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:23,868 INFO L482 AbstractCegarLoop]: Abstraction has 1258 states and 4380 transitions. [2021-06-12 20:18:23,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 4380 transitions. [2021-06-12 20:18:23,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:18:23,869 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:23,869 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:24,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6010,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:24,070 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:24,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:24,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2080068998, now seen corresponding path program 269 times [2021-06-12 20:18:24,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:24,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735489788] [2021-06-12 20:18:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:18:24,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:24,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735489788] [2021-06-12 20:18:24,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735489788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:24,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683839612] [2021-06-12 20:18:24,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:24,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:18:24,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:24,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:18:24,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:24,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:24,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:24,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:18:24,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:18:24,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-06-12 20:18:24,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:24,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:24,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:24,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:24,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:24,371 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:24,407 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-12 20:18:24,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:24,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:24,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:24,412 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:24,438 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-12 20:18:24,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:18:24,440 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-12 20:18:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:18:24,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683839612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:24,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:24,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-06-12 20:18:24,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960089219] [2021-06-12 20:18:24,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:18:24,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:24,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:18:24,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:18:24,512 INFO L87 Difference]: Start difference. First operand 1258 states and 4380 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:24,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:24,933 INFO L93 Difference]: Finished difference Result 1659 states and 5547 transitions. [2021-06-12 20:18:24,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:18:24,933 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:18:24,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:24,935 INFO L225 Difference]: With dead ends: 1659 [2021-06-12 20:18:24,935 INFO L226 Difference]: Without dead ends: 1600 [2021-06-12 20:18:24,936 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:18:24,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-12 20:18:24,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1283. [2021-06-12 20:18:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 3.49609984399376) internal successors, (4482), 1282 states have internal predecessors, (4482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4482 transitions. [2021-06-12 20:18:24,950 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4482 transitions. Word has length 24 [2021-06-12 20:18:24,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:24,950 INFO L482 AbstractCegarLoop]: Abstraction has 1283 states and 4482 transitions. [2021-06-12 20:18:24,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:24,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4482 transitions. [2021-06-12 20:18:24,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:18:24,952 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:24,952 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:25,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6019,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:25,152 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:25,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:25,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1039407654, now seen corresponding path program 270 times [2021-06-12 20:18:25,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:25,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158710994] [2021-06-12 20:18:25,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:25,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:25,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158710994] [2021-06-12 20:18:25,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158710994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:25,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436786762] [2021-06-12 20:18:25,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:25,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:18:25,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:25,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:18:25,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:25,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:25,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:25,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:18:25,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:18:25,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2021-06-12 20:18:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:18:25,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436786762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:25,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:25,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2021-06-12 20:18:25,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418508773] [2021-06-12 20:18:25,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:18:25,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:25,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:18:25,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:18:25,757 INFO L87 Difference]: Start difference. First operand 1283 states and 4482 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:26,312 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-12 20:18:27,998 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-06-12 20:18:28,547 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-06-12 20:18:28,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:28,886 INFO L93 Difference]: Finished difference Result 2239 states and 7277 transitions. [2021-06-12 20:18:28,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 20:18:28,887 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:18:28,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:28,891 INFO L225 Difference]: With dead ends: 2239 [2021-06-12 20:18:28,891 INFO L226 Difference]: Without dead ends: 2113 [2021-06-12 20:18:28,891 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2517.8ms TimeCoverageRelationStatistics Valid=491, Invalid=2931, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 20:18:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-06-12 20:18:28,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1282. [2021-06-12 20:18:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.501951600312256) internal successors, (4486), 1281 states have internal predecessors, (4486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:28,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4486 transitions. [2021-06-12 20:18:28,914 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4486 transitions. Word has length 24 [2021-06-12 20:18:28,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:28,914 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 4486 transitions. [2021-06-12 20:18:28,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:28,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4486 transitions. [2021-06-12 20:18:28,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:18:28,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:28,916 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:29,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6027,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:29,133 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:29,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:29,133 INFO L82 PathProgramCache]: Analyzing trace with hash -794804850, now seen corresponding path program 271 times [2021-06-12 20:18:29,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:29,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141511004] [2021-06-12 20:18:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:29,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:29,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141511004] [2021-06-12 20:18:29,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141511004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:29,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039292977] [2021-06-12 20:18:29,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:29,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:18:29,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:29,430 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:18:29,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:29,456 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-06-12 20:18:29,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:18:29,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:29,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:18:29,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:18:29,471 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:22 [2021-06-12 20:18:29,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:29,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:29,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:29,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:29,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:29,538 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:29,580 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-12 20:18:29,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:29,584 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:29,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:29,587 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:29,617 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-12 20:18:29,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:18:29,619 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-12 20:18:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:18:29,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039292977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:29,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:29,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:18:29,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081085503] [2021-06-12 20:18:29,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:18:29,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:29,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:18:29,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:18:29,673 INFO L87 Difference]: Start difference. First operand 1282 states and 4486 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:30,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:30,155 INFO L93 Difference]: Finished difference Result 1579 states and 5362 transitions. [2021-06-12 20:18:30,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:18:30,155 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:18:30,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:30,158 INFO L225 Difference]: With dead ends: 1579 [2021-06-12 20:18:30,158 INFO L226 Difference]: Without dead ends: 1528 [2021-06-12 20:18:30,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 441.7ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:18:30,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2021-06-12 20:18:30,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 1318. [2021-06-12 20:18:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1317 states have (on average 3.507972665148064) internal successors, (4620), 1317 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4620 transitions. [2021-06-12 20:18:30,176 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4620 transitions. Word has length 24 [2021-06-12 20:18:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:30,177 INFO L482 AbstractCegarLoop]: Abstraction has 1318 states and 4620 transitions. [2021-06-12 20:18:30,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4620 transitions. [2021-06-12 20:18:30,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:18:30,179 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:30,179 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:30,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6063 [2021-06-12 20:18:30,403 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:30,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:30,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1285666746, now seen corresponding path program 272 times [2021-06-12 20:18:30,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:30,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103046476] [2021-06-12 20:18:30,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:30,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:30,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103046476] [2021-06-12 20:18:30,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103046476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:30,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406281306] [2021-06-12 20:18:30,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:30,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:18:30,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:30,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:18:30,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:30,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:18:30,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:30,752 INFO L628 ElimStorePlain]: treesize reduction 2, result has 91.7 percent of original size [2021-06-12 20:18:30,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:18:30,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:22 [2021-06-12 20:18:30,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:30,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:30,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:30,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:30,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:30,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:30,891 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-12 20:18:30,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:30,894 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:30,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:30,897 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:30,927 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-12 20:18:30,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:18:30,928 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-12 20:18:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:18:31,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406281306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:31,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:31,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 20:18:31,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59881079] [2021-06-12 20:18:31,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:18:31,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:31,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:18:31,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:18:31,180 INFO L87 Difference]: Start difference. First operand 1318 states and 4620 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:31,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:31,630 INFO L93 Difference]: Finished difference Result 1678 states and 5684 transitions. [2021-06-12 20:18:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:18:31,631 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:18:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:31,635 INFO L225 Difference]: With dead ends: 1678 [2021-06-12 20:18:31,635 INFO L226 Difference]: Without dead ends: 1627 [2021-06-12 20:18:31,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 442.5ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:18:31,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-06-12 20:18:31,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1343. [2021-06-12 20:18:31,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 3.518628912071535) internal successors, (4722), 1342 states have internal predecessors, (4722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:31,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 4722 transitions. [2021-06-12 20:18:31,656 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 4722 transitions. Word has length 24 [2021-06-12 20:18:31,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:31,656 INFO L482 AbstractCegarLoop]: Abstraction has 1343 states and 4722 transitions. [2021-06-12 20:18:31,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:31,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 4722 transitions. [2021-06-12 20:18:31,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:18:31,658 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:31,658 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:31,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6069 [2021-06-12 20:18:31,881 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:31,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:31,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1833809906, now seen corresponding path program 273 times [2021-06-12 20:18:31,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:31,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426141744] [2021-06-12 20:18:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:32,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:32,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426141744] [2021-06-12 20:18:32,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426141744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:32,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586796626] [2021-06-12 20:18:32,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:32,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:18:32,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:32,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:18:32,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:32,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:18:32,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:32,208 INFO L628 ElimStorePlain]: treesize reduction 2, result has 91.7 percent of original size [2021-06-12 20:18:32,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:18:32,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:22 [2021-06-12 20:18:32,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:32,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:32,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:32,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:32,407 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:18:32,408 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:32,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:18:32,412 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:32,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:32,416 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:32,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:32,420 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:32,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:18:32,423 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:32,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:32,427 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:32,531 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-06-12 20:18:32,531 INFO L628 ElimStorePlain]: treesize reduction 20, result has 80.4 percent of original size [2021-06-12 20:18:32,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:32,535 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:32,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:32,539 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:32,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:32,543 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:32,589 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.4 percent of original size [2021-06-12 20:18:32,589 INFO L518 ElimStorePlain]: Eliminatee v_prenex_215 vanished before elimination [2021-06-12 20:18:32,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:18:32,591 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:201, output treesize:34 [2021-06-12 20:18:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:18:32,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586796626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:32,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:32,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 20:18:32,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070123877] [2021-06-12 20:18:32,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:18:32,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:32,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:18:32,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:18:32,676 INFO L87 Difference]: Start difference. First operand 1343 states and 4722 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:33,202 INFO L93 Difference]: Finished difference Result 1761 states and 5948 transitions. [2021-06-12 20:18:33,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:18:33,202 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:18:33,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:33,207 INFO L225 Difference]: With dead ends: 1761 [2021-06-12 20:18:33,207 INFO L226 Difference]: Without dead ends: 1710 [2021-06-12 20:18:33,207 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 452.2ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:18:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-06-12 20:18:33,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1371. [2021-06-12 20:18:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 3.55036496350365) internal successors, (4864), 1370 states have internal predecessors, (4864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:33,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 4864 transitions. [2021-06-12 20:18:33,228 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 4864 transitions. Word has length 24 [2021-06-12 20:18:33,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:33,228 INFO L482 AbstractCegarLoop]: Abstraction has 1371 states and 4864 transitions. [2021-06-12 20:18:33,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:33,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 4864 transitions. [2021-06-12 20:18:33,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:18:33,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:33,231 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:33,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6079 [2021-06-12 20:18:33,453 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:33,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:33,453 INFO L82 PathProgramCache]: Analyzing trace with hash -220243172, now seen corresponding path program 274 times [2021-06-12 20:18:33,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:33,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699958140] [2021-06-12 20:18:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:33,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:33,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699958140] [2021-06-12 20:18:33,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699958140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:33,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332606467] [2021-06-12 20:18:33,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:33,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:18:33,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:33,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:18:33,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:33,775 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:18:33,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:33,802 INFO L628 ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size [2021-06-12 20:18:33,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:18:33,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:33,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:18:33,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:18:33,817 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:22 [2021-06-12 20:18:33,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:33,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:33,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:33,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:34,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:34,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:34,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:34,006 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:34,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:34,011 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:34,014 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:18:34,014 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:34,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:34,019 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:34,021 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:18:34,022 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:34,107 INFO L628 ElimStorePlain]: treesize reduction 42, result has 66.4 percent of original size [2021-06-12 20:18:34,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:34,111 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:34,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:34,115 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:34,182 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.1 percent of original size [2021-06-12 20:18:34,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:34,186 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:34,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:18:34,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:34,221 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:34,267 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.8 percent of original size [2021-06-12 20:18:34,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:18:34,300 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:201, output treesize:34 [2021-06-12 20:18:34,621 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-06-12 20:18:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:18:34,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332606467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:34,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:34,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 20:18:34,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461166933] [2021-06-12 20:18:34,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:18:34,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:34,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:18:34,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:18:34,662 INFO L87 Difference]: Start difference. First operand 1371 states and 4864 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:35,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:35,275 INFO L93 Difference]: Finished difference Result 1701 states and 5782 transitions. [2021-06-12 20:18:35,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:18:35,275 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:18:35,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:35,278 INFO L225 Difference]: With dead ends: 1701 [2021-06-12 20:18:35,278 INFO L226 Difference]: Without dead ends: 1638 [2021-06-12 20:18:35,278 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 856.9ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:18:35,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-06-12 20:18:35,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1296. [2021-06-12 20:18:35,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 3.498069498069498) internal successors, (4530), 1295 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 4530 transitions. [2021-06-12 20:18:35,296 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 4530 transitions. Word has length 24 [2021-06-12 20:18:35,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:35,297 INFO L482 AbstractCegarLoop]: Abstraction has 1296 states and 4530 transitions. [2021-06-12 20:18:35,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:35,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 4530 transitions. [2021-06-12 20:18:35,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:18:35,298 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:35,298 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:35,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6124 [2021-06-12 20:18:35,521 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:35,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:35,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1355776782, now seen corresponding path program 275 times [2021-06-12 20:18:35,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:35,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653137238] [2021-06-12 20:18:35,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:35,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:35,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653137238] [2021-06-12 20:18:35,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653137238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:35,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870042774] [2021-06-12 20:18:35,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:35,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:18:35,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:35,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:18:35,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:35,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:35,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:35,861 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-06-12 20:18:35,861 INFO L518 ElimStorePlain]: Eliminatee v_prenex_219 vanished before elimination [2021-06-12 20:18:35,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:18:35,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-12 20:18:35,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:35,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:35,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:35,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:35,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:18:35,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:35,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:18:35,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:35,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:35,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:35,956 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:35,986 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-12 20:18:35,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:18:35,987 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-12 20:18:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:18:36,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870042774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:36,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:36,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:18:36,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714753545] [2021-06-12 20:18:36,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:18:36,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:36,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:18:36,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:18:36,030 INFO L87 Difference]: Start difference. First operand 1296 states and 4530 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:36,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:36,518 INFO L93 Difference]: Finished difference Result 1571 states and 5344 transitions. [2021-06-12 20:18:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:18:36,518 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:18:36,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:36,521 INFO L225 Difference]: With dead ends: 1571 [2021-06-12 20:18:36,521 INFO L226 Difference]: Without dead ends: 1520 [2021-06-12 20:18:36,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 406.9ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:18:36,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-12 20:18:36,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1335. [2021-06-12 20:18:36,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 3.505247376311844) internal successors, (4676), 1334 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:36,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 4676 transitions. [2021-06-12 20:18:36,559 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 4676 transitions. Word has length 24 [2021-06-12 20:18:36,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:36,559 INFO L482 AbstractCegarLoop]: Abstraction has 1335 states and 4676 transitions. [2021-06-12 20:18:36,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:36,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 4676 transitions. [2021-06-12 20:18:36,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:18:36,561 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:36,561 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:36,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6168 [2021-06-12 20:18:36,769 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:36,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:36,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1763699870, now seen corresponding path program 276 times [2021-06-12 20:18:36,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:36,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109649109] [2021-06-12 20:18:36,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:36,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:36,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109649109] [2021-06-12 20:18:36,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109649109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:36,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512937972] [2021-06-12 20:18:36,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:37,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:18:37,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:37,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:18:37,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:37,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:18:37,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:37,113 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-12 20:18:37,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:37,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:37,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:18:37,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:18:37,128 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-12 20:18:37,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:37,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:37,489 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-06-12 20:18:37,489 INFO L628 ElimStorePlain]: treesize reduction 49, result has 65.7 percent of original size [2021-06-12 20:18:37,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:37,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:37,681 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 31 [2021-06-12 20:18:37,681 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-12 20:18:37,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:37,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:37,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:37,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:37,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:37,694 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:37,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:37,698 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:37,770 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.3 percent of original size [2021-06-12 20:18:37,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:37,774 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:37,830 INFO L628 ElimStorePlain]: treesize reduction 16, result has 76.8 percent of original size [2021-06-12 20:18:37,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:37,834 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:37,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:18:37,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:18:37,862 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:146, output treesize:34 [2021-06-12 20:18:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:18:37,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512937972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:37,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:37,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 20:18:37,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941177753] [2021-06-12 20:18:37,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:18:37,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:37,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:18:37,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:18:37,960 INFO L87 Difference]: Start difference. First operand 1335 states and 4676 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:38,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:38,454 INFO L93 Difference]: Finished difference Result 1723 states and 5814 transitions. [2021-06-12 20:18:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:18:38,454 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:18:38,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:38,457 INFO L225 Difference]: With dead ends: 1723 [2021-06-12 20:18:38,457 INFO L226 Difference]: Without dead ends: 1672 [2021-06-12 20:18:38,458 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 453.8ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:18:38,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-06-12 20:18:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1363. [2021-06-12 20:18:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.537444933920705) internal successors, (4818), 1362 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:38,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4818 transitions. [2021-06-12 20:18:38,476 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4818 transitions. Word has length 24 [2021-06-12 20:18:38,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:38,476 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4818 transitions. [2021-06-12 20:18:38,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:38,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4818 transitions. [2021-06-12 20:18:38,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:18:38,478 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:38,478 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:38,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6174 [2021-06-12 20:18:38,679 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:38,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:38,679 INFO L82 PathProgramCache]: Analyzing trace with hash -150133136, now seen corresponding path program 277 times [2021-06-12 20:18:38,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:38,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310448317] [2021-06-12 20:18:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:38,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:38,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310448317] [2021-06-12 20:18:38,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310448317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:38,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086018759] [2021-06-12 20:18:38,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:38,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:18:38,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:39,020 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:18:39,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:39,046 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-12 20:18:39,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:39,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:39,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:18:39,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:18:39,061 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-12 20:18:39,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:39,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:39,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:39,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:39,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:39,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:39,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:39,227 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:39,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:18:39,232 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:39,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:39,236 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:39,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:18:39,240 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:39,243 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:18:39,244 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:39,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:18:39,248 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:39,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:18:39,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:39,304 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:39,365 INFO L628 ElimStorePlain]: treesize reduction 40, result has 59.6 percent of original size [2021-06-12 20:18:39,365 INFO L518 ElimStorePlain]: Eliminatee v_prenex_227 vanished before elimination [2021-06-12 20:18:39,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:39,369 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:39,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:39,373 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:39,417 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.2 percent of original size [2021-06-12 20:18:39,417 INFO L518 ElimStorePlain]: Eliminatee v_prenex_226 vanished before elimination [2021-06-12 20:18:39,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:18:39,419 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:224, output treesize:34 [2021-06-12 20:18:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:18:39,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086018759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:39,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:39,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 20:18:39,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410930845] [2021-06-12 20:18:39,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:18:39,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:39,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:18:39,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:18:39,509 INFO L87 Difference]: Start difference. First operand 1363 states and 4818 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:40,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:40,085 INFO L93 Difference]: Finished difference Result 1653 states and 5622 transitions. [2021-06-12 20:18:40,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:18:40,086 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:18:40,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:40,089 INFO L225 Difference]: With dead ends: 1653 [2021-06-12 20:18:40,089 INFO L226 Difference]: Without dead ends: 1590 [2021-06-12 20:18:40,089 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 501.7ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:18:40,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2021-06-12 20:18:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1310. [2021-06-12 20:18:40,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 3.4935064935064934) internal successors, (4573), 1309 states have internal predecessors, (4573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 4573 transitions. [2021-06-12 20:18:40,109 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 4573 transitions. Word has length 24 [2021-06-12 20:18:40,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:40,109 INFO L482 AbstractCegarLoop]: Abstraction has 1310 states and 4573 transitions. [2021-06-12 20:18:40,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:40,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 4573 transitions. [2021-06-12 20:18:40,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:18:40,111 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:40,111 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:40,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6193,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:40,335 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:40,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:40,335 INFO L82 PathProgramCache]: Analyzing trace with hash 316771726, now seen corresponding path program 278 times [2021-06-12 20:18:40,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:40,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310457535] [2021-06-12 20:18:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:40,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:40,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310457535] [2021-06-12 20:18:40,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310457535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:40,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326190194] [2021-06-12 20:18:40,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:40,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:18:40,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:40,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:18:40,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:18:41,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326190194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:41,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:41,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-12 20:18:41,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425317232] [2021-06-12 20:18:41,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:18:41,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:41,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:18:41,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:18:41,076 INFO L87 Difference]: Start difference. First operand 1310 states and 4573 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:44,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:44,128 INFO L93 Difference]: Finished difference Result 2070 states and 6696 transitions. [2021-06-12 20:18:44,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 20:18:44,128 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:18:44,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:44,132 INFO L225 Difference]: With dead ends: 2070 [2021-06-12 20:18:44,132 INFO L226 Difference]: Without dead ends: 1863 [2021-06-12 20:18:44,133 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 2716.9ms TimeCoverageRelationStatistics Valid=464, Invalid=3568, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 20:18:44,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2021-06-12 20:18:44,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1361. [2021-06-12 20:18:44,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.522794117647059) internal successors, (4791), 1360 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:44,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4791 transitions. [2021-06-12 20:18:44,155 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4791 transitions. Word has length 24 [2021-06-12 20:18:44,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:44,155 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4791 transitions. [2021-06-12 20:18:44,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4791 transitions. [2021-06-12 20:18:44,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:18:44,157 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:44,157 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:44,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6228,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:44,358 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:44,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:44,358 INFO L82 PathProgramCache]: Analyzing trace with hash 856040988, now seen corresponding path program 279 times [2021-06-12 20:18:44,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:44,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947014640] [2021-06-12 20:18:44,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:44,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:44,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947014640] [2021-06-12 20:18:44,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947014640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:44,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094141405] [2021-06-12 20:18:44,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:44,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:18:44,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:44,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:18:44,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:44,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:44,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:44,730 INFO L628 ElimStorePlain]: treesize reduction 56, result has 61.1 percent of original size [2021-06-12 20:18:44,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:44,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:44,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:44,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:44,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:44,739 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:44,786 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-12 20:18:44,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:18:44,786 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:147, output treesize:58 [2021-06-12 20:18:44,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:44,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:44,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:44,865 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:44,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:44,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:44,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:44,871 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:44,939 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-12 20:18:44,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:44,942 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:44,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:44,945 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:44,994 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-12 20:18:44,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:18:44,996 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-12 20:18:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:18:45,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094141405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:45,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:45,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 20:18:45,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676444410] [2021-06-12 20:18:45,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:18:45,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:45,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:18:45,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:18:45,074 INFO L87 Difference]: Start difference. First operand 1361 states and 4791 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:46,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:46,095 INFO L93 Difference]: Finished difference Result 1718 states and 5748 transitions. [2021-06-12 20:18:46,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:18:46,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:18:46,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:46,097 INFO L225 Difference]: With dead ends: 1718 [2021-06-12 20:18:46,097 INFO L226 Difference]: Without dead ends: 1655 [2021-06-12 20:18:46,097 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 888.0ms TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:18:46,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-06-12 20:18:46,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1342. [2021-06-12 20:18:46,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 3.4966442953020134) internal successors, (4689), 1341 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:46,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 4689 transitions. [2021-06-12 20:18:46,112 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 4689 transitions. Word has length 24 [2021-06-12 20:18:46,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:46,112 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 4689 transitions. [2021-06-12 20:18:46,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:46,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 4689 transitions. [2021-06-12 20:18:46,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:18:46,114 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:46,114 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:46,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6250 [2021-06-12 20:18:46,314 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:46,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:46,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1348636750, now seen corresponding path program 280 times [2021-06-12 20:18:46,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:46,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057491526] [2021-06-12 20:18:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:46,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:46,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057491526] [2021-06-12 20:18:46,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057491526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:46,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444724727] [2021-06-12 20:18:46,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:46,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:18:46,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:46,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:18:46,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:18:46,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444724727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:46,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:46,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-12 20:18:46,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177632407] [2021-06-12 20:18:46,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:18:46,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:46,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:18:46,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:18:46,935 INFO L87 Difference]: Start difference. First operand 1342 states and 4689 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:49,710 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-12 20:18:51,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:51,155 INFO L93 Difference]: Finished difference Result 2255 states and 7301 transitions. [2021-06-12 20:18:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 20:18:51,155 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:18:51,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:51,158 INFO L225 Difference]: With dead ends: 2255 [2021-06-12 20:18:51,158 INFO L226 Difference]: Without dead ends: 2058 [2021-06-12 20:18:51,159 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1649 ImplicationChecksByTransitivity, 3842.2ms TimeCoverageRelationStatistics Valid=801, Invalid=4601, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 20:18:51,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-06-12 20:18:51,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1333. [2021-06-12 20:18:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1332 states have (on average 3.4977477477477477) internal successors, (4659), 1332 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 4659 transitions. [2021-06-12 20:18:51,176 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 4659 transitions. Word has length 24 [2021-06-12 20:18:51,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:51,176 INFO L482 AbstractCegarLoop]: Abstraction has 1333 states and 4659 transitions. [2021-06-12 20:18:51,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:51,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 4659 transitions. [2021-06-12 20:18:51,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:18:51,177 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:51,177 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:51,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6266 [2021-06-12 20:18:51,378 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:51,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:51,378 INFO L82 PathProgramCache]: Analyzing trace with hash 257555664, now seen corresponding path program 281 times [2021-06-12 20:18:51,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:51,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964642178] [2021-06-12 20:18:51,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:18:51,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:51,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964642178] [2021-06-12 20:18:51,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964642178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:51,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440496205] [2021-06-12 20:18:51,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:51,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:18:51,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:51,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:18:51,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:18:51,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440496205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:51,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:51,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-12 20:18:51,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037852306] [2021-06-12 20:18:51,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:18:51,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:51,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:18:51,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:18:51,853 INFO L87 Difference]: Start difference. First operand 1333 states and 4659 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:56,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:56,005 INFO L93 Difference]: Finished difference Result 2603 states and 8192 transitions. [2021-06-12 20:18:56,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 20:18:56,006 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:18:56,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:56,009 INFO L225 Difference]: With dead ends: 2603 [2021-06-12 20:18:56,009 INFO L226 Difference]: Without dead ends: 2202 [2021-06-12 20:18:56,009 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 3659.3ms TimeCoverageRelationStatistics Valid=681, Invalid=4721, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 20:18:56,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-06-12 20:18:56,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1438. [2021-06-12 20:18:56,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 3.405010438413361) internal successors, (4893), 1437 states have internal predecessors, (4893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:56,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4893 transitions. [2021-06-12 20:18:56,027 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4893 transitions. Word has length 24 [2021-06-12 20:18:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:56,027 INFO L482 AbstractCegarLoop]: Abstraction has 1438 states and 4893 transitions. [2021-06-12 20:18:56,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:56,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4893 transitions. [2021-06-12 20:18:56,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:18:56,029 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:56,029 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:56,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6286 [2021-06-12 20:18:56,229 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:56,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:56,229 INFO L82 PathProgramCache]: Analyzing trace with hash 668428116, now seen corresponding path program 282 times [2021-06-12 20:18:56,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:56,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086544986] [2021-06-12 20:18:56,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:56,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:56,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086544986] [2021-06-12 20:18:56,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086544986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:56,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94746779] [2021-06-12 20:18:56,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:56,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:18:56,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:18:56,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:18:56,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:56,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:56,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:56,601 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.0 percent of original size [2021-06-12 20:18:56,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:56,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:56,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:18:56,634 INFO L518 ElimStorePlain]: Eliminatee v_prenex_229 vanished before elimination [2021-06-12 20:18:56,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:56,637 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:56,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:18:56,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:18:56,668 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:142, output treesize:68 [2021-06-12 20:18:57,000 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_233, ends_with_10], 1=[ends_with_6]} [2021-06-12 20:18:57,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:18:57,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:57,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:57,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:57,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:57,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:57,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:57,015 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:57,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:18:57,018 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:57,020 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:18:57,021 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:57,127 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-06-12 20:18:57,127 INFO L628 ElimStorePlain]: treesize reduction 70, result has 63.9 percent of original size [2021-06-12 20:18:57,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:57,131 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:57,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:57,134 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:57,191 INFO L628 ElimStorePlain]: treesize reduction 50, result has 57.6 percent of original size [2021-06-12 20:18:57,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:18:57,195 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:57,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:18:57,197 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:18:57,229 INFO L628 ElimStorePlain]: treesize reduction 20, result has 67.2 percent of original size [2021-06-12 20:18:57,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:18:57,230 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:303, output treesize:20 [2021-06-12 20:18:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:18:57,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94746779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:57,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:57,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-12 20:18:57,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602773499] [2021-06-12 20:18:57,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:18:57,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:57,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:18:57,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:18:57,283 INFO L87 Difference]: Start difference. First operand 1438 states and 4893 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:59,127 INFO L93 Difference]: Finished difference Result 1986 states and 6506 transitions. [2021-06-12 20:18:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:18:59,127 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:18:59,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:59,130 INFO L225 Difference]: With dead ends: 1986 [2021-06-12 20:18:59,130 INFO L226 Difference]: Without dead ends: 1869 [2021-06-12 20:18:59,130 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1477.1ms TimeCoverageRelationStatistics Valid=325, Invalid=2225, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:18:59,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-06-12 20:18:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1539. [2021-06-12 20:18:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 3.4213263979193758) internal successors, (5262), 1538 states have internal predecessors, (5262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 5262 transitions. [2021-06-12 20:18:59,147 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 5262 transitions. Word has length 24 [2021-06-12 20:18:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:59,147 INFO L482 AbstractCegarLoop]: Abstraction has 1539 states and 5262 transitions. [2021-06-12 20:18:59,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:59,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 5262 transitions. [2021-06-12 20:18:59,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:18:59,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:59,149 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:59,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6294,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:59,349 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:59,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:59,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1920773996, now seen corresponding path program 283 times [2021-06-12 20:18:59,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:59,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046101156] [2021-06-12 20:18:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:18:59,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:59,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046101156] [2021-06-12 20:18:59,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046101156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:59,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797237495] [2021-06-12 20:18:59,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:18:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:59,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:18:59,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:18:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:18:59,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797237495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:18:59,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:18:59,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-12 20:18:59,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460899329] [2021-06-12 20:18:59,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:18:59,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:59,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:18:59,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:18:59,852 INFO L87 Difference]: Start difference. First operand 1539 states and 5262 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:03,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:03,605 INFO L93 Difference]: Finished difference Result 3301 states and 10511 transitions. [2021-06-12 20:19:03,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 20:19:03,605 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:03,609 INFO L225 Difference]: With dead ends: 3301 [2021-06-12 20:19:03,609 INFO L226 Difference]: Without dead ends: 3123 [2021-06-12 20:19:03,609 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 3211.3ms TimeCoverageRelationStatistics Valid=843, Invalid=5319, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 20:19:03,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-06-12 20:19:03,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 1630. [2021-06-12 20:19:03,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.481890730509515) internal successors, (5672), 1629 states have internal predecessors, (5672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5672 transitions. [2021-06-12 20:19:03,633 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5672 transitions. Word has length 24 [2021-06-12 20:19:03,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:03,633 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 5672 transitions. [2021-06-12 20:19:03,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:03,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5672 transitions. [2021-06-12 20:19:03,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:03,635 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:03,635 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:03,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6348 [2021-06-12 20:19:03,835 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:03,835 INFO L82 PathProgramCache]: Analyzing trace with hash -235535934, now seen corresponding path program 284 times [2021-06-12 20:19:03,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:03,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289721824] [2021-06-12 20:19:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:03,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:03,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289721824] [2021-06-12 20:19:03,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289721824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:03,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048092580] [2021-06-12 20:19:03,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:04,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:19:04,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:04,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:19:04,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:04,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:19:04,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048092580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:04,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:04,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-12 20:19:04,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263686378] [2021-06-12 20:19:04,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:19:04,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:04,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:19:04,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:19:04,152 INFO L87 Difference]: Start difference. First operand 1630 states and 5672 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:04,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:04,959 INFO L93 Difference]: Finished difference Result 2215 states and 7479 transitions. [2021-06-12 20:19:04,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:19:04,959 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:04,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:04,962 INFO L225 Difference]: With dead ends: 2215 [2021-06-12 20:19:04,962 INFO L226 Difference]: Without dead ends: 2163 [2021-06-12 20:19:04,962 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 505.4ms TimeCoverageRelationStatistics Valid=225, Invalid=1415, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:19:04,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-12 20:19:04,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1718. [2021-06-12 20:19:04,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.4857309260337797) internal successors, (5985), 1717 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:04,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5985 transitions. [2021-06-12 20:19:04,981 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5985 transitions. Word has length 24 [2021-06-12 20:19:04,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:04,981 INFO L482 AbstractCegarLoop]: Abstraction has 1718 states and 5985 transitions. [2021-06-12 20:19:04,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:04,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5985 transitions. [2021-06-12 20:19:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:04,983 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:04,983 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:05,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6356 [2021-06-12 20:19:05,184 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:05,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:05,184 INFO L82 PathProgramCache]: Analyzing trace with hash -458096300, now seen corresponding path program 285 times [2021-06-12 20:19:05,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:05,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253106398] [2021-06-12 20:19:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:05,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:05,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253106398] [2021-06-12 20:19:05,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253106398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:05,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538894199] [2021-06-12 20:19:05,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:05,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:19:05,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:05,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 20:19:05,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:05,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:05,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:05,579 INFO L628 ElimStorePlain]: treesize reduction 31, result has 77.7 percent of original size [2021-06-12 20:19:05,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:05,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:05,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:05,622 INFO L518 ElimStorePlain]: Eliminatee v_prenex_236 vanished before elimination [2021-06-12 20:19:05,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:05,625 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:05,685 INFO L628 ElimStorePlain]: treesize reduction 24, result has 76.0 percent of original size [2021-06-12 20:19:05,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:05,688 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:05,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:05,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:19:05,719 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:142, output treesize:68 [2021-06-12 20:19:06,076 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_10, v_prenex_239], 1=[ends_with_6]} [2021-06-12 20:19:06,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:06,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:06,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:06,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:06,178 INFO L628 ElimStorePlain]: treesize reduction 273, result has 26.8 percent of original size [2021-06-12 20:19:06,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:06,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:06,235 INFO L628 ElimStorePlain]: treesize reduction 26, result has 72.9 percent of original size [2021-06-12 20:19:06,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:06,238 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:06,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:06,241 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:06,273 INFO L628 ElimStorePlain]: treesize reduction 20, result has 68.3 percent of original size [2021-06-12 20:19:06,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:19:06,275 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:379, output treesize:20 [2021-06-12 20:19:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:19:06,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538894199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:06,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:06,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2021-06-12 20:19:06,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252819379] [2021-06-12 20:19:06,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:19:06,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:06,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:19:06,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:19:06,328 INFO L87 Difference]: Start difference. First operand 1718 states and 5985 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:07,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:07,999 INFO L93 Difference]: Finished difference Result 2520 states and 8276 transitions. [2021-06-12 20:19:07,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:19:07,999 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:07,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:08,002 INFO L225 Difference]: With dead ends: 2520 [2021-06-12 20:19:08,002 INFO L226 Difference]: Without dead ends: 2369 [2021-06-12 20:19:08,003 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1238.3ms TimeCoverageRelationStatistics Valid=244, Invalid=2108, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:19:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-06-12 20:19:08,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 1751. [2021-06-12 20:19:08,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 3.4937142857142858) internal successors, (6114), 1750 states have internal predecessors, (6114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:08,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 6114 transitions. [2021-06-12 20:19:08,023 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 6114 transitions. Word has length 24 [2021-06-12 20:19:08,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:08,023 INFO L482 AbstractCegarLoop]: Abstraction has 1751 states and 6114 transitions. [2021-06-12 20:19:08,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:08,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 6114 transitions. [2021-06-12 20:19:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:08,025 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:08,025 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:08,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6359,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:08,226 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:08,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:08,226 INFO L82 PathProgramCache]: Analyzing trace with hash -2039999204, now seen corresponding path program 286 times [2021-06-12 20:19:08,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:08,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764574723] [2021-06-12 20:19:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:08,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:08,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764574723] [2021-06-12 20:19:08,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764574723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:08,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489920308] [2021-06-12 20:19:08,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:08,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:19:08,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:08,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:19:08,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:08,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489920308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:08,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:08,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-12 20:19:08,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529064359] [2021-06-12 20:19:08,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:19:08,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:08,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:19:08,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:19:08,703 INFO L87 Difference]: Start difference. First operand 1751 states and 6114 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:12,377 INFO L93 Difference]: Finished difference Result 3157 states and 10097 transitions. [2021-06-12 20:19:12,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 20:19:12,377 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:12,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:12,381 INFO L225 Difference]: With dead ends: 3157 [2021-06-12 20:19:12,381 INFO L226 Difference]: Without dead ends: 2874 [2021-06-12 20:19:12,382 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 3219.0ms TimeCoverageRelationStatistics Valid=618, Invalid=4638, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 20:19:12,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2021-06-12 20:19:12,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 1764. [2021-06-12 20:19:12,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.4951786727169596) internal successors, (6162), 1763 states have internal predecessors, (6162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:12,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 6162 transitions. [2021-06-12 20:19:12,406 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 6162 transitions. Word has length 24 [2021-06-12 20:19:12,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:12,406 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 6162 transitions. [2021-06-12 20:19:12,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 6162 transitions. [2021-06-12 20:19:12,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:12,408 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:12,408 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:12,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6443 [2021-06-12 20:19:12,609 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:12,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:12,609 INFO L82 PathProgramCache]: Analyzing trace with hash 133379628, now seen corresponding path program 287 times [2021-06-12 20:19:12,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:12,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105120592] [2021-06-12 20:19:12,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:19:12,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:12,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105120592] [2021-06-12 20:19:12,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105120592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:12,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754366380] [2021-06-12 20:19:12,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:12,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:19:12,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:12,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:19:12,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:13,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754366380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:13,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:13,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-12 20:19:13,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798064776] [2021-06-12 20:19:13,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:19:13,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:13,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:19:13,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:19:13,191 INFO L87 Difference]: Start difference. First operand 1764 states and 6162 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:18,226 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-12 20:19:18,501 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-12 20:19:18,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:18,515 INFO L93 Difference]: Finished difference Result 3655 states and 11498 transitions. [2021-06-12 20:19:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 20:19:18,516 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:18,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:18,522 INFO L225 Difference]: With dead ends: 3655 [2021-06-12 20:19:18,522 INFO L226 Difference]: Without dead ends: 3430 [2021-06-12 20:19:18,522 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 4527.9ms TimeCoverageRelationStatistics Valid=873, Invalid=6609, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 20:19:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2021-06-12 20:19:18,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 1749. [2021-06-12 20:19:18,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.482265446224256) internal successors, (6087), 1748 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 6087 transitions. [2021-06-12 20:19:18,560 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 6087 transitions. Word has length 24 [2021-06-12 20:19:18,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:18,560 INFO L482 AbstractCegarLoop]: Abstraction has 1749 states and 6087 transitions. [2021-06-12 20:19:18,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:18,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 6087 transitions. [2021-06-12 20:19:18,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:18,562 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:18,562 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:18,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6449,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:18,773 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:18,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:18,773 INFO L82 PathProgramCache]: Analyzing trace with hash -269481576, now seen corresponding path program 288 times [2021-06-12 20:19:18,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:18,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214869857] [2021-06-12 20:19:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:18,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:18,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214869857] [2021-06-12 20:19:18,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214869857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:18,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325968258] [2021-06-12 20:19:18,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:19,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:19:19,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:19,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:19:19,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:19,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325968258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:19,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:19,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-12 20:19:19,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722623628] [2021-06-12 20:19:19,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:19:19,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:19,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:19:19,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:19:19,357 INFO L87 Difference]: Start difference. First operand 1749 states and 6087 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:22,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:22,357 INFO L93 Difference]: Finished difference Result 2734 states and 8909 transitions. [2021-06-12 20:19:22,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 20:19:22,357 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:22,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:22,362 INFO L225 Difference]: With dead ends: 2734 [2021-06-12 20:19:22,362 INFO L226 Difference]: Without dead ends: 2513 [2021-06-12 20:19:22,362 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 2375.3ms TimeCoverageRelationStatistics Valid=387, Invalid=2919, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 20:19:22,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-06-12 20:19:22,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 1670. [2021-06-12 20:19:22,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4703415218693827) internal successors, (5792), 1669 states have internal predecessors, (5792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5792 transitions. [2021-06-12 20:19:22,392 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5792 transitions. Word has length 24 [2021-06-12 20:19:22,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:22,392 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5792 transitions. [2021-06-12 20:19:22,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:22,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5792 transitions. [2021-06-12 20:19:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:22,395 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:22,395 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:22,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6459 [2021-06-12 20:19:22,612 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:22,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:22,612 INFO L82 PathProgramCache]: Analyzing trace with hash 348529114, now seen corresponding path program 289 times [2021-06-12 20:19:22,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:22,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930394914] [2021-06-12 20:19:22,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:22,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:22,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:22,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930394914] [2021-06-12 20:19:22,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930394914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:22,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118235219] [2021-06-12 20:19:22,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:22,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:22,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:22,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:22,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:22,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:22,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:22,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:22,938 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:22,980 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-12 20:19:22,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:22,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:22,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:22,987 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:23,017 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-12 20:19:23,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:19:23,018 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-12 20:19:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:23,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118235219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:23,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:23,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-06-12 20:19:23,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583934456] [2021-06-12 20:19:23,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:19:23,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:23,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:19:23,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:19:23,070 INFO L87 Difference]: Start difference. First operand 1670 states and 5792 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:23,572 INFO L93 Difference]: Finished difference Result 1982 states and 6731 transitions. [2021-06-12 20:19:23,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:19:23,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:23,576 INFO L225 Difference]: With dead ends: 1982 [2021-06-12 20:19:23,576 INFO L226 Difference]: Without dead ends: 1904 [2021-06-12 20:19:23,577 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:19:23,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2021-06-12 20:19:23,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1686. [2021-06-12 20:19:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.4735905044510385) internal successors, (5853), 1685 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:23,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5853 transitions. [2021-06-12 20:19:23,600 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5853 transitions. Word has length 24 [2021-06-12 20:19:23,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:23,601 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 5853 transitions. [2021-06-12 20:19:23,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:23,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5853 transitions. [2021-06-12 20:19:23,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:23,603 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:23,603 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:23,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6467,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:23,826 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:23,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:23,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1865966586, now seen corresponding path program 290 times [2021-06-12 20:19:23,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:23,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082337534] [2021-06-12 20:19:23,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:23,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:23,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082337534] [2021-06-12 20:19:23,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082337534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:23,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769171072] [2021-06-12 20:19:23,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:24,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:19:24,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:24,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:24,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:24,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:24,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:24,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:24,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:24,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:19:24,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:24,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:24,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:24,244 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:24,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:24,247 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:24,279 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-12 20:19:24,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:19:24,280 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-12 20:19:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:24,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769171072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:24,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:24,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-12 20:19:24,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302405100] [2021-06-12 20:19:24,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:19:24,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:24,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:19:24,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:19:24,359 INFO L87 Difference]: Start difference. First operand 1686 states and 5853 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:24,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:24,753 INFO L93 Difference]: Finished difference Result 2113 states and 7151 transitions. [2021-06-12 20:19:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:19:24,754 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:24,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:24,757 INFO L225 Difference]: With dead ends: 2113 [2021-06-12 20:19:24,757 INFO L226 Difference]: Without dead ends: 2044 [2021-06-12 20:19:24,757 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:19:24,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-06-12 20:19:24,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1716. [2021-06-12 20:19:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 3.4816326530612245) internal successors, (5971), 1715 states have internal predecessors, (5971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5971 transitions. [2021-06-12 20:19:24,784 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5971 transitions. Word has length 24 [2021-06-12 20:19:24,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:24,784 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 5971 transitions. [2021-06-12 20:19:24,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5971 transitions. [2021-06-12 20:19:24,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:24,787 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:24,787 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:25,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6474 [2021-06-12 20:19:25,002 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:25,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:25,003 INFO L82 PathProgramCache]: Analyzing trace with hash -690475942, now seen corresponding path program 291 times [2021-06-12 20:19:25,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:25,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831909818] [2021-06-12 20:19:25,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:25,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:25,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831909818] [2021-06-12 20:19:25,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831909818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:25,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550918188] [2021-06-12 20:19:25,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:25,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:19:25,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:25,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:25,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:25,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550918188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:25,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:25,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:19:25,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989625078] [2021-06-12 20:19:25,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:19:25,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:25,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:19:25,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:19:25,447 INFO L87 Difference]: Start difference. First operand 1716 states and 5971 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:25,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:25,839 INFO L93 Difference]: Finished difference Result 2181 states and 7378 transitions. [2021-06-12 20:19:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:19:25,839 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:25,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:25,842 INFO L225 Difference]: With dead ends: 2181 [2021-06-12 20:19:25,842 INFO L226 Difference]: Without dead ends: 2121 [2021-06-12 20:19:25,842 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 326.7ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:19:25,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2021-06-12 20:19:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1750. [2021-06-12 20:19:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 3.509433962264151) internal successors, (6138), 1749 states have internal predecessors, (6138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 6138 transitions. [2021-06-12 20:19:25,862 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 6138 transitions. Word has length 24 [2021-06-12 20:19:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:25,862 INFO L482 AbstractCegarLoop]: Abstraction has 1750 states and 6138 transitions. [2021-06-12 20:19:25,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:25,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 6138 transitions. [2021-06-12 20:19:25,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:25,865 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:25,865 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:26,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6481,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:26,065 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:26,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:26,065 INFO L82 PathProgramCache]: Analyzing trace with hash 923090792, now seen corresponding path program 292 times [2021-06-12 20:19:26,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:26,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613739484] [2021-06-12 20:19:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:26,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:26,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613739484] [2021-06-12 20:19:26,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613739484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:26,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258983983] [2021-06-12 20:19:26,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:26,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:19:26,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:26,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:26,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:26,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258983983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:26,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:26,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:19:26,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131795334] [2021-06-12 20:19:26,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:19:26,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:26,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:19:26,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:19:26,431 INFO L87 Difference]: Start difference. First operand 1750 states and 6138 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:26,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:26,802 INFO L93 Difference]: Finished difference Result 2037 states and 6922 transitions. [2021-06-12 20:19:26,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:19:26,803 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:26,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:26,805 INFO L225 Difference]: With dead ends: 2037 [2021-06-12 20:19:26,806 INFO L226 Difference]: Without dead ends: 1968 [2021-06-12 20:19:26,806 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 308.8ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:19:26,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-06-12 20:19:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1662. [2021-06-12 20:19:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.4659843467790488) internal successors, (5757), 1661 states have internal predecessors, (5757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:26,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5757 transitions. [2021-06-12 20:19:26,825 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5757 transitions. Word has length 24 [2021-06-12 20:19:26,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:26,825 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5757 transitions. [2021-06-12 20:19:26,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:26,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5757 transitions. [2021-06-12 20:19:26,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:26,827 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:26,827 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:27,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6489,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:27,027 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:27,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:27,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1795856550, now seen corresponding path program 293 times [2021-06-12 20:19:27,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:27,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229203711] [2021-06-12 20:19:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:27,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:27,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229203711] [2021-06-12 20:19:27,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229203711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:27,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415815287] [2021-06-12 20:19:27,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:27,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:19:27,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:27,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:27,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:27,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:27,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:27,290 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-12 20:19:27,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:19:27,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-12 20:19:27,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:27,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:27,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:27,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:27,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:27,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:27,382 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-12 20:19:27,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:27,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:27,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:27,388 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:27,414 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-12 20:19:27,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:19:27,415 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-12 20:19:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:27,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415815287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:27,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:27,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-12 20:19:27,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827322307] [2021-06-12 20:19:27,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:19:27,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:27,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:19:27,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:19:27,461 INFO L87 Difference]: Start difference. First operand 1662 states and 5757 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:27,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:27,805 INFO L93 Difference]: Finished difference Result 1959 states and 6670 transitions. [2021-06-12 20:19:27,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:19:27,806 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:27,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:27,808 INFO L225 Difference]: With dead ends: 1959 [2021-06-12 20:19:27,809 INFO L226 Difference]: Without dead ends: 1890 [2021-06-12 20:19:27,809 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 315.7ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:19:27,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-06-12 20:19:27,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1713. [2021-06-12 20:19:27,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1712 states have (on average 3.4696261682242993) internal successors, (5940), 1712 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:27,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 5940 transitions. [2021-06-12 20:19:27,843 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 5940 transitions. Word has length 24 [2021-06-12 20:19:27,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:27,843 INFO L482 AbstractCegarLoop]: Abstraction has 1713 states and 5940 transitions. [2021-06-12 20:19:27,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 5940 transitions. [2021-06-12 20:19:27,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:27,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:27,845 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:28,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6500,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:28,046 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:28,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:28,046 INFO L82 PathProgramCache]: Analyzing trace with hash -620365906, now seen corresponding path program 294 times [2021-06-12 20:19:28,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:28,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241446327] [2021-06-12 20:19:28,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:28,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:28,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241446327] [2021-06-12 20:19:28,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241446327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:28,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503967315] [2021-06-12 20:19:28,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:28,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:19:28,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:28,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:28,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:28,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:28,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:28,312 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-12 20:19:28,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:19:28,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-12 20:19:28,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:28,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:28,444 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:19:28,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:28,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:28,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:28,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:28,451 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:28,454 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:19:28,454 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:28,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:28,458 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:28,460 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:19:28,461 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:28,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:28,464 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:28,534 INFO L628 ElimStorePlain]: treesize reduction 19, result has 81.4 percent of original size [2021-06-12 20:19:28,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:28,537 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:28,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:28,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:28,582 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:28,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:28,585 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:28,640 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.9 percent of original size [2021-06-12 20:19:28,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:28,644 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:28,690 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.8 percent of original size [2021-06-12 20:19:28,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:19:28,691 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:201, output treesize:34 [2021-06-12 20:19:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:28,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503967315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:28,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:28,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:19:28,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798478036] [2021-06-12 20:19:28,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:19:28,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:28,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:19:28,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:19:28,765 INFO L87 Difference]: Start difference. First operand 1713 states and 5940 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:29,162 INFO L93 Difference]: Finished difference Result 2126 states and 7197 transitions. [2021-06-12 20:19:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:19:29,162 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:29,165 INFO L225 Difference]: With dead ends: 2126 [2021-06-12 20:19:29,165 INFO L226 Difference]: Without dead ends: 2066 [2021-06-12 20:19:29,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 344.9ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:19:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2021-06-12 20:19:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1747. [2021-06-12 20:19:29,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 3.497709049255441) internal successors, (6107), 1746 states have internal predecessors, (6107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:29,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 6107 transitions. [2021-06-12 20:19:29,184 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 6107 transitions. Word has length 24 [2021-06-12 20:19:29,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:29,185 INFO L482 AbstractCegarLoop]: Abstraction has 1747 states and 6107 transitions. [2021-06-12 20:19:29,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 6107 transitions. [2021-06-12 20:19:29,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:29,187 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:29,187 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:29,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6508 [2021-06-12 20:19:29,387 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:29,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:29,387 INFO L82 PathProgramCache]: Analyzing trace with hash 993200828, now seen corresponding path program 295 times [2021-06-12 20:19:29,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:29,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723517827] [2021-06-12 20:19:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:29,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:29,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723517827] [2021-06-12 20:19:29,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723517827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:29,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097471091] [2021-06-12 20:19:29,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:29,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:29,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:29,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:19:29,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:29,658 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-12 20:19:29,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:29,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:29,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:29,670 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:19:29,670 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-12 20:19:29,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:29,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:29,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:29,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:29,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:29,824 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:29,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:29,827 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:29,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:19:29,830 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:29,883 INFO L628 ElimStorePlain]: treesize reduction 43, result has 59.0 percent of original size [2021-06-12 20:19:29,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:29,886 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:29,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:29,889 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:29,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:29,892 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:29,930 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-12 20:19:29,931 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-12 20:19:29,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:19:29,932 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:146, output treesize:34 [2021-06-12 20:19:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:30,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097471091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:30,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:30,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:19:30,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557823038] [2021-06-12 20:19:30,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:19:30,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:30,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:19:30,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:19:30,006 INFO L87 Difference]: Start difference. First operand 1747 states and 6107 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:30,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:30,375 INFO L93 Difference]: Finished difference Result 1982 states and 6741 transitions. [2021-06-12 20:19:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:19:30,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:30,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:30,378 INFO L225 Difference]: With dead ends: 1982 [2021-06-12 20:19:30,378 INFO L226 Difference]: Without dead ends: 1915 [2021-06-12 20:19:30,378 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:19:30,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2021-06-12 20:19:30,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1683. [2021-06-12 20:19:30,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.460166468489893) internal successors, (5820), 1682 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5820 transitions. [2021-06-12 20:19:30,396 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5820 transitions. Word has length 24 [2021-06-12 20:19:30,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:30,396 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5820 transitions. [2021-06-12 20:19:30,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:30,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5820 transitions. [2021-06-12 20:19:30,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:30,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:30,398 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:30,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6551 [2021-06-12 20:19:30,599 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:30,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:30,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1460105690, now seen corresponding path program 296 times [2021-06-12 20:19:30,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:30,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11222610] [2021-06-12 20:19:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:30,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:30,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11222610] [2021-06-12 20:19:30,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11222610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:30,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413246863] [2021-06-12 20:19:30,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:30,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:19:30,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:30,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:30,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:30,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:30,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:30,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:30,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:30,925 INFO L628 ElimStorePlain]: treesize reduction 26, result has 70.5 percent of original size [2021-06-12 20:19:30,925 INFO L518 ElimStorePlain]: Eliminatee v_prenex_244 vanished before elimination [2021-06-12 20:19:30,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:30,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:30,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:30,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:19:30,952 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:95, output treesize:58 [2021-06-12 20:19:31,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:31,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:31,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:31,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:31,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:31,033 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:31,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:31,036 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:31,104 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-12 20:19:31,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:31,108 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:31,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:31,111 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:31,161 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-12 20:19:31,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:19:31,162 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-12 20:19:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:31,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413246863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:31,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:31,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:19:31,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618976610] [2021-06-12 20:19:31,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:19:31,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:31,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:19:31,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:19:31,243 INFO L87 Difference]: Start difference. First operand 1683 states and 5820 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:31,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:31,622 INFO L93 Difference]: Finished difference Result 2009 states and 6829 transitions. [2021-06-12 20:19:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:19:31,622 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:31,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:31,625 INFO L225 Difference]: With dead ends: 2009 [2021-06-12 20:19:31,625 INFO L226 Difference]: Without dead ends: 1949 [2021-06-12 20:19:31,625 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 371.9ms TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:19:31,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2021-06-12 20:19:31,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1736. [2021-06-12 20:19:31,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1736 states, 1735 states have (on average 3.4933717579250723) internal successors, (6061), 1735 states have internal predecessors, (6061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:31,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 6061 transitions. [2021-06-12 20:19:31,643 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 6061 transitions. Word has length 24 [2021-06-12 20:19:31,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:31,644 INFO L482 AbstractCegarLoop]: Abstraction has 1736 states and 6061 transitions. [2021-06-12 20:19:31,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:31,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 6061 transitions. [2021-06-12 20:19:31,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:31,645 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:31,646 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:31,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6593 [2021-06-12 20:19:31,846 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:31,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:31,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1221294872, now seen corresponding path program 297 times [2021-06-12 20:19:31,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:31,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192109642] [2021-06-12 20:19:31,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:31,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:31,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192109642] [2021-06-12 20:19:31,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192109642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:31,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372301707] [2021-06-12 20:19:31,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:32,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:19:32,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:32,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:32,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:32,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:32,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:32,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:32,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:32,185 INFO L628 ElimStorePlain]: treesize reduction 26, result has 70.5 percent of original size [2021-06-12 20:19:32,185 INFO L518 ElimStorePlain]: Eliminatee v_prenex_246 vanished before elimination [2021-06-12 20:19:32,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:32,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:32,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:32,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:19:32,212 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:95, output treesize:58 [2021-06-12 20:19:32,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:32,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:32,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:32,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:32,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:32,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:32,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:32,293 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:32,361 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-12 20:19:32,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:32,365 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:32,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:32,368 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:32,418 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-12 20:19:32,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:19:32,420 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-12 20:19:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:32,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372301707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:32,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:32,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:19:32,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268409561] [2021-06-12 20:19:32,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:19:32,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:32,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:19:32,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:19:32,496 INFO L87 Difference]: Start difference. First operand 1736 states and 6061 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:32,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:32,917 INFO L93 Difference]: Finished difference Result 2012 states and 6773 transitions. [2021-06-12 20:19:32,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:19:32,917 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:32,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:32,920 INFO L225 Difference]: With dead ends: 2012 [2021-06-12 20:19:32,920 INFO L226 Difference]: Without dead ends: 1947 [2021-06-12 20:19:32,920 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 443.4ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:19:32,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2021-06-12 20:19:32,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1705. [2021-06-12 20:19:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1705 states, 1704 states have (on average 3.466549295774648) internal successors, (5907), 1704 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 5907 transitions. [2021-06-12 20:19:32,938 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 5907 transitions. Word has length 24 [2021-06-12 20:19:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:32,938 INFO L482 AbstractCegarLoop]: Abstraction has 1705 states and 5907 transitions. [2021-06-12 20:19:32,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:32,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 5907 transitions. [2021-06-12 20:19:32,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:32,940 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:32,940 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:33,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6612,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:33,141 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:33,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:33,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1554633626, now seen corresponding path program 298 times [2021-06-12 20:19:33,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:33,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070550042] [2021-06-12 20:19:33,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:33,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:33,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070550042] [2021-06-12 20:19:33,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070550042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:33,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767482718] [2021-06-12 20:19:33,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:33,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:19:33,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:33,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:33,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:33,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767482718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:33,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:33,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-12 20:19:33,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299174813] [2021-06-12 20:19:33,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:19:33,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:33,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:19:33,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:19:33,620 INFO L87 Difference]: Start difference. First operand 1705 states and 5907 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:34,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:34,474 INFO L93 Difference]: Finished difference Result 1993 states and 6667 transitions. [2021-06-12 20:19:34,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:19:34,474 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:34,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:34,477 INFO L225 Difference]: With dead ends: 1993 [2021-06-12 20:19:34,477 INFO L226 Difference]: Without dead ends: 1894 [2021-06-12 20:19:34,478 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 696.7ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:19:34,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-06-12 20:19:34,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1654. [2021-06-12 20:19:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.468844525105868) internal successors, (5734), 1653 states have internal predecessors, (5734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5734 transitions. [2021-06-12 20:19:34,495 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5734 transitions. Word has length 24 [2021-06-12 20:19:34,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:34,495 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5734 transitions. [2021-06-12 20:19:34,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:34,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5734 transitions. [2021-06-12 20:19:34,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:34,497 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:34,497 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:34,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6631 [2021-06-12 20:19:34,697 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:34,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:34,698 INFO L82 PathProgramCache]: Analyzing trace with hash 377554566, now seen corresponding path program 299 times [2021-06-12 20:19:34,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:34,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457096843] [2021-06-12 20:19:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:34,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:34,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457096843] [2021-06-12 20:19:34,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457096843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:34,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444157840] [2021-06-12 20:19:34,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:34,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:19:34,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:34,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:34,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:34,936 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:19:34,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:34,958 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-12 20:19:34,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:34,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:34,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:34,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:19:34,971 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-12 20:19:35,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:35,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:35,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:19:35,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:35,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:35,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:35,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:35,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:35,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:35,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:35,058 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:35,084 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-12 20:19:35,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:19:35,085 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-12 20:19:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:35,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444157840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:35,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:35,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-12 20:19:35,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023294940] [2021-06-12 20:19:35,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:19:35,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:35,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:19:35,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:19:35,130 INFO L87 Difference]: Start difference. First operand 1654 states and 5734 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:35,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:35,545 INFO L93 Difference]: Finished difference Result 1946 states and 6629 transitions. [2021-06-12 20:19:35,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:19:35,545 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:35,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:35,547 INFO L225 Difference]: With dead ends: 1946 [2021-06-12 20:19:35,547 INFO L226 Difference]: Without dead ends: 1877 [2021-06-12 20:19:35,548 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 335.6ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:19:35,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-06-12 20:19:35,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1700. [2021-06-12 20:19:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 3.472042377869335) internal successors, (5899), 1699 states have internal predecessors, (5899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:35,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 5899 transitions. [2021-06-12 20:19:35,565 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 5899 transitions. Word has length 24 [2021-06-12 20:19:35,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:35,565 INFO L482 AbstractCegarLoop]: Abstraction has 1700 states and 5899 transitions. [2021-06-12 20:19:35,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:35,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 5899 transitions. [2021-06-12 20:19:35,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:35,567 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:35,567 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:35,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6650,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:35,767 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:35,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:35,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1553045210, now seen corresponding path program 300 times [2021-06-12 20:19:35,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:35,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966274026] [2021-06-12 20:19:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:35,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:35,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966274026] [2021-06-12 20:19:35,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966274026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:35,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657515679] [2021-06-12 20:19:35,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:35,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:19:35,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:35,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:35,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:36,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:36,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:36,034 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-12 20:19:36,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:19:36,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-12 20:19:36,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:36,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:36,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:36,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:36,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:19:36,126 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:36,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:36,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:36,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:36,134 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:36,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:19:36,137 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:36,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:36,140 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:36,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:36,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:36,187 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:36,255 INFO L628 ElimStorePlain]: treesize reduction 20, result has 80.0 percent of original size [2021-06-12 20:19:36,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:36,258 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:36,317 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.1 percent of original size [2021-06-12 20:19:36,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:36,320 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:36,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:36,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:36,350 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:36,388 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.8 percent of original size [2021-06-12 20:19:36,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:19:36,389 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 6 variables, input treesize:169, output treesize:34 [2021-06-12 20:19:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:36,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657515679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:36,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:36,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:19:36,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872935361] [2021-06-12 20:19:36,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:19:36,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:36,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:19:36,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:19:36,462 INFO L87 Difference]: Start difference. First operand 1700 states and 5899 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:36,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:36,970 INFO L93 Difference]: Finished difference Result 2113 states and 7156 transitions. [2021-06-12 20:19:36,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:19:36,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:36,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:36,974 INFO L225 Difference]: With dead ends: 2113 [2021-06-12 20:19:36,974 INFO L226 Difference]: Without dead ends: 2053 [2021-06-12 20:19:36,975 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 379.8ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:19:36,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-12 20:19:36,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1734. [2021-06-12 20:19:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.500288517022504) internal successors, (6066), 1733 states have internal predecessors, (6066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:37,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 6066 transitions. [2021-06-12 20:19:37,000 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 6066 transitions. Word has length 24 [2021-06-12 20:19:37,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:37,000 INFO L482 AbstractCegarLoop]: Abstraction has 1734 states and 6066 transitions. [2021-06-12 20:19:37,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:37,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 6066 transitions. [2021-06-12 20:19:37,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:37,003 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:37,003 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:37,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6657,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:37,225 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:37,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:37,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1128355352, now seen corresponding path program 301 times [2021-06-12 20:19:37,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:37,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296907345] [2021-06-12 20:19:37,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:37,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:37,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296907345] [2021-06-12 20:19:37,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296907345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:37,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830121662] [2021-06-12 20:19:37,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:37,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:37,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:37,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:37,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:38,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:38,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-06-12 20:19:38,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2021-06-12 20:19:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:38,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830121662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:38,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:38,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-12 20:19:38,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512515470] [2021-06-12 20:19:38,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:19:38,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:38,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:19:38,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:19:38,250 INFO L87 Difference]: Start difference. First operand 1734 states and 6066 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:41,030 WARN L205 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-06-12 20:19:41,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:41,070 INFO L93 Difference]: Finished difference Result 2180 states and 7268 transitions. [2021-06-12 20:19:41,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:19:41,070 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:41,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:41,074 INFO L225 Difference]: With dead ends: 2180 [2021-06-12 20:19:41,074 INFO L226 Difference]: Without dead ends: 2099 [2021-06-12 20:19:41,075 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2413.5ms TimeCoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:19:41,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2021-06-12 20:19:41,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 1670. [2021-06-12 20:19:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4625524266027563) internal successors, (5779), 1669 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:41,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5779 transitions. [2021-06-12 20:19:41,099 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5779 transitions. Word has length 24 [2021-06-12 20:19:41,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:41,099 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5779 transitions. [2021-06-12 20:19:41,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:41,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5779 transitions. [2021-06-12 20:19:41,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:41,102 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:41,102 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:41,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6672 [2021-06-12 20:19:41,315 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:41,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:41,315 INFO L82 PathProgramCache]: Analyzing trace with hash -661450490, now seen corresponding path program 302 times [2021-06-12 20:19:41,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:41,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746963848] [2021-06-12 20:19:41,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:41,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:41,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746963848] [2021-06-12 20:19:41,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746963848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:41,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183043709] [2021-06-12 20:19:41,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:41,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:19:41,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:41,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:41,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:41,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:41,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:41,737 INFO L628 ElimStorePlain]: treesize reduction 53, result has 62.4 percent of original size [2021-06-12 20:19:41,738 INFO L518 ElimStorePlain]: Eliminatee v_prenex_253 vanished before elimination [2021-06-12 20:19:41,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:41,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:41,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:41,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:41,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:41,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:41,785 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:41,837 INFO L628 ElimStorePlain]: treesize reduction 19, result has 75.3 percent of original size [2021-06-12 20:19:41,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:19:41,838 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:144, output treesize:58 [2021-06-12 20:19:41,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:41,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:41,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:41,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:41,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:41,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:41,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:41,932 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:42,011 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-12 20:19:42,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:42,015 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:42,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:42,018 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:42,076 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-12 20:19:42,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:19:42,077 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-12 20:19:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:42,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183043709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:42,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:42,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:19:42,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595017424] [2021-06-12 20:19:42,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:19:42,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:42,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:19:42,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:19:42,166 INFO L87 Difference]: Start difference. First operand 1670 states and 5779 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:42,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:42,717 INFO L93 Difference]: Finished difference Result 1989 states and 6754 transitions. [2021-06-12 20:19:42,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:19:42,718 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:42,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:42,721 INFO L225 Difference]: With dead ends: 1989 [2021-06-12 20:19:42,721 INFO L226 Difference]: Without dead ends: 1929 [2021-06-12 20:19:42,721 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 473.7ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:19:42,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-06-12 20:19:42,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1716. [2021-06-12 20:19:42,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 3.4903790087463555) internal successors, (5986), 1715 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5986 transitions. [2021-06-12 20:19:42,746 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5986 transitions. Word has length 24 [2021-06-12 20:19:42,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:42,746 INFO L482 AbstractCegarLoop]: Abstraction has 1716 states and 5986 transitions. [2021-06-12 20:19:42,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:42,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5986 transitions. [2021-06-12 20:19:42,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:42,749 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:42,749 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:42,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6710,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:42,961 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:42,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:42,961 INFO L82 PathProgramCache]: Analyzing trace with hash 952116244, now seen corresponding path program 303 times [2021-06-12 20:19:42,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:42,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855808660] [2021-06-12 20:19:42,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:43,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:43,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855808660] [2021-06-12 20:19:43,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855808660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:43,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358158238] [2021-06-12 20:19:43,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:43,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:19:43,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:43,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:43,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:43,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358158238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:43,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:43,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-12 20:19:43,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913741503] [2021-06-12 20:19:43,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:19:43,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:43,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:19:43,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:19:43,546 INFO L87 Difference]: Start difference. First operand 1716 states and 5986 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:45,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:45,224 INFO L93 Difference]: Finished difference Result 2227 states and 7324 transitions. [2021-06-12 20:19:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:19:45,225 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:45,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:45,227 INFO L225 Difference]: With dead ends: 2227 [2021-06-12 20:19:45,227 INFO L226 Difference]: Without dead ends: 2115 [2021-06-12 20:19:45,227 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1300.0ms TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:19:45,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-06-12 20:19:45,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1673. [2021-06-12 20:19:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 3.4671052631578947) internal successors, (5797), 1672 states have internal predecessors, (5797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5797 transitions. [2021-06-12 20:19:45,245 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5797 transitions. Word has length 24 [2021-06-12 20:19:45,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:45,245 INFO L482 AbstractCegarLoop]: Abstraction has 1673 states and 5797 transitions. [2021-06-12 20:19:45,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:45,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5797 transitions. [2021-06-12 20:19:45,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:45,247 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:45,247 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:45,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6726 [2021-06-12 20:19:45,447 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:45,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:45,448 INFO L82 PathProgramCache]: Analyzing trace with hash -591340454, now seen corresponding path program 304 times [2021-06-12 20:19:45,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:45,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079756343] [2021-06-12 20:19:45,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:45,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:45,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079756343] [2021-06-12 20:19:45,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079756343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:45,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124621022] [2021-06-12 20:19:45,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:45,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:19:45,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:45,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:45,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:45,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124621022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:45,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:45,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-12 20:19:45,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98338003] [2021-06-12 20:19:45,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:19:45,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:45,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:19:45,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:19:45,927 INFO L87 Difference]: Start difference. First operand 1673 states and 5797 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:48,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:48,082 INFO L93 Difference]: Finished difference Result 2322 states and 7662 transitions. [2021-06-12 20:19:48,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 20:19:48,082 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:48,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:48,086 INFO L225 Difference]: With dead ends: 2322 [2021-06-12 20:19:48,086 INFO L226 Difference]: Without dead ends: 2172 [2021-06-12 20:19:48,086 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1776.7ms TimeCoverageRelationStatistics Valid=411, Invalid=3011, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 20:19:48,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-12 20:19:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1686. [2021-06-12 20:19:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.4949554896142434) internal successors, (5889), 1685 states have internal predecessors, (5889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:48,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5889 transitions. [2021-06-12 20:19:48,105 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5889 transitions. Word has length 24 [2021-06-12 20:19:48,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:48,105 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 5889 transitions. [2021-06-12 20:19:48,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:48,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5889 transitions. [2021-06-12 20:19:48,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:48,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:48,107 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:48,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6751 [2021-06-12 20:19:48,308 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:48,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:48,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1349954870, now seen corresponding path program 305 times [2021-06-12 20:19:48,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:48,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788213206] [2021-06-12 20:19:48,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:48,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:48,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788213206] [2021-06-12 20:19:48,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788213206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:48,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790896311] [2021-06-12 20:19:48,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:48,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:19:48,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:48,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:48,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:19:48,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790896311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:48,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:48,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-06-12 20:19:48,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116568692] [2021-06-12 20:19:48,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:19:48,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:48,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:19:48,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:19:48,829 INFO L87 Difference]: Start difference. First operand 1686 states and 5889 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:50,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:50,862 INFO L93 Difference]: Finished difference Result 2053 states and 6839 transitions. [2021-06-12 20:19:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 20:19:50,862 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:50,865 INFO L225 Difference]: With dead ends: 2053 [2021-06-12 20:19:50,865 INFO L226 Difference]: Without dead ends: 1920 [2021-06-12 20:19:50,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1601.5ms TimeCoverageRelationStatistics Valid=399, Invalid=2793, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:19:50,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-06-12 20:19:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1672. [2021-06-12 20:19:50,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.485338120885697) internal successors, (5824), 1671 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:50,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5824 transitions. [2021-06-12 20:19:50,883 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5824 transitions. Word has length 24 [2021-06-12 20:19:50,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:50,884 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 5824 transitions. [2021-06-12 20:19:50,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:50,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5824 transitions. [2021-06-12 20:19:50,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:50,885 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:50,885 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:51,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6769 [2021-06-12 20:19:51,086 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:51,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1601280286, now seen corresponding path program 306 times [2021-06-12 20:19:51,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:51,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832303799] [2021-06-12 20:19:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:51,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:51,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832303799] [2021-06-12 20:19:51,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832303799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:51,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99397416] [2021-06-12 20:19:51,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:51,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:19:51,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:51,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:51,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:51,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-12 20:19:51,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:51,430 INFO L628 ElimStorePlain]: treesize reduction 63, result has 61.3 percent of original size [2021-06-12 20:19:51,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:19:51,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:51,489 INFO L628 ElimStorePlain]: treesize reduction 21, result has 77.7 percent of original size [2021-06-12 20:19:51,489 INFO L518 ElimStorePlain]: Eliminatee v_prenex_257 vanished before elimination [2021-06-12 20:19:51,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:19:51,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:51,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-12 20:19:51,497 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:51,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:51,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:19:51,521 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:168, output treesize:62 [2021-06-12 20:19:51,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:51,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:51,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:51,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:51,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:51,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:51,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:51,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:51,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:19:51,684 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-12 20:19:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:19:51,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99397416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:51,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:51,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:19:51,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78667287] [2021-06-12 20:19:51,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:19:51,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:51,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:19:51,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:19:51,710 INFO L87 Difference]: Start difference. First operand 1672 states and 5824 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:52,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:52,296 INFO L93 Difference]: Finished difference Result 1974 states and 6688 transitions. [2021-06-12 20:19:52,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:19:52,296 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:52,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:52,299 INFO L225 Difference]: With dead ends: 1974 [2021-06-12 20:19:52,299 INFO L226 Difference]: Without dead ends: 1899 [2021-06-12 20:19:52,299 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 539.5ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:19:52,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-06-12 20:19:52,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1672. [2021-06-12 20:19:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.473967684021544) internal successors, (5805), 1671 states have internal predecessors, (5805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:52,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5805 transitions. [2021-06-12 20:19:52,316 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5805 transitions. Word has length 24 [2021-06-12 20:19:52,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:52,316 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 5805 transitions. [2021-06-12 20:19:52,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:52,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5805 transitions. [2021-06-12 20:19:52,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:52,332 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:52,332 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:52,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6785 [2021-06-12 20:19:52,533 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:52,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:52,533 INFO L82 PathProgramCache]: Analyzing trace with hash -308120276, now seen corresponding path program 307 times [2021-06-12 20:19:52,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:52,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723162721] [2021-06-12 20:19:52,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:19:52,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:52,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723162721] [2021-06-12 20:19:52,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723162721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:52,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463984607] [2021-06-12 20:19:52,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:52,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:19:52,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:52,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-12 20:19:52,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:52,879 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.3 percent of original size [2021-06-12 20:19:52,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:19:52,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:52,956 INFO L628 ElimStorePlain]: treesize reduction 21, result has 77.7 percent of original size [2021-06-12 20:19:52,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:19:52,961 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:52,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:52,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-12 20:19:52,997 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:53,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:53,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:19:53,028 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:111, output treesize:62 [2021-06-12 20:19:53,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:19:53,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:53,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:53,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:53,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:53,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:19:53,193 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:19:53,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:19:53,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:19:53,210 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-12 20:19:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:19:53,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463984607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:53,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:53,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:19:53,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056168790] [2021-06-12 20:19:53,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:19:53,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:53,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:19:53,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:19:53,240 INFO L87 Difference]: Start difference. First operand 1672 states and 5805 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:54,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:54,080 INFO L93 Difference]: Finished difference Result 1887 states and 6401 transitions. [2021-06-12 20:19:54,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:19:54,080 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:54,083 INFO L225 Difference]: With dead ends: 1887 [2021-06-12 20:19:54,083 INFO L226 Difference]: Without dead ends: 1794 [2021-06-12 20:19:54,083 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 726.5ms TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:19:54,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2021-06-12 20:19:54,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1670. [2021-06-12 20:19:54,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4661473936488916) internal successors, (5785), 1669 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:54,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5785 transitions. [2021-06-12 20:19:54,101 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5785 transitions. Word has length 24 [2021-06-12 20:19:54,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:54,101 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5785 transitions. [2021-06-12 20:19:54,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:54,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5785 transitions. [2021-06-12 20:19:54,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:54,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:54,103 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:54,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6799,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:54,303 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:54,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:54,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1902468142, now seen corresponding path program 308 times [2021-06-12 20:19:54,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:54,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049663599] [2021-06-12 20:19:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:54,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:54,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049663599] [2021-06-12 20:19:54,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049663599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:54,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163587988] [2021-06-12 20:19:54,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:54,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:19:54,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:54,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:19:54,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:19:54,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163587988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:54,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:54,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-12 20:19:54,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920683733] [2021-06-12 20:19:54,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:19:54,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:54,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:19:54,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:19:54,799 INFO L87 Difference]: Start difference. First operand 1670 states and 5785 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:56,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:19:56,726 INFO L93 Difference]: Finished difference Result 2329 states and 7648 transitions. [2021-06-12 20:19:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:19:56,726 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:19:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:19:56,729 INFO L225 Difference]: With dead ends: 2329 [2021-06-12 20:19:56,729 INFO L226 Difference]: Without dead ends: 2138 [2021-06-12 20:19:56,729 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1520.4ms TimeCoverageRelationStatistics Valid=309, Invalid=2447, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:19:56,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-12 20:19:56,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1693. [2021-06-12 20:19:56,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1692 states have (on average 3.4680851063829787) internal successors, (5868), 1692 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 5868 transitions. [2021-06-12 20:19:56,750 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 5868 transitions. Word has length 24 [2021-06-12 20:19:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:19:56,750 INFO L482 AbstractCegarLoop]: Abstraction has 1693 states and 5868 transitions. [2021-06-12 20:19:56,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:19:56,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 5868 transitions. [2021-06-12 20:19:56,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:19:56,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:19:56,752 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:19:56,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6816 [2021-06-12 20:19:56,953 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:19:56,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:19:56,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1695049814, now seen corresponding path program 309 times [2021-06-12 20:19:56,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:19:56,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201129077] [2021-06-12 20:19:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:19:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:19:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:19:57,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:19:57,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201129077] [2021-06-12 20:19:57,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201129077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:57,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162325091] [2021-06-12 20:19:57,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:19:57,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:19:57,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:19:57,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:19:57,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:19:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:19:58,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162325091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:19:58,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:19:58,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-12 20:19:58,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667703846] [2021-06-12 20:19:58,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:19:58,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:19:58,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:19:58,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:19:58,327 INFO L87 Difference]: Start difference. First operand 1693 states and 5868 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:01,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:01,835 INFO L93 Difference]: Finished difference Result 2838 states and 9112 transitions. [2021-06-12 20:20:01,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 20:20:01,836 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:01,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:01,839 INFO L225 Difference]: With dead ends: 2838 [2021-06-12 20:20:01,839 INFO L226 Difference]: Without dead ends: 2628 [2021-06-12 20:20:01,840 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 3629.5ms TimeCoverageRelationStatistics Valid=471, Invalid=3435, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 20:20:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2021-06-12 20:20:01,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 1719. [2021-06-12 20:20:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 3.470896391152503) internal successors, (5963), 1718 states have internal predecessors, (5963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:01,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5963 transitions. [2021-06-12 20:20:01,861 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5963 transitions. Word has length 24 [2021-06-12 20:20:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:01,861 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 5963 transitions. [2021-06-12 20:20:01,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5963 transitions. [2021-06-12 20:20:01,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:01,864 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:01,864 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:02,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6822,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:02,085 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:02,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:02,085 INFO L82 PathProgramCache]: Analyzing trace with hash 887134254, now seen corresponding path program 310 times [2021-06-12 20:20:02,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:02,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014625942] [2021-06-12 20:20:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:02,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:02,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:02,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014625942] [2021-06-12 20:20:02,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014625942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:02,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121170671] [2021-06-12 20:20:02,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:02,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:20:02,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:02,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:20:02,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:20:02,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121170671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:02,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:02,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-12 20:20:02,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097472035] [2021-06-12 20:20:02,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:20:02,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:02,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:20:02,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:20:02,670 INFO L87 Difference]: Start difference. First operand 1719 states and 5963 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:04,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:04,488 INFO L93 Difference]: Finished difference Result 2452 states and 8102 transitions. [2021-06-12 20:20:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:20:04,488 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:04,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:04,492 INFO L225 Difference]: With dead ends: 2452 [2021-06-12 20:20:04,492 INFO L226 Difference]: Without dead ends: 2337 [2021-06-12 20:20:04,492 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1451.2ms TimeCoverageRelationStatistics Valid=336, Invalid=2420, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 20:20:04,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2021-06-12 20:20:04,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 1751. [2021-06-12 20:20:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 3.4977142857142858) internal successors, (6121), 1750 states have internal predecessors, (6121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 6121 transitions. [2021-06-12 20:20:04,515 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 6121 transitions. Word has length 24 [2021-06-12 20:20:04,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:04,515 INFO L482 AbstractCegarLoop]: Abstraction has 1751 states and 6121 transitions. [2021-06-12 20:20:04,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:04,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 6121 transitions. [2021-06-12 20:20:04,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:04,517 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:04,517 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:04,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6830,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:04,718 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:04,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:04,718 INFO L82 PathProgramCache]: Analyzing trace with hash -660978942, now seen corresponding path program 311 times [2021-06-12 20:20:04,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:04,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735212786] [2021-06-12 20:20:04,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:20:04,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:04,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735212786] [2021-06-12 20:20:04,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735212786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:04,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831923780] [2021-06-12 20:20:04,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:05,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:20:05,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:05,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:20:05,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:05,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831923780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:05,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:05,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-12 20:20:05,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683111494] [2021-06-12 20:20:05,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:20:05,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:05,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:20:05,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:20:05,242 INFO L87 Difference]: Start difference. First operand 1751 states and 6121 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:07,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:07,572 INFO L93 Difference]: Finished difference Result 2641 states and 8576 transitions. [2021-06-12 20:20:07,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 20:20:07,572 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:07,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:07,576 INFO L225 Difference]: With dead ends: 2641 [2021-06-12 20:20:07,576 INFO L226 Difference]: Without dead ends: 2503 [2021-06-12 20:20:07,576 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1821.7ms TimeCoverageRelationStatistics Valid=406, Invalid=3134, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:20:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2021-06-12 20:20:07,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1670. [2021-06-12 20:20:07,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1669 states have (on average 3.4661473936488916) internal successors, (5785), 1669 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:07,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 5785 transitions. [2021-06-12 20:20:07,599 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 5785 transitions. Word has length 24 [2021-06-12 20:20:07,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:07,599 INFO L482 AbstractCegarLoop]: Abstraction has 1670 states and 5785 transitions. [2021-06-12 20:20:07,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:07,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 5785 transitions. [2021-06-12 20:20:07,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:07,601 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:07,601 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:07,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6838,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:07,802 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:07,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:07,802 INFO L82 PathProgramCache]: Analyzing trace with hash 848323318, now seen corresponding path program 312 times [2021-06-12 20:20:07,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:07,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570747938] [2021-06-12 20:20:07,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:07,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:07,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570747938] [2021-06-12 20:20:07,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570747938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:07,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117482176] [2021-06-12 20:20:07,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:08,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:20:08,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:08,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:20:08,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:20:08,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117482176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:08,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:08,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 20:20:08,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945456533] [2021-06-12 20:20:08,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:20:08,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:08,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:20:08,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:20:08,351 INFO L87 Difference]: Start difference. First operand 1670 states and 5785 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:10,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:10,494 INFO L93 Difference]: Finished difference Result 2977 states and 9542 transitions. [2021-06-12 20:20:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 20:20:10,494 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:10,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:10,498 INFO L225 Difference]: With dead ends: 2977 [2021-06-12 20:20:10,498 INFO L226 Difference]: Without dead ends: 2740 [2021-06-12 20:20:10,498 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1754.5ms TimeCoverageRelationStatistics Valid=367, Invalid=2939, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 20:20:10,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-06-12 20:20:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1677. [2021-06-12 20:20:10,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 3.4665871121718377) internal successors, (5810), 1676 states have internal predecessors, (5810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:10,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5810 transitions. [2021-06-12 20:20:10,520 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5810 transitions. Word has length 24 [2021-06-12 20:20:10,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:10,520 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5810 transitions. [2021-06-12 20:20:10,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:10,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5810 transitions. [2021-06-12 20:20:10,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:10,522 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:10,522 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:10,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6846 [2021-06-12 20:20:10,723 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:10,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:10,723 INFO L82 PathProgramCache]: Analyzing trace with hash -864459910, now seen corresponding path program 313 times [2021-06-12 20:20:10,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:10,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539128120] [2021-06-12 20:20:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:10,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:10,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539128120] [2021-06-12 20:20:10,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539128120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:10,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446695894] [2021-06-12 20:20:10,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:10,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:20:10,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:20:11,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446695894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:11,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:11,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 20:20:11,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882272122] [2021-06-12 20:20:11,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:20:11,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:11,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:20:11,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:20:11,133 INFO L87 Difference]: Start difference. First operand 1677 states and 5810 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:12,685 INFO L93 Difference]: Finished difference Result 2771 states and 9108 transitions. [2021-06-12 20:20:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:20:12,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:12,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:12,689 INFO L225 Difference]: With dead ends: 2771 [2021-06-12 20:20:12,689 INFO L226 Difference]: Without dead ends: 2606 [2021-06-12 20:20:12,690 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1015.6ms TimeCoverageRelationStatistics Valid=305, Invalid=2347, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:20:12,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-06-12 20:20:12,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 1683. [2021-06-12 20:20:12,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.4863258026159336) internal successors, (5864), 1682 states have internal predecessors, (5864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5864 transitions. [2021-06-12 20:20:12,713 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5864 transitions. Word has length 24 [2021-06-12 20:20:12,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:12,713 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5864 transitions. [2021-06-12 20:20:12,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:12,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5864 transitions. [2021-06-12 20:20:12,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:12,715 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:12,715 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:12,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6854,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:12,916 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:12,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:12,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1186831674, now seen corresponding path program 314 times [2021-06-12 20:20:12,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:12,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628318998] [2021-06-12 20:20:12,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:12,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:12,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628318998] [2021-06-12 20:20:12,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628318998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:12,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268518467] [2021-06-12 20:20:12,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:13,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:20:13,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:13,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:13,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:13,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268518467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:13,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:13,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:20:13,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936690112] [2021-06-12 20:20:13,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:20:13,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:13,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:20:13,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:20:13,351 INFO L87 Difference]: Start difference. First operand 1683 states and 5864 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:13,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:13,609 INFO L93 Difference]: Finished difference Result 1907 states and 6473 transitions. [2021-06-12 20:20:13,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:20:13,609 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:13,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:13,612 INFO L225 Difference]: With dead ends: 1907 [2021-06-12 20:20:13,612 INFO L226 Difference]: Without dead ends: 1832 [2021-06-12 20:20:13,612 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 310.5ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:20:13,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-06-12 20:20:13,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1627. [2021-06-12 20:20:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 3.458179581795818) internal successors, (5623), 1626 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 5623 transitions. [2021-06-12 20:20:13,632 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 5623 transitions. Word has length 24 [2021-06-12 20:20:13,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:13,632 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 5623 transitions. [2021-06-12 20:20:13,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:13,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 5623 transitions. [2021-06-12 20:20:13,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:13,634 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:13,634 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:13,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6862 [2021-06-12 20:20:13,834 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:13,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:13,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1721159154, now seen corresponding path program 315 times [2021-06-12 20:20:13,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:13,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667781482] [2021-06-12 20:20:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:14,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:14,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:14,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667781482] [2021-06-12 20:20:14,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667781482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:14,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718237499] [2021-06-12 20:20:14,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:14,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:20:14,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:14,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:14,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:14,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718237499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:14,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:14,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-12 20:20:14,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2838795] [2021-06-12 20:20:14,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:20:14,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:14,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:20:14,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:20:14,372 INFO L87 Difference]: Start difference. First operand 1627 states and 5623 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:17,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:17,434 INFO L93 Difference]: Finished difference Result 2439 states and 7890 transitions. [2021-06-12 20:20:17,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 20:20:17,435 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:17,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:17,438 INFO L225 Difference]: With dead ends: 2439 [2021-06-12 20:20:17,438 INFO L226 Difference]: Without dead ends: 2225 [2021-06-12 20:20:17,439 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 2645.8ms TimeCoverageRelationStatistics Valid=715, Invalid=4115, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 20:20:17,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-06-12 20:20:17,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 1621. [2021-06-12 20:20:17,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.45) internal successors, (5589), 1620 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5589 transitions. [2021-06-12 20:20:17,460 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5589 transitions. Word has length 24 [2021-06-12 20:20:17,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:17,460 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5589 transitions. [2021-06-12 20:20:17,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:17,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5589 transitions. [2021-06-12 20:20:17,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:17,462 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:17,462 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:17,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6887,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:17,663 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:17,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:17,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1073438964, now seen corresponding path program 316 times [2021-06-12 20:20:17,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:17,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026051942] [2021-06-12 20:20:17,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:17,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:17,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:17,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026051942] [2021-06-12 20:20:17,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026051942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:17,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299746083] [2021-06-12 20:20:17,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:17,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:20:17,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:17,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:17,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:17,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:17,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:17,992 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-06-12 20:20:17,992 INFO L518 ElimStorePlain]: Eliminatee v_prenex_261 vanished before elimination [2021-06-12 20:20:17,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:20:17,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-12 20:20:18,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:18,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:18,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:20:18,050 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:18,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:18,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:18,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:20:18,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:18,077 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:18,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:18,080 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:18,110 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-12 20:20:18,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:20:18,111 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-12 20:20:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:18,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299746083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:18,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:18,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-12 20:20:18,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893195527] [2021-06-12 20:20:18,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:20:18,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:18,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:20:18,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:20:18,163 INFO L87 Difference]: Start difference. First operand 1621 states and 5589 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:18,457 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2021-06-12 20:20:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:19,351 INFO L93 Difference]: Finished difference Result 1957 states and 6615 transitions. [2021-06-12 20:20:19,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:20:19,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:19,354 INFO L225 Difference]: With dead ends: 1957 [2021-06-12 20:20:19,355 INFO L226 Difference]: Without dead ends: 1888 [2021-06-12 20:20:19,355 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 743.3ms TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:20:19,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-06-12 20:20:19,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1651. [2021-06-12 20:20:19,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.4593939393939395) internal successors, (5708), 1650 states have internal predecessors, (5708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:19,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5708 transitions. [2021-06-12 20:20:19,380 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5708 transitions. Word has length 24 [2021-06-12 20:20:19,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:19,380 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5708 transitions. [2021-06-12 20:20:19,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:19,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5708 transitions. [2021-06-12 20:20:19,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:19,383 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:19,383 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:19,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6899,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:19,605 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:19,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:19,605 INFO L82 PathProgramCache]: Analyzing trace with hash -2046037688, now seen corresponding path program 317 times [2021-06-12 20:20:19,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:19,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054484329] [2021-06-12 20:20:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:19,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:19,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054484329] [2021-06-12 20:20:19,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054484329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:19,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52782194] [2021-06-12 20:20:19,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:19,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:20:19,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:19,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:19,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:19,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:19,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:19,918 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-06-12 20:20:19,918 INFO L518 ElimStorePlain]: Eliminatee v_prenex_262 vanished before elimination [2021-06-12 20:20:19,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:20:19,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-12 20:20:20,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:20,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:20,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:20,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:20,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:20,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:20,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:20,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:20,081 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:20:20,082 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:20,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:20:20,085 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:20,179 INFO L628 ElimStorePlain]: treesize reduction 43, result has 67.4 percent of original size [2021-06-12 20:20:20,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:20,184 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:20,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:20,188 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:20,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:20,192 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:20,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:20,196 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:20,267 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.3 percent of original size [2021-06-12 20:20:20,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:20,272 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:20,352 INFO L628 ElimStorePlain]: treesize reduction 19, result has 72.5 percent of original size [2021-06-12 20:20:20,352 INFO L518 ElimStorePlain]: Eliminatee v_prenex_263 vanished before elimination [2021-06-12 20:20:20,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:20:20,355 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:201, output treesize:34 [2021-06-12 20:20:20,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:20,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52782194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:20,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:20,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:20:20,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476023779] [2021-06-12 20:20:20,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:20:20,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:20,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:20:20,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:20:20,456 INFO L87 Difference]: Start difference. First operand 1651 states and 5708 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:21,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:21,195 INFO L93 Difference]: Finished difference Result 2130 states and 7161 transitions. [2021-06-12 20:20:21,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:20:21,195 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:21,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:21,199 INFO L225 Difference]: With dead ends: 2130 [2021-06-12 20:20:21,199 INFO L226 Difference]: Without dead ends: 2070 [2021-06-12 20:20:21,199 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 552.1ms TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:20:21,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-06-12 20:20:21,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1684. [2021-06-12 20:20:21,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.4878193701723115) internal successors, (5870), 1683 states have internal predecessors, (5870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5870 transitions. [2021-06-12 20:20:21,226 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5870 transitions. Word has length 24 [2021-06-12 20:20:21,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:21,226 INFO L482 AbstractCegarLoop]: Abstraction has 1684 states and 5870 transitions. [2021-06-12 20:20:21,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5870 transitions. [2021-06-12 20:20:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:21,228 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:21,228 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:21,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6906 [2021-06-12 20:20:21,453 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:21,453 INFO L82 PathProgramCache]: Analyzing trace with hash -432470954, now seen corresponding path program 318 times [2021-06-12 20:20:21,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:21,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673858878] [2021-06-12 20:20:21,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:21,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:21,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:21,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673858878] [2021-06-12 20:20:21,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673858878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:21,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055284211] [2021-06-12 20:20:21,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:21,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:20:21,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:21,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:21,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:21,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:21,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:21,976 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-12 20:20:21,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:20:21,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-12 20:20:22,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:22,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:22,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:22,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:22,164 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:20:22,165 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:22,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:20:22,168 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:22,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:22,172 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:22,301 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-06-12 20:20:22,302 INFO L628 ElimStorePlain]: treesize reduction 24, result has 72.1 percent of original size [2021-06-12 20:20:22,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:22,306 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:22,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:22,310 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:22,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:22,314 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:22,363 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-12 20:20:22,364 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-12 20:20:22,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:20:22,365 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:146, output treesize:34 [2021-06-12 20:20:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:22,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055284211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:22,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:22,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-12 20:20:22,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160166866] [2021-06-12 20:20:22,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:20:22,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:22,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:20:22,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:20:22,450 INFO L87 Difference]: Start difference. First operand 1684 states and 5870 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:23,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:23,419 INFO L93 Difference]: Finished difference Result 2020 states and 6804 transitions. [2021-06-12 20:20:23,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:20:23,420 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:23,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:23,423 INFO L225 Difference]: With dead ends: 2020 [2021-06-12 20:20:23,423 INFO L226 Difference]: Without dead ends: 1953 [2021-06-12 20:20:23,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 698.2ms TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:20:23,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-06-12 20:20:23,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1623. [2021-06-12 20:20:23,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 3.4494451294697903) internal successors, (5595), 1622 states have internal predecessors, (5595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:23,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5595 transitions. [2021-06-12 20:20:23,449 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5595 transitions. Word has length 24 [2021-06-12 20:20:23,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:23,449 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 5595 transitions. [2021-06-12 20:20:23,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:23,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5595 transitions. [2021-06-12 20:20:23,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:23,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:23,452 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:23,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6936,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:23,665 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:23,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:23,665 INFO L82 PathProgramCache]: Analyzing trace with hash 34433908, now seen corresponding path program 319 times [2021-06-12 20:20:23,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:23,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159573585] [2021-06-12 20:20:23,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:23,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:23,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159573585] [2021-06-12 20:20:23,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159573585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:23,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002370257] [2021-06-12 20:20:23,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:23,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:23,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:24,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:24,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002370257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:24,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:24,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-12 20:20:24,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120405582] [2021-06-12 20:20:24,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:20:24,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:24,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:20:24,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:20:24,169 INFO L87 Difference]: Start difference. First operand 1623 states and 5595 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:26,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:26,602 INFO L93 Difference]: Finished difference Result 2438 states and 7938 transitions. [2021-06-12 20:20:26,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 20:20:26,603 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:26,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:26,606 INFO L225 Difference]: With dead ends: 2438 [2021-06-12 20:20:26,606 INFO L226 Difference]: Without dead ends: 2254 [2021-06-12 20:20:26,606 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 1946.3ms TimeCoverageRelationStatistics Valid=574, Invalid=4682, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 20:20:26,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-12 20:20:26,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1641. [2021-06-12 20:20:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1640 states have (on average 3.479878048780488) internal successors, (5707), 1640 states have internal predecessors, (5707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:26,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 5707 transitions. [2021-06-12 20:20:26,627 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 5707 transitions. Word has length 24 [2021-06-12 20:20:26,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:26,627 INFO L482 AbstractCegarLoop]: Abstraction has 1641 states and 5707 transitions. [2021-06-12 20:20:26,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:26,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 5707 transitions. [2021-06-12 20:20:26,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:26,629 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:26,629 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:26,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6965,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:26,830 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:26,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:26,830 INFO L82 PathProgramCache]: Analyzing trace with hash 104543944, now seen corresponding path program 320 times [2021-06-12 20:20:26,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:26,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56636800] [2021-06-12 20:20:26,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:27,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:27,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56636800] [2021-06-12 20:20:27,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56636800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:27,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933284077] [2021-06-12 20:20:27,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:27,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:20:27,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:27,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:27,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:27,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:20:27,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:27,355 INFO L628 ElimStorePlain]: treesize reduction 58, result has 55.7 percent of original size [2021-06-12 20:20:27,355 INFO L518 ElimStorePlain]: Eliminatee v_prenex_266 vanished before elimination [2021-06-12 20:20:27,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:20:27,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:27,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:20:27,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-12 20:20:27,392 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:27,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:20:27,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:20:27,418 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:137, output treesize:62 [2021-06-12 20:20:27,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:27,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:27,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:27,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:27,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:27,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:27,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:27,553 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:27,621 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-12 20:20:27,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:27,624 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:27,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:27,627 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:27,682 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-12 20:20:27,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:20:27,683 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-12 20:20:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:27,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933284077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:27,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:27,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2021-06-12 20:20:27,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326706787] [2021-06-12 20:20:27,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:20:27,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:27,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:20:27,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:20:27,770 INFO L87 Difference]: Start difference. First operand 1641 states and 5707 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:29,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:29,881 INFO L93 Difference]: Finished difference Result 2328 states and 7668 transitions. [2021-06-12 20:20:29,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 20:20:29,881 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:29,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:29,884 INFO L225 Difference]: With dead ends: 2328 [2021-06-12 20:20:29,884 INFO L226 Difference]: Without dead ends: 2208 [2021-06-12 20:20:29,885 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 1750.0ms TimeCoverageRelationStatistics Valid=507, Invalid=3275, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 20:20:29,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-06-12 20:20:29,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 1656. [2021-06-12 20:20:29,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.4924471299093653) internal successors, (5780), 1655 states have internal predecessors, (5780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:29,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 5780 transitions. [2021-06-12 20:20:29,904 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 5780 transitions. Word has length 24 [2021-06-12 20:20:29,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:29,904 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 5780 transitions. [2021-06-12 20:20:29,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:29,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 5780 transitions. [2021-06-12 20:20:29,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:29,906 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:29,906 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:30,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6974,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:30,107 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:30,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:30,107 INFO L82 PathProgramCache]: Analyzing trace with hash 353509398, now seen corresponding path program 321 times [2021-06-12 20:20:30,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:30,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909399475] [2021-06-12 20:20:30,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:30,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:30,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909399475] [2021-06-12 20:20:30,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909399475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:30,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068302884] [2021-06-12 20:20:30,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:30,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:20:30,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:30,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:30,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:30,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068302884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:30,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:30,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-12 20:20:30,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887416034] [2021-06-12 20:20:30,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:20:30,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:30,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:20:30,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:20:30,605 INFO L87 Difference]: Start difference. First operand 1656 states and 5780 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:32,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:32,652 INFO L93 Difference]: Finished difference Result 2232 states and 7426 transitions. [2021-06-12 20:20:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 20:20:32,652 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:32,655 INFO L225 Difference]: With dead ends: 2232 [2021-06-12 20:20:32,655 INFO L226 Difference]: Without dead ends: 2058 [2021-06-12 20:20:32,655 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 1605.7ms TimeCoverageRelationStatistics Valid=372, Invalid=3410, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 20:20:32,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-06-12 20:20:32,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1654. [2021-06-12 20:20:32,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.4827586206896552) internal successors, (5757), 1653 states have internal predecessors, (5757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:32,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5757 transitions. [2021-06-12 20:20:32,674 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5757 transitions. Word has length 24 [2021-06-12 20:20:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:32,674 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5757 transitions. [2021-06-12 20:20:32,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:32,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5757 transitions. [2021-06-12 20:20:32,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:32,676 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:32,676 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:32,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6985,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:32,876 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:32,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:32,876 INFO L82 PathProgramCache]: Analyzing trace with hash 643781646, now seen corresponding path program 322 times [2021-06-12 20:20:32,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:32,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756006740] [2021-06-12 20:20:32,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:32,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:32,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756006740] [2021-06-12 20:20:32,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756006740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:32,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263703524] [2021-06-12 20:20:32,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:33,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:20:33,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:33,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:33,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:33,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:33,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:33,150 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:20:33,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:33,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:33,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:33,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:20:33,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:33,173 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:33,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:33,176 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:33,202 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-12 20:20:33,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:20:33,203 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-12 20:20:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:33,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263703524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:33,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:33,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-06-12 20:20:33,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207343525] [2021-06-12 20:20:33,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:20:33,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:33,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:20:33,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:20:33,250 INFO L87 Difference]: Start difference. First operand 1654 states and 5757 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:33,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:33,953 INFO L93 Difference]: Finished difference Result 1923 states and 6557 transitions. [2021-06-12 20:20:33,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:20:33,954 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:33,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:33,956 INFO L225 Difference]: With dead ends: 1923 [2021-06-12 20:20:33,956 INFO L226 Difference]: Without dead ends: 1845 [2021-06-12 20:20:33,956 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 551.7ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:20:33,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1845 states. [2021-06-12 20:20:33,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1845 to 1635. [2021-06-12 20:20:33,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 3.4871481028151776) internal successors, (5698), 1634 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 5698 transitions. [2021-06-12 20:20:33,974 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 5698 transitions. Word has length 24 [2021-06-12 20:20:33,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:33,974 INFO L482 AbstractCegarLoop]: Abstraction has 1635 states and 5698 transitions. [2021-06-12 20:20:33,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:33,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 5698 transitions. [2021-06-12 20:20:33,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:33,976 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:33,976 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:34,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6994 [2021-06-12 20:20:34,176 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:34,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:34,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1570714054, now seen corresponding path program 323 times [2021-06-12 20:20:34,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:34,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271016426] [2021-06-12 20:20:34,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:34,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:34,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271016426] [2021-06-12 20:20:34,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271016426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:34,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702421508] [2021-06-12 20:20:34,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:34,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:20:34,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:34,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:34,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:34,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:34,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:34,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:34,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:34,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:34,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:34,503 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-12 20:20:34,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:34,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:34,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:34,508 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:34,534 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-12 20:20:34,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:20:34,535 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-12 20:20:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:34,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702421508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:34,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:34,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-12 20:20:34,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422010582] [2021-06-12 20:20:34,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:20:34,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:34,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:20:34,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:20:34,580 INFO L87 Difference]: Start difference. First operand 1635 states and 5698 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:35,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:35,292 INFO L93 Difference]: Finished difference Result 2066 states and 7013 transitions. [2021-06-12 20:20:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:20:35,292 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:35,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:35,295 INFO L225 Difference]: With dead ends: 2066 [2021-06-12 20:20:35,295 INFO L226 Difference]: Without dead ends: 1997 [2021-06-12 20:20:35,295 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 512.8ms TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:20:35,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2021-06-12 20:20:35,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1662. [2021-06-12 20:20:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.4942805538832027) internal successors, (5804), 1661 states have internal predecessors, (5804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:35,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5804 transitions. [2021-06-12 20:20:35,317 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5804 transitions. Word has length 24 [2021-06-12 20:20:35,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:35,318 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5804 transitions. [2021-06-12 20:20:35,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:35,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5804 transitions. [2021-06-12 20:20:35,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:35,320 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:35,320 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:35,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7000,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:35,536 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:35,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:35,536 INFO L82 PathProgramCache]: Analyzing trace with hash -395223410, now seen corresponding path program 324 times [2021-06-12 20:20:35,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:35,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232987839] [2021-06-12 20:20:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:35,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:35,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232987839] [2021-06-12 20:20:35,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232987839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:35,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142117286] [2021-06-12 20:20:35,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:35,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:20:35,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:35,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:35,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:35,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142117286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:35,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:35,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:20:35,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661198768] [2021-06-12 20:20:35,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:20:35,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:35,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:20:35,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:20:35,888 INFO L87 Difference]: Start difference. First operand 1662 states and 5804 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:36,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:36,584 INFO L93 Difference]: Finished difference Result 2132 states and 7230 transitions. [2021-06-12 20:20:36,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:20:36,584 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:36,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:36,587 INFO L225 Difference]: With dead ends: 2132 [2021-06-12 20:20:36,587 INFO L226 Difference]: Without dead ends: 2072 [2021-06-12 20:20:36,587 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:20:36,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-06-12 20:20:36,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1695. [2021-06-12 20:20:36,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1694 states have (on average 3.52125147579693) internal successors, (5965), 1694 states have internal predecessors, (5965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:36,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 5965 transitions. [2021-06-12 20:20:36,606 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 5965 transitions. Word has length 24 [2021-06-12 20:20:36,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:36,606 INFO L482 AbstractCegarLoop]: Abstraction has 1695 states and 5965 transitions. [2021-06-12 20:20:36,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:36,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 5965 transitions. [2021-06-12 20:20:36,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:36,608 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:36,608 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:36,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7007 [2021-06-12 20:20:36,808 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:36,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:36,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1218343324, now seen corresponding path program 325 times [2021-06-12 20:20:36,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:36,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977921853] [2021-06-12 20:20:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:36,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:36,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977921853] [2021-06-12 20:20:36,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977921853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:36,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644215322] [2021-06-12 20:20:36,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:37,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:37,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:37,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644215322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:37,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:37,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:20:37,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576984964] [2021-06-12 20:20:37,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:20:37,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:37,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:20:37,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:20:37,186 INFO L87 Difference]: Start difference. First operand 1695 states and 5965 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:37,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:37,865 INFO L93 Difference]: Finished difference Result 1988 states and 6783 transitions. [2021-06-12 20:20:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:20:37,866 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:37,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:37,868 INFO L225 Difference]: With dead ends: 1988 [2021-06-12 20:20:37,868 INFO L226 Difference]: Without dead ends: 1919 [2021-06-12 20:20:37,869 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 416.5ms TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:20:37,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-06-12 20:20:37,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1622. [2021-06-12 20:20:37,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.4818013571869217) internal successors, (5644), 1621 states have internal predecessors, (5644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5644 transitions. [2021-06-12 20:20:37,885 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5644 transitions. Word has length 24 [2021-06-12 20:20:37,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:37,885 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5644 transitions. [2021-06-12 20:20:37,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:37,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5644 transitions. [2021-06-12 20:20:37,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:37,887 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:37,887 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:38,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7016 [2021-06-12 20:20:38,088 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:38,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:38,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1500604018, now seen corresponding path program 326 times [2021-06-12 20:20:38,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:38,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455278117] [2021-06-12 20:20:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:38,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:38,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455278117] [2021-06-12 20:20:38,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455278117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:38,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888350626] [2021-06-12 20:20:38,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:38,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:20:38,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:38,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:38,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:38,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:38,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:38,356 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-12 20:20:38,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:20:38,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:20 [2021-06-12 20:20:38,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:38,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:38,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:38,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:38,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:38,402 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:38,438 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-12 20:20:38,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:38,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:38,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:38,443 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:38,469 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-12 20:20:38,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:20:38,470 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-12 20:20:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:38,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888350626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:38,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:38,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-12 20:20:38,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679224152] [2021-06-12 20:20:38,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:20:38,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:38,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:20:38,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:20:38,516 INFO L87 Difference]: Start difference. First operand 1622 states and 5644 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:39,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:39,194 INFO L93 Difference]: Finished difference Result 1893 states and 6482 transitions. [2021-06-12 20:20:39,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:20:39,195 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:39,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:39,197 INFO L225 Difference]: With dead ends: 1893 [2021-06-12 20:20:39,197 INFO L226 Difference]: Without dead ends: 1824 [2021-06-12 20:20:39,197 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 476.4ms TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:20:39,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-06-12 20:20:39,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1651. [2021-06-12 20:20:39,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.4903030303030302) internal successors, (5759), 1650 states have internal predecessors, (5759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:39,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5759 transitions. [2021-06-12 20:20:39,214 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5759 transitions. Word has length 24 [2021-06-12 20:20:39,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:39,214 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5759 transitions. [2021-06-12 20:20:39,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:39,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5759 transitions. [2021-06-12 20:20:39,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:39,216 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:39,216 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:39,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7025,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:39,417 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:39,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:39,417 INFO L82 PathProgramCache]: Analyzing trace with hash -325113374, now seen corresponding path program 327 times [2021-06-12 20:20:39,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:39,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472934426] [2021-06-12 20:20:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:39,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:39,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472934426] [2021-06-12 20:20:39,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472934426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:39,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986181083] [2021-06-12 20:20:39,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:39,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:20:39,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:39,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:39,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:39,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:20:39,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:39,745 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-12 20:20:39,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:39,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:39,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:20:39,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:20:39,760 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-12 20:20:39,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:39,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:39,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:39,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:39,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:20:39,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:40,000 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:20:40,000 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:40,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:20:40,004 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:40,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:40,008 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:40,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:40,013 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:40,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:20:40,016 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:40,107 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.8 percent of original size [2021-06-12 20:20:40,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:40,112 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:40,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:40,115 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:40,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:40,119 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:40,185 INFO L628 ElimStorePlain]: treesize reduction 21, result has 70.4 percent of original size [2021-06-12 20:20:40,185 INFO L518 ElimStorePlain]: Eliminatee v_prenex_270 vanished before elimination [2021-06-12 20:20:40,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:20:40,186 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 4 variables, input treesize:201, output treesize:34 [2021-06-12 20:20:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:40,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986181083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:40,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:40,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:20:40,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247901111] [2021-06-12 20:20:40,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:20:40,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:40,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:20:40,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:20:40,281 INFO L87 Difference]: Start difference. First operand 1651 states and 5759 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:41,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:41,055 INFO L93 Difference]: Finished difference Result 2065 states and 7023 transitions. [2021-06-12 20:20:41,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:20:41,055 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:41,058 INFO L225 Difference]: With dead ends: 2065 [2021-06-12 20:20:41,058 INFO L226 Difference]: Without dead ends: 2005 [2021-06-12 20:20:41,058 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 610.0ms TimeCoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:20:41,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2021-06-12 20:20:41,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 1683. [2021-06-12 20:20:41,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1682 states have (on average 3.5172413793103448) internal successors, (5916), 1682 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 5916 transitions. [2021-06-12 20:20:41,078 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 5916 transitions. Word has length 24 [2021-06-12 20:20:41,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:41,078 INFO L482 AbstractCegarLoop]: Abstraction has 1683 states and 5916 transitions. [2021-06-12 20:20:41,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 5916 transitions. [2021-06-12 20:20:41,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:41,080 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:41,080 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:41,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7032 [2021-06-12 20:20:41,281 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:41,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:41,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1288453360, now seen corresponding path program 328 times [2021-06-12 20:20:41,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:41,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625118354] [2021-06-12 20:20:41,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:42,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:42,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625118354] [2021-06-12 20:20:42,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625118354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:42,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224496653] [2021-06-12 20:20:42,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:42,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:20:42,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:42,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:42,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:42,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:42,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:42,414 INFO L628 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2021-06-12 20:20:42,414 INFO L518 ElimStorePlain]: Eliminatee v_prenex_271 vanished before elimination [2021-06-12 20:20:42,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:20:42,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-12 20:20:42,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:42,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:42,674 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-06-12 20:20:42,674 INFO L628 ElimStorePlain]: treesize reduction 95, result has 49.7 percent of original size [2021-06-12 20:20:42,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:42,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:42,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:42,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:42,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:42,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:42,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:42,688 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:42,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:20:42,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:42,725 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:42,906 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2021-06-12 20:20:42,906 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.1 percent of original size [2021-06-12 20:20:42,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:42,910 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:42,964 INFO L628 ElimStorePlain]: treesize reduction 16, result has 76.8 percent of original size [2021-06-12 20:20:42,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:42,969 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:42,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:20:42,994 INFO L518 ElimStorePlain]: Eliminatee v_prenex_273 vanished before elimination [2021-06-12 20:20:42,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:20:42,995 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:192, output treesize:34 [2021-06-12 20:20:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:43,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224496653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:43,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:43,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:20:43,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992928790] [2021-06-12 20:20:43,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:20:43,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:43,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:20:43,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:20:43,089 INFO L87 Difference]: Start difference. First operand 1683 states and 5916 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:44,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:44,126 INFO L93 Difference]: Finished difference Result 1987 states and 6778 transitions. [2021-06-12 20:20:44,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:20:44,127 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:44,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:44,129 INFO L225 Difference]: With dead ends: 1987 [2021-06-12 20:20:44,130 INFO L226 Difference]: Without dead ends: 1920 [2021-06-12 20:20:44,130 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1421.4ms TimeCoverageRelationStatistics Valid=180, Invalid=1152, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:20:44,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-06-12 20:20:44,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1620. [2021-06-12 20:20:44,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.4793082149474985) internal successors, (5633), 1619 states have internal predecessors, (5633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:44,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5633 transitions. [2021-06-12 20:20:44,155 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5633 transitions. Word has length 24 [2021-06-12 20:20:44,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:44,155 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5633 transitions. [2021-06-12 20:20:44,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:44,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5633 transitions. [2021-06-12 20:20:44,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:44,158 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:44,158 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:44,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7098 [2021-06-12 20:20:44,361 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:44,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:44,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1849886158, now seen corresponding path program 329 times [2021-06-12 20:20:44,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:44,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084429547] [2021-06-12 20:20:44,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:44,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:44,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084429547] [2021-06-12 20:20:44,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084429547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:44,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881035039] [2021-06-12 20:20:44,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:44,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:20:44,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:44,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:44,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:44,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:44,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:44,707 INFO L628 ElimStorePlain]: treesize reduction 48, result has 57.5 percent of original size [2021-06-12 20:20:44,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:44,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:44,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:20:44,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:44,738 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:44,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:20:44,762 INFO L518 ElimStorePlain]: Eliminatee ends_with_10 vanished before elimination [2021-06-12 20:20:44,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:20:44,763 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:117, output treesize:58 [2021-06-12 20:20:44,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:44,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:44,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:44,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:44,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:20:44,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:44,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:44,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:20:44,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:20:44,886 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-12 20:20:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:44,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881035039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:44,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:44,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 20:20:44,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102614399] [2021-06-12 20:20:44,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:20:44,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:44,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:20:44,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:20:44,923 INFO L87 Difference]: Start difference. First operand 1620 states and 5633 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:45,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:45,754 INFO L93 Difference]: Finished difference Result 1842 states and 6264 transitions. [2021-06-12 20:20:45,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:20:45,754 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:45,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:45,756 INFO L225 Difference]: With dead ends: 1842 [2021-06-12 20:20:45,756 INFO L226 Difference]: Without dead ends: 1767 [2021-06-12 20:20:45,757 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 579.4ms TimeCoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:20:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-06-12 20:20:45,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1620. [2021-06-12 20:20:45,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.465101914762199) internal successors, (5610), 1619 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:45,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5610 transitions. [2021-06-12 20:20:45,773 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5610 transitions. Word has length 24 [2021-06-12 20:20:45,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:45,773 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5610 transitions. [2021-06-12 20:20:45,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:45,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5610 transitions. [2021-06-12 20:20:45,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:45,775 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:45,775 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:45,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7128,331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:45,976 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:45,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:45,976 INFO L82 PathProgramCache]: Analyzing trace with hash 672807098, now seen corresponding path program 330 times [2021-06-12 20:20:45,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:45,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955451900] [2021-06-12 20:20:45,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:46,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:46,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955451900] [2021-06-12 20:20:46,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955451900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:46,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169839843] [2021-06-12 20:20:46,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:46,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:20:46,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:46,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:46,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:46,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:20:46,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:46,251 INFO L628 ElimStorePlain]: treesize reduction 2, result has 92.3 percent of original size [2021-06-12 20:20:46,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:46,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:46,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:20:46,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:20:46,263 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-12 20:20:46,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:46,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:46,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:46,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:46,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:46,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:46,351 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-12 20:20:46,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:46,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:46,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:46,357 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:46,383 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.0 percent of original size [2021-06-12 20:20:46,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:20:46,384 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:19 [2021-06-12 20:20:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:46,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169839843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:46,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:46,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-12 20:20:46,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314230594] [2021-06-12 20:20:46,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:20:46,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:46,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:20:46,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:20:46,431 INFO L87 Difference]: Start difference. First operand 1620 states and 5610 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:47,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:47,082 INFO L93 Difference]: Finished difference Result 1843 states and 6268 transitions. [2021-06-12 20:20:47,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:20:47,082 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:47,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:47,084 INFO L225 Difference]: With dead ends: 1843 [2021-06-12 20:20:47,084 INFO L226 Difference]: Without dead ends: 1774 [2021-06-12 20:20:47,085 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 450.0ms TimeCoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:20:47,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1774 states. [2021-06-12 20:20:47,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1774 to 1601. [2021-06-12 20:20:47,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 3.465625) internal successors, (5545), 1600 states have internal predecessors, (5545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:47,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 5545 transitions. [2021-06-12 20:20:47,101 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 5545 transitions. Word has length 24 [2021-06-12 20:20:47,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:47,101 INFO L482 AbstractCegarLoop]: Abstraction has 1601 states and 5545 transitions. [2021-06-12 20:20:47,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:47,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 5545 transitions. [2021-06-12 20:20:47,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:47,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:47,103 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:47,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7140,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:47,303 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:47,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:47,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1848297742, now seen corresponding path program 331 times [2021-06-12 20:20:47,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:47,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740197899] [2021-06-12 20:20:47,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:47,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:47,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740197899] [2021-06-12 20:20:47,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740197899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:47,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266862082] [2021-06-12 20:20:47,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:47,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:47,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:47,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266862082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:47,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:47,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-12 20:20:47,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992554321] [2021-06-12 20:20:47,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:20:47,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:47,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:20:47,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:20:47,758 INFO L87 Difference]: Start difference. First operand 1601 states and 5545 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:49,683 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-06-12 20:20:50,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:50,272 INFO L93 Difference]: Finished difference Result 2411 states and 7945 transitions. [2021-06-12 20:20:50,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 20:20:50,272 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:50,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:50,275 INFO L225 Difference]: With dead ends: 2411 [2021-06-12 20:20:50,275 INFO L226 Difference]: Without dead ends: 2263 [2021-06-12 20:20:50,276 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 1972.2ms TimeCoverageRelationStatistics Valid=543, Invalid=4149, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 20:20:50,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-06-12 20:20:50,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 1593. [2021-06-12 20:20:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.4673366834170856) internal successors, (5520), 1592 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5520 transitions. [2021-06-12 20:20:50,296 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5520 transitions. Word has length 24 [2021-06-12 20:20:50,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:50,296 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5520 transitions. [2021-06-12 20:20:50,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5520 transitions. [2021-06-12 20:20:50,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:50,298 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:50,298 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:50,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7147 [2021-06-12 20:20:50,498 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:50,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:50,499 INFO L82 PathProgramCache]: Analyzing trace with hash -366197958, now seen corresponding path program 332 times [2021-06-12 20:20:50,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:50,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631875468] [2021-06-12 20:20:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:50,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:50,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631875468] [2021-06-12 20:20:50,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631875468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:50,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678860881] [2021-06-12 20:20:50,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:50,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:20:50,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:50,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:50,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:50,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678860881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:50,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:50,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-12 20:20:50,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104179020] [2021-06-12 20:20:50,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:20:50,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:50,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:20:50,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:20:50,975 INFO L87 Difference]: Start difference. First operand 1593 states and 5520 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:51,925 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-06-12 20:20:52,739 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-06-12 20:20:54,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:54,484 INFO L93 Difference]: Finished difference Result 2287 states and 7567 transitions. [2021-06-12 20:20:54,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 20:20:54,485 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:54,488 INFO L225 Difference]: With dead ends: 2287 [2021-06-12 20:20:54,488 INFO L226 Difference]: Without dead ends: 2127 [2021-06-12 20:20:54,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 2811.5ms TimeCoverageRelationStatistics Valid=596, Invalid=4806, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 20:20:54,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-06-12 20:20:54,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1582. [2021-06-12 20:20:54,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.476913345983555) internal successors, (5497), 1581 states have internal predecessors, (5497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:54,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5497 transitions. [2021-06-12 20:20:54,515 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5497 transitions. Word has length 24 [2021-06-12 20:20:54,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:54,515 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 5497 transitions. [2021-06-12 20:20:54,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:54,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5497 transitions. [2021-06-12 20:20:54,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:54,517 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:54,517 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:54,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7154,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:54,741 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:54,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:54,741 INFO L82 PathProgramCache]: Analyzing trace with hash -296087922, now seen corresponding path program 333 times [2021-06-12 20:20:54,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:54,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078482868] [2021-06-12 20:20:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:54,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:54,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078482868] [2021-06-12 20:20:54,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078482868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:54,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915691687] [2021-06-12 20:20:54,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:55,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:20:55,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:55,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:55,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:55,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-12 20:20:55,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:55,151 INFO L628 ElimStorePlain]: treesize reduction 6, result has 94.3 percent of original size [2021-06-12 20:20:55,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:20:55,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:55,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:20:55,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-12 20:20:55,206 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:55,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:20:55,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:55,257 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-12 20:20:55,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:20:55,258 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:111, output treesize:62 [2021-06-12 20:20:55,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:55,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:55,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:55,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:55,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:55,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:55,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:55,375 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:55,443 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-12 20:20:55,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:55,447 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:55,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:55,450 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:55,500 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-12 20:20:55,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:20:55,501 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-12 20:20:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:55,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915691687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:55,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:55,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 20:20:55,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878104453] [2021-06-12 20:20:55,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:20:55,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:55,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:20:55,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:20:55,583 INFO L87 Difference]: Start difference. First operand 1582 states and 5497 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:56,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:56,414 INFO L93 Difference]: Finished difference Result 1916 states and 6490 transitions. [2021-06-12 20:20:56,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:20:56,415 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:56,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:56,417 INFO L225 Difference]: With dead ends: 1916 [2021-06-12 20:20:56,417 INFO L226 Difference]: Without dead ends: 1856 [2021-06-12 20:20:56,417 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 644.9ms TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:20:56,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-06-12 20:20:56,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1606. [2021-06-12 20:20:56,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 3.485981308411215) internal successors, (5595), 1605 states have internal predecessors, (5595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 5595 transitions. [2021-06-12 20:20:56,435 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 5595 transitions. Word has length 24 [2021-06-12 20:20:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:56,435 INFO L482 AbstractCegarLoop]: Abstraction has 1606 states and 5595 transitions. [2021-06-12 20:20:56,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:56,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 5595 transitions. [2021-06-12 20:20:56,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:56,437 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:56,437 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:56,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7164 [2021-06-12 20:20:56,638 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:56,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:56,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1317478812, now seen corresponding path program 334 times [2021-06-12 20:20:56,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:56,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890014598] [2021-06-12 20:20:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:56,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:56,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890014598] [2021-06-12 20:20:56,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890014598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:56,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670272978] [2021-06-12 20:20:56,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:56,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:20:56,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:56,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:56,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:56,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:20:56,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:56,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-12 20:20:56,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:56,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:20:56,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:56,980 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-06-12 20:20:56,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:20:56,983 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:57,043 INFO L628 ElimStorePlain]: treesize reduction 26, result has 72.0 percent of original size [2021-06-12 20:20:57,044 INFO L518 ElimStorePlain]: Eliminatee v_prenex_282 vanished before elimination [2021-06-12 20:20:57,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:20:57,044 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:142, output treesize:67 [2021-06-12 20:20:57,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:57,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:57,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:57,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:57,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:57,150 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:57,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:57,153 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:57,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:57,156 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:57,215 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.3 percent of original size [2021-06-12 20:20:57,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:57,219 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:57,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:57,221 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:57,260 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-06-12 20:20:57,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:20:57,261 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:111, output treesize:34 [2021-06-12 20:20:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:57,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670272978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:57,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:57,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 20:20:57,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354008291] [2021-06-12 20:20:57,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:20:57,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:57,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:20:57,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:20:57,336 INFO L87 Difference]: Start difference. First operand 1606 states and 5595 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:58,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:20:58,536 INFO L93 Difference]: Finished difference Result 1985 states and 6653 transitions. [2021-06-12 20:20:58,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:20:58,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:20:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:20:58,539 INFO L225 Difference]: With dead ends: 1985 [2021-06-12 20:20:58,539 INFO L226 Difference]: Without dead ends: 1906 [2021-06-12 20:20:58,539 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 881.5ms TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:20:58,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-06-12 20:20:58,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1545. [2021-06-12 20:20:58,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.461139896373057) internal successors, (5344), 1544 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:58,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5344 transitions. [2021-06-12 20:20:58,556 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5344 transitions. Word has length 24 [2021-06-12 20:20:58,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:20:58,556 INFO L482 AbstractCegarLoop]: Abstraction has 1545 states and 5344 transitions. [2021-06-12 20:20:58,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:20:58,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5344 transitions. [2021-06-12 20:20:58,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:20:58,558 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:20:58,558 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:20:58,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7180,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:58,758 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:20:58,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:20:58,759 INFO L82 PathProgramCache]: Analyzing trace with hash -201559986, now seen corresponding path program 335 times [2021-06-12 20:20:58,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:20:58,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462448976] [2021-06-12 20:20:58,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:20:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:20:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:20:58,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:20:58,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462448976] [2021-06-12 20:20:58,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462448976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:58,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548352652] [2021-06-12 20:20:58,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:20:58,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:20:58,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:20:58,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:20:58,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:20:59,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-12 20:20:59,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:59,141 INFO L628 ElimStorePlain]: treesize reduction 31, result has 81.3 percent of original size [2021-06-12 20:20:59,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-12 20:20:59,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:59,232 INFO L628 ElimStorePlain]: treesize reduction 6, result has 95.4 percent of original size [2021-06-12 20:20:59,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:20:59,236 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:59,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:20:59,239 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:59,289 INFO L628 ElimStorePlain]: treesize reduction 50, result has 55.4 percent of original size [2021-06-12 20:20:59,289 INFO L518 ElimStorePlain]: Eliminatee v_prenex_284 vanished before elimination [2021-06-12 20:20:59,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:20:59,290 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:171, output treesize:62 [2021-06-12 20:20:59,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:59,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:59,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:20:59,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:59,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:20:59,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:20:59,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:20:59,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:20:59,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:20:59,455 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-12 20:20:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:20:59,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548352652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:20:59,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:20:59,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 20:20:59,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949732600] [2021-06-12 20:20:59,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:20:59,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:20:59,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:20:59,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:20:59,490 INFO L87 Difference]: Start difference. First operand 1545 states and 5344 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:00,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:00,452 INFO L93 Difference]: Finished difference Result 1877 states and 6305 transitions. [2021-06-12 20:21:00,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:21:00,452 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:00,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:00,455 INFO L225 Difference]: With dead ends: 1877 [2021-06-12 20:21:00,455 INFO L226 Difference]: Without dead ends: 1800 [2021-06-12 20:21:00,455 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 750.5ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:21:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2021-06-12 20:21:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1534. [2021-06-12 20:21:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1533 states have (on average 3.4494455316373123) internal successors, (5288), 1533 states have internal predecessors, (5288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 5288 transitions. [2021-06-12 20:21:00,470 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 5288 transitions. Word has length 24 [2021-06-12 20:21:00,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:00,471 INFO L482 AbstractCegarLoop]: Abstraction has 1534 states and 5288 transitions. [2021-06-12 20:21:00,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:00,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 5288 transitions. [2021-06-12 20:21:00,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:00,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:00,472 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:00,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7197 [2021-06-12 20:21:00,673 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:00,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:00,673 INFO L82 PathProgramCache]: Analyzing trace with hash -47122468, now seen corresponding path program 336 times [2021-06-12 20:21:00,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:00,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388041663] [2021-06-12 20:21:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:00,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:00,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388041663] [2021-06-12 20:21:00,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388041663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:00,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350355600] [2021-06-12 20:21:00,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:00,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:21:00,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:00,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:21:00,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:00,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-12 20:21:00,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:01,012 INFO L628 ElimStorePlain]: treesize reduction 32, result has 75.8 percent of original size [2021-06-12 20:21:01,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:21:01,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:01,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:01,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:21:01,052 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:01,103 INFO L628 ElimStorePlain]: treesize reduction 21, result has 76.1 percent of original size [2021-06-12 20:21:01,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-12 20:21:01,106 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:01,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:01,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:21:01,131 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:137, output treesize:62 [2021-06-12 20:21:01,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:01,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:01,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:01,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:01,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:01,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:01,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:01,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:01,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:21:01,281 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-12 20:21:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:21:01,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350355600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:01,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:01,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 20:21:01,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141678557] [2021-06-12 20:21:01,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:21:01,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:01,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:21:01,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:21:01,317 INFO L87 Difference]: Start difference. First operand 1534 states and 5288 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:02,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:02,309 INFO L93 Difference]: Finished difference Result 1768 states and 5949 transitions. [2021-06-12 20:21:02,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:21:02,310 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:02,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:02,312 INFO L225 Difference]: With dead ends: 1768 [2021-06-12 20:21:02,312 INFO L226 Difference]: Without dead ends: 1677 [2021-06-12 20:21:02,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 740.7ms TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:21:02,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2021-06-12 20:21:02,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1513. [2021-06-12 20:21:02,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 3.447089947089947) internal successors, (5212), 1512 states have internal predecessors, (5212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:02,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 5212 transitions. [2021-06-12 20:21:02,327 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 5212 transitions. Word has length 24 [2021-06-12 20:21:02,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:02,328 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 5212 transitions. [2021-06-12 20:21:02,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:02,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 5212 transitions. [2021-06-12 20:21:02,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:02,329 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:02,329 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:02,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7211 [2021-06-12 20:21:02,530 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:02,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:02,530 INFO L82 PathProgramCache]: Analyzing trace with hash -841957494, now seen corresponding path program 337 times [2021-06-12 20:21:02,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:02,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034564623] [2021-06-12 20:21:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:02,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:02,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034564623] [2021-06-12 20:21:02,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034564623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:02,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478621263] [2021-06-12 20:21:02,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:02,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:21:02,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:02,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478621263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:02,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:02,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-12 20:21:02,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604202672] [2021-06-12 20:21:02,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:21:02,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:02,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:21:02,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:21:02,993 INFO L87 Difference]: Start difference. First operand 1513 states and 5212 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:05,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:05,500 INFO L93 Difference]: Finished difference Result 2288 states and 7400 transitions. [2021-06-12 20:21:05,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 20:21:05,500 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:05,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:05,503 INFO L225 Difference]: With dead ends: 2288 [2021-06-12 20:21:05,503 INFO L226 Difference]: Without dead ends: 2168 [2021-06-12 20:21:05,503 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 1907.0ms TimeCoverageRelationStatistics Valid=573, Invalid=3849, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 20:21:05,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-06-12 20:21:05,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1520. [2021-06-12 20:21:05,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1520 states, 1519 states have (on average 3.4476629361421987) internal successors, (5237), 1519 states have internal predecessors, (5237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:05,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1520 states to 1520 states and 5237 transitions. [2021-06-12 20:21:05,522 INFO L78 Accepts]: Start accepts. Automaton has 1520 states and 5237 transitions. Word has length 24 [2021-06-12 20:21:05,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:05,522 INFO L482 AbstractCegarLoop]: Abstraction has 1520 states and 5237 transitions. [2021-06-12 20:21:05,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:05,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1520 states and 5237 transitions. [2021-06-12 20:21:05,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:05,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:05,524 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:05,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7224 [2021-06-12 20:21:05,724 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:05,725 INFO L82 PathProgramCache]: Analyzing trace with hash 771609240, now seen corresponding path program 338 times [2021-06-12 20:21:05,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:05,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333201954] [2021-06-12 20:21:05,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:05,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:05,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333201954] [2021-06-12 20:21:05,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333201954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:05,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190479692] [2021-06-12 20:21:05,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:06,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:21:06,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:06,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:21:06,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:06,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190479692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:06,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:06,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-12 20:21:06,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196229221] [2021-06-12 20:21:06,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:21:06,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:06,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:21:06,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:21:06,319 INFO L87 Difference]: Start difference. First operand 1520 states and 5237 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:08,181 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-06-12 20:21:09,074 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-12 20:21:09,493 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-06-12 20:21:09,865 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2021-06-12 20:21:10,127 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-12 20:21:10,799 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-12 20:21:11,169 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-12 20:21:11,311 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-12 20:21:11,836 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-12 20:21:12,023 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-06-12 20:21:12,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:12,364 INFO L93 Difference]: Finished difference Result 3187 states and 9796 transitions. [2021-06-12 20:21:12,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-12 20:21:12,364 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:12,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:12,368 INFO L225 Difference]: With dead ends: 3187 [2021-06-12 20:21:12,368 INFO L226 Difference]: Without dead ends: 2927 [2021-06-12 20:21:12,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 5153.3ms TimeCoverageRelationStatistics Valid=1010, Invalid=7180, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 20:21:12,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2021-06-12 20:21:12,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 1494. [2021-06-12 20:21:12,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.4166108506363027) internal successors, (5101), 1493 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:12,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 5101 transitions. [2021-06-12 20:21:12,390 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 5101 transitions. Word has length 24 [2021-06-12 20:21:12,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:12,390 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 5101 transitions. [2021-06-12 20:21:12,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:12,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 5101 transitions. [2021-06-12 20:21:12,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:12,392 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:12,392 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:12,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7232 [2021-06-12 20:21:12,592 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:12,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:12,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1854467236, now seen corresponding path program 339 times [2021-06-12 20:21:12,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:12,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144901132] [2021-06-12 20:21:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:12,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:12,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144901132] [2021-06-12 20:21:12,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144901132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:12,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680964535] [2021-06-12 20:21:12,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:12,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:21:12,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:12,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:21:12,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:12,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:12,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:12,963 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.1 percent of original size [2021-06-12 20:21:12,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:12,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:13,034 INFO L628 ElimStorePlain]: treesize reduction 22, result has 79.8 percent of original size [2021-06-12 20:21:13,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:13,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:13,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:13,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:13,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:13,118 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-06-12 20:21:13,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-06-12 20:21:13,120 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:117, output treesize:61 [2021-06-12 20:21:13,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:13,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:13,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:21:13,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:21:13,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:13,356 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.8 percent of original size [2021-06-12 20:21:13,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:13,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:13,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:13,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:21:13,370 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:73, output treesize:11 [2021-06-12 20:21:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:13,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680964535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:13,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:13,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-12 20:21:13,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954538085] [2021-06-12 20:21:13,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:21:13,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:13,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:21:13,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:21:13,411 INFO L87 Difference]: Start difference. First operand 1494 states and 5101 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:14,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:14,800 INFO L93 Difference]: Finished difference Result 1883 states and 6189 transitions. [2021-06-12 20:21:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:21:14,800 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:14,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:14,803 INFO L225 Difference]: With dead ends: 1883 [2021-06-12 20:21:14,803 INFO L226 Difference]: Without dead ends: 1784 [2021-06-12 20:21:14,803 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1030.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:21:14,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-12 20:21:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1474. [2021-06-12 20:21:14,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 3.415478615071283) internal successors, (5031), 1473 states have internal predecessors, (5031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:14,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 5031 transitions. [2021-06-12 20:21:14,819 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 5031 transitions. Word has length 24 [2021-06-12 20:21:14,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:14,819 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 5031 transitions. [2021-06-12 20:21:14,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:14,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 5031 transitions. [2021-06-12 20:21:14,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:14,820 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:14,820 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:15,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7240 [2021-06-12 20:21:15,021 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:15,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:15,021 INFO L82 PathProgramCache]: Analyzing trace with hash 27651606, now seen corresponding path program 340 times [2021-06-12 20:21:15,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:15,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463543929] [2021-06-12 20:21:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:15,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:15,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463543929] [2021-06-12 20:21:15,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463543929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:15,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008496635] [2021-06-12 20:21:15,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:15,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:21:15,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:15,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:21:15,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:15,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-12 20:21:15,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:15,350 INFO L628 ElimStorePlain]: treesize reduction 63, result has 61.3 percent of original size [2021-06-12 20:21:15,351 INFO L518 ElimStorePlain]: Eliminatee v_prenex_297 vanished before elimination [2021-06-12 20:21:15,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:21:15,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:15,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-12 20:21:15,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:15,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:15,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:21:15,391 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:15,438 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-12 20:21:15,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:21:15,439 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:168, output treesize:62 [2021-06-12 20:21:15,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:15,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:15,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:15,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:15,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:15,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:15,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:15,563 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:15,631 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-12 20:21:15,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:15,634 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:15,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:15,637 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:15,687 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-12 20:21:15,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:21:15,688 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-12 20:21:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:15,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008496635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:15,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:15,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 20:21:15,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351781363] [2021-06-12 20:21:15,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:21:15,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:15,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:21:15,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:21:15,769 INFO L87 Difference]: Start difference. First operand 1474 states and 5031 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:16,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:16,939 INFO L93 Difference]: Finished difference Result 1848 states and 6050 transitions. [2021-06-12 20:21:16,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:21:16,939 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:16,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:16,941 INFO L225 Difference]: With dead ends: 1848 [2021-06-12 20:21:16,941 INFO L226 Difference]: Without dead ends: 1765 [2021-06-12 20:21:16,941 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 868.3ms TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:21:16,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-06-12 20:21:16,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1442. [2021-06-12 20:21:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3795975017349065) internal successors, (4870), 1441 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:16,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4870 transitions. [2021-06-12 20:21:16,957 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4870 transitions. Word has length 24 [2021-06-12 20:21:16,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:16,957 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4870 transitions. [2021-06-12 20:21:16,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:16,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4870 transitions. [2021-06-12 20:21:16,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:16,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:16,958 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:17,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7276,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:17,159 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:17,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:17,159 INFO L82 PathProgramCache]: Analyzing trace with hash 520247368, now seen corresponding path program 341 times [2021-06-12 20:21:17,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:17,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989430745] [2021-06-12 20:21:17,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:17,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:17,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989430745] [2021-06-12 20:21:17,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989430745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:17,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480758842] [2021-06-12 20:21:17,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:17,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:21:17,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:17,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:21:17,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:17,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-12 20:21:17,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:17,499 INFO L628 ElimStorePlain]: treesize reduction 63, result has 61.3 percent of original size [2021-06-12 20:21:17,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:21:17,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:17,558 INFO L628 ElimStorePlain]: treesize reduction 21, result has 77.7 percent of original size [2021-06-12 20:21:17,558 INFO L518 ElimStorePlain]: Eliminatee v_prenex_301 vanished before elimination [2021-06-12 20:21:17,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-06-12 20:21:17,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:17,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-06-12 20:21:17,564 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:17,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:17,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:21:17,589 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:168, output treesize:62 [2021-06-12 20:21:17,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:17,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:17,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:17,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:17,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:17,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:17,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:17,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:17,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:21:17,748 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:42, output treesize:16 [2021-06-12 20:21:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:17,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480758842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:17,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:17,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 20:21:17,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081869477] [2021-06-12 20:21:17,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:21:17,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:17,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:21:17,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:21:17,785 INFO L87 Difference]: Start difference. First operand 1442 states and 4870 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:18,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:18,858 INFO L93 Difference]: Finished difference Result 1760 states and 5793 transitions. [2021-06-12 20:21:18,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:21:18,859 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:18,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:18,861 INFO L225 Difference]: With dead ends: 1760 [2021-06-12 20:21:18,861 INFO L226 Difference]: Without dead ends: 1657 [2021-06-12 20:21:18,861 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 735.5ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:21:18,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-06-12 20:21:18,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1376. [2021-06-12 20:21:18,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 3.3767272727272726) internal successors, (4643), 1375 states have internal predecessors, (4643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:18,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 4643 transitions. [2021-06-12 20:21:18,875 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 4643 transitions. Word has length 24 [2021-06-12 20:21:18,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:18,875 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 4643 transitions. [2021-06-12 20:21:18,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:18,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 4643 transitions. [2021-06-12 20:21:18,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:18,877 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:18,877 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:19,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7291 [2021-06-12 20:21:19,077 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:19,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:19,078 INFO L82 PathProgramCache]: Analyzing trace with hash 326699018, now seen corresponding path program 342 times [2021-06-12 20:21:19,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:19,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200165459] [2021-06-12 20:21:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:19,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:19,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200165459] [2021-06-12 20:21:19,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200165459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:19,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837742701] [2021-06-12 20:21:19,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:19,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:21:19,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:19,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:21:19,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:19,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:19,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:19,418 INFO L628 ElimStorePlain]: treesize reduction 53, result has 55.1 percent of original size [2021-06-12 20:21:19,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:19,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:19,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:19,424 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:19,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:19,447 INFO L518 ElimStorePlain]: Eliminatee v_prenex_303 vanished before elimination [2021-06-12 20:21:19,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:21:19,448 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:122, output treesize:58 [2021-06-12 20:21:19,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:19,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:19,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:19,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:19,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:19,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:19,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:19,549 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:19,628 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.6 percent of original size [2021-06-12 20:21:19,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:19,631 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:19,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:19,634 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:19,710 INFO L628 ElimStorePlain]: treesize reduction 15, result has 79.7 percent of original size [2021-06-12 20:21:19,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:21:19,712 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:99, output treesize:43 [2021-06-12 20:21:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:19,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837742701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:19,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:19,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-12 20:21:19,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438138073] [2021-06-12 20:21:19,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:21:19,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:19,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:21:19,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:21:19,783 INFO L87 Difference]: Start difference. First operand 1376 states and 4643 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:20,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:20,516 INFO L93 Difference]: Finished difference Result 1650 states and 5378 transitions. [2021-06-12 20:21:20,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:21:20,517 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:20,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:20,519 INFO L225 Difference]: With dead ends: 1650 [2021-06-12 20:21:20,519 INFO L226 Difference]: Without dead ends: 1576 [2021-06-12 20:21:20,519 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 562.8ms TimeCoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:21:20,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-06-12 20:21:20,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1358. [2021-06-12 20:21:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1357 states have (on average 3.3559322033898304) internal successors, (4554), 1357 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 4554 transitions. [2021-06-12 20:21:20,534 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 4554 transitions. Word has length 24 [2021-06-12 20:21:20,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:20,534 INFO L482 AbstractCegarLoop]: Abstraction has 1358 states and 4554 transitions. [2021-06-12 20:21:20,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:20,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 4554 transitions. [2021-06-12 20:21:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:20,535 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:20,535 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:20,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7304,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:20,736 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:20,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:20,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1617240540, now seen corresponding path program 343 times [2021-06-12 20:21:20,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:20,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734421629] [2021-06-12 20:21:20,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:20,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:20,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734421629] [2021-06-12 20:21:20,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734421629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:20,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910728049] [2021-06-12 20:21:20,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:20,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:21:20,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:21,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:21,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:21,072 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-12 20:21:21,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:21,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:21,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:21,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:21,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:21,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:21,115 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:21,162 INFO L628 ElimStorePlain]: treesize reduction 19, result has 76.3 percent of original size [2021-06-12 20:21:21,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:21:21,163 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:95, output treesize:61 [2021-06-12 20:21:21,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:21,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:21,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:21,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:21,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:21,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:21,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:21,236 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:21,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:21,239 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:21,299 INFO L628 ElimStorePlain]: treesize reduction 19, result has 79.3 percent of original size [2021-06-12 20:21:21,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:21,303 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:21,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:21,305 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:21,344 INFO L628 ElimStorePlain]: treesize reduction 15, result has 76.9 percent of original size [2021-06-12 20:21:21,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:21:21,345 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:111, output treesize:34 [2021-06-12 20:21:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:21,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910728049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:21,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:21,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-12 20:21:21,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203674986] [2021-06-12 20:21:21,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:21:21,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:21,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:21:21,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:21:21,408 INFO L87 Difference]: Start difference. First operand 1358 states and 4554 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:22,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:22,349 INFO L93 Difference]: Finished difference Result 1627 states and 5306 transitions. [2021-06-12 20:21:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:21:22,349 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:22,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:22,351 INFO L225 Difference]: With dead ends: 1627 [2021-06-12 20:21:22,351 INFO L226 Difference]: Without dead ends: 1534 [2021-06-12 20:21:22,351 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 715.0ms TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:21:22,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-06-12 20:21:22,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1251. [2021-06-12 20:21:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.344) internal successors, (4180), 1250 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4180 transitions. [2021-06-12 20:21:22,365 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4180 transitions. Word has length 24 [2021-06-12 20:21:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:22,365 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 4180 transitions. [2021-06-12 20:21:22,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4180 transitions. [2021-06-12 20:21:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:22,366 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:22,366 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:22,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7318 [2021-06-12 20:21:22,567 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:22,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:22,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1252048260, now seen corresponding path program 344 times [2021-06-12 20:21:22,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:22,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099724629] [2021-06-12 20:21:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:22,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:22,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099724629] [2021-06-12 20:21:22,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099724629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:22,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037015231] [2021-06-12 20:21:22,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:22,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:21:22,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:22,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:21:22,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:22,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037015231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:22,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:22,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:21:22,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895392388] [2021-06-12 20:21:22,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:21:22,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:22,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:21:22,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:21:22,952 INFO L87 Difference]: Start difference. First operand 1251 states and 4180 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:23,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:23,149 INFO L93 Difference]: Finished difference Result 1572 states and 5105 transitions. [2021-06-12 20:21:23,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:21:23,150 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:23,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:23,152 INFO L225 Difference]: With dead ends: 1572 [2021-06-12 20:21:23,152 INFO L226 Difference]: Without dead ends: 1509 [2021-06-12 20:21:23,152 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:21:23,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-06-12 20:21:23,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1251. [2021-06-12 20:21:23,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.344) internal successors, (4180), 1250 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:23,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4180 transitions. [2021-06-12 20:21:23,165 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4180 transitions. Word has length 24 [2021-06-12 20:21:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:23,165 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 4180 transitions. [2021-06-12 20:21:23,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:23,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4180 transitions. [2021-06-12 20:21:23,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:23,167 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:23,167 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:23,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7337,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:23,367 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:23,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:23,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1133518474, now seen corresponding path program 345 times [2021-06-12 20:21:23,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:23,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399510431] [2021-06-12 20:21:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:23,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:23,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:23,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399510431] [2021-06-12 20:21:23,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399510431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:23,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789784594] [2021-06-12 20:21:23,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:23,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:21:23,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:23,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:21:23,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:23,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:23,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789784594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:23,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:23,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:21:23,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054526768] [2021-06-12 20:21:23,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:21:23,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:23,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:21:23,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:21:23,748 INFO L87 Difference]: Start difference. First operand 1251 states and 4180 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:23,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:23,901 INFO L93 Difference]: Finished difference Result 1425 states and 4662 transitions. [2021-06-12 20:21:23,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:21:23,901 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:23,903 INFO L225 Difference]: With dead ends: 1425 [2021-06-12 20:21:23,903 INFO L226 Difference]: Without dead ends: 1342 [2021-06-12 20:21:23,903 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:21:23,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-06-12 20:21:23,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1198. [2021-06-12 20:21:23,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.343358395989975) internal successors, (4002), 1197 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4002 transitions. [2021-06-12 20:21:23,915 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4002 transitions. Word has length 24 [2021-06-12 20:21:23,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:23,915 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4002 transitions. [2021-06-12 20:21:23,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:23,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4002 transitions. [2021-06-12 20:21:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:23,916 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:23,916 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:24,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7348,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:24,117 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:24,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:24,117 INFO L82 PathProgramCache]: Analyzing trace with hash 581879458, now seen corresponding path program 346 times [2021-06-12 20:21:24,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:24,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150441092] [2021-06-12 20:21:24,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:24,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:24,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150441092] [2021-06-12 20:21:24,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150441092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:24,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133723861] [2021-06-12 20:21:24,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:24,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:21:24,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:24,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:21:24,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:24,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:24,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:24,378 INFO L628 ElimStorePlain]: treesize reduction 2, result has 87.5 percent of original size [2021-06-12 20:21:24,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:21:24,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:14 [2021-06-12 20:21:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:24,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133723861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:24,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:24,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:21:24,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104375690] [2021-06-12 20:21:24,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:21:24,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:24,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:21:24,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:21:24,510 INFO L87 Difference]: Start difference. First operand 1198 states and 4002 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:24,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:24,660 INFO L93 Difference]: Finished difference Result 1478 states and 4858 transitions. [2021-06-12 20:21:24,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:21:24,660 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:24,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:24,662 INFO L225 Difference]: With dead ends: 1478 [2021-06-12 20:21:24,662 INFO L226 Difference]: Without dead ends: 1415 [2021-06-12 20:21:24,662 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:21:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-06-12 20:21:24,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1173. [2021-06-12 20:21:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.319965870307167) internal successors, (3891), 1172 states have internal predecessors, (3891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3891 transitions. [2021-06-12 20:21:24,674 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3891 transitions. Word has length 24 [2021-06-12 20:21:24,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:24,674 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3891 transitions. [2021-06-12 20:21:24,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:24,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3891 transitions. [2021-06-12 20:21:24,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:24,675 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:24,675 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:24,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7360,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:24,876 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:24,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:24,876 INFO L82 PathProgramCache]: Analyzing trace with hash -761852682, now seen corresponding path program 347 times [2021-06-12 20:21:24,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:24,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101871124] [2021-06-12 20:21:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:24,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:24,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101871124] [2021-06-12 20:21:24,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101871124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:24,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850173521] [2021-06-12 20:21:24,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:25,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:21:25,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:25,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:21:25,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:25,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:25,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:25,291 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-06-12 20:21:25,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:25,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:25,338 INFO L628 ElimStorePlain]: treesize reduction 38, result has 59.1 percent of original size [2021-06-12 20:21:25,338 INFO L518 ElimStorePlain]: Eliminatee v_prenex_308 vanished before elimination [2021-06-12 20:21:25,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:25,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:25,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:25,361 INFO L518 ElimStorePlain]: Eliminatee v_prenex_309 vanished before elimination [2021-06-12 20:21:25,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:21:25,362 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:102, output treesize:52 [2021-06-12 20:21:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:25,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850173521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:25,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:25,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:21:25,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194905290] [2021-06-12 20:21:25,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:21:25,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:25,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:21:25,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:21:25,469 INFO L87 Difference]: Start difference. First operand 1173 states and 3891 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:25,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:25,663 INFO L93 Difference]: Finished difference Result 1470 states and 4693 transitions. [2021-06-12 20:21:25,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:21:25,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:25,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:25,665 INFO L225 Difference]: With dead ends: 1470 [2021-06-12 20:21:25,665 INFO L226 Difference]: Without dead ends: 1407 [2021-06-12 20:21:25,665 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 275.4ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:21:25,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-06-12 20:21:25,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1130. [2021-06-12 20:21:25,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 3.2719220549158545) internal successors, (3694), 1129 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 3694 transitions. [2021-06-12 20:21:25,677 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 3694 transitions. Word has length 24 [2021-06-12 20:21:25,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:25,677 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 3694 transitions. [2021-06-12 20:21:25,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:25,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 3694 transitions. [2021-06-12 20:21:25,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:25,678 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:25,678 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:25,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7383,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:25,878 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:25,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:25,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1623714052, now seen corresponding path program 348 times [2021-06-12 20:21:25,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:25,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854904583] [2021-06-12 20:21:25,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:25,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:25,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854904583] [2021-06-12 20:21:25,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854904583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:25,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270559908] [2021-06-12 20:21:25,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:26,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:21:26,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:26,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:21:26,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:26,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270559908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:26,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:26,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:21:26,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653994039] [2021-06-12 20:21:26,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:21:26,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:26,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:21:26,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:21:26,239 INFO L87 Difference]: Start difference. First operand 1130 states and 3694 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:26,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:26,429 INFO L93 Difference]: Finished difference Result 1323 states and 4250 transitions. [2021-06-12 20:21:26,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:21:26,430 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:26,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:26,431 INFO L225 Difference]: With dead ends: 1323 [2021-06-12 20:21:26,431 INFO L226 Difference]: Without dead ends: 1248 [2021-06-12 20:21:26,432 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 246.8ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:21:26,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-12 20:21:26,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1088. [2021-06-12 20:21:26,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 3.2594296228150874) internal successors, (3543), 1087 states have internal predecessors, (3543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:26,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3543 transitions. [2021-06-12 20:21:26,446 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3543 transitions. Word has length 24 [2021-06-12 20:21:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:26,446 INFO L482 AbstractCegarLoop]: Abstraction has 1088 states and 3543 transitions. [2021-06-12 20:21:26,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3543 transitions. [2021-06-12 20:21:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:26,447 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:26,447 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:26,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7400 [2021-06-12 20:21:26,648 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:26,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:26,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1130511476, now seen corresponding path program 349 times [2021-06-12 20:21:26,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:26,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851647028] [2021-06-12 20:21:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:26,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:26,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851647028] [2021-06-12 20:21:26,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851647028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:26,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962235077] [2021-06-12 20:21:26,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:26,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:21:26,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:27,182 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_310, ends_with_6], 1=[ends_with_10]} [2021-06-12 20:21:27,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:21:27,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:27,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:27,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:27,281 INFO L628 ElimStorePlain]: treesize reduction 145, result has 39.3 percent of original size [2021-06-12 20:21:27,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:27,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:27,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:27,288 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:27,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:27,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:27,344 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-12 20:21:27,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:27,347 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:27,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:27,350 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:27,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:27,353 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:27,390 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-12 20:21:27,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:21:27,391 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:268, output treesize:24 [2021-06-12 20:21:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:27,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962235077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:27,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:27,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:21:27,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773922392] [2021-06-12 20:21:27,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:21:27,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:27,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:21:27,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:21:27,444 INFO L87 Difference]: Start difference. First operand 1088 states and 3543 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:27,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:27,658 INFO L93 Difference]: Finished difference Result 1584 states and 5045 transitions. [2021-06-12 20:21:27,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:21:27,659 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:27,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:27,660 INFO L225 Difference]: With dead ends: 1584 [2021-06-12 20:21:27,660 INFO L226 Difference]: Without dead ends: 1515 [2021-06-12 20:21:27,660 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:21:27,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-12 20:21:27,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1136. [2021-06-12 20:21:27,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.289867841409692) internal successors, (3734), 1135 states have internal predecessors, (3734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3734 transitions. [2021-06-12 20:21:27,672 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3734 transitions. Word has length 24 [2021-06-12 20:21:27,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:27,672 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3734 transitions. [2021-06-12 20:21:27,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:27,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3734 transitions. [2021-06-12 20:21:27,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:27,674 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:27,674 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:27,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7412 [2021-06-12 20:21:27,874 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:27,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:27,874 INFO L82 PathProgramCache]: Analyzing trace with hash 54570504, now seen corresponding path program 350 times [2021-06-12 20:21:27,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:27,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179918917] [2021-06-12 20:21:27,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:27,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:27,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179918917] [2021-06-12 20:21:27,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179918917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:27,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462539578] [2021-06-12 20:21:27,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:28,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:21:28,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:28,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:21:28,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:28,428 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_311, ends_with_6], 1=[ends_with_10]} [2021-06-12 20:21:28,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:21:28,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:28,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:28,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:28,526 INFO L628 ElimStorePlain]: treesize reduction 145, result has 39.3 percent of original size [2021-06-12 20:21:28,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:28,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:28,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:28,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:28,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:28,535 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:28,586 INFO L628 ElimStorePlain]: treesize reduction 21, result has 74.7 percent of original size [2021-06-12 20:21:28,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:28,589 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:28,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:28,592 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:28,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:28,595 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:28,633 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-12 20:21:28,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:21:28,643 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:268, output treesize:24 [2021-06-12 20:21:28,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:28,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462539578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:28,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:28,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:21:28,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103058869] [2021-06-12 20:21:28,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:21:28,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:28,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:21:28,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:21:28,713 INFO L87 Difference]: Start difference. First operand 1136 states and 3734 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:28,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:28,977 INFO L93 Difference]: Finished difference Result 1687 states and 5370 transitions. [2021-06-12 20:21:28,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:21:28,977 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:28,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:28,979 INFO L225 Difference]: With dead ends: 1687 [2021-06-12 20:21:28,979 INFO L226 Difference]: Without dead ends: 1635 [2021-06-12 20:21:28,979 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 323.9ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:21:28,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-12 20:21:28,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1134. [2021-06-12 20:21:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1133 states have (on average 3.2983230361871136) internal successors, (3737), 1133 states have internal predecessors, (3737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:28,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 3737 transitions. [2021-06-12 20:21:28,992 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 3737 transitions. Word has length 24 [2021-06-12 20:21:28,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:28,992 INFO L482 AbstractCegarLoop]: Abstraction has 1134 states and 3737 transitions. [2021-06-12 20:21:28,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:28,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 3737 transitions. [2021-06-12 20:21:28,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:28,993 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:28,993 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:29,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7506,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:29,194 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:29,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:29,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1814623444, now seen corresponding path program 351 times [2021-06-12 20:21:29,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:29,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657785470] [2021-06-12 20:21:29,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:29,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:29,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657785470] [2021-06-12 20:21:29,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657785470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:29,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418584752] [2021-06-12 20:21:29,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:29,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:21:29,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:29,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:21:29,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:29,607 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_313, v_prenex_312, ends_with_6], 1=[ends_with_10]} [2021-06-12 20:21:29,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:29,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:29,656 INFO L628 ElimStorePlain]: treesize reduction 94, result has 32.4 percent of original size [2021-06-12 20:21:29,656 INFO L518 ElimStorePlain]: Eliminatee v_prenex_312 vanished before elimination [2021-06-12 20:21:29,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:29,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:29,691 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.6 percent of original size [2021-06-12 20:21:29,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:29,694 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:29,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:29,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:29,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:29,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:21:29,710 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:142, output treesize:16 [2021-06-12 20:21:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:29,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418584752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:29,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:29,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:21:29,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336940110] [2021-06-12 20:21:29,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:21:29,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:29,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:21:29,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:21:29,753 INFO L87 Difference]: Start difference. First operand 1134 states and 3737 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:29,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:29,999 INFO L93 Difference]: Finished difference Result 1432 states and 4583 transitions. [2021-06-12 20:21:29,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:21:29,999 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:29,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:30,001 INFO L225 Difference]: With dead ends: 1432 [2021-06-12 20:21:30,001 INFO L226 Difference]: Without dead ends: 1380 [2021-06-12 20:21:30,001 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 291.4ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:21:30,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-06-12 20:21:30,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1094. [2021-06-12 20:21:30,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.262580054894785) internal successors, (3566), 1093 states have internal predecessors, (3566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:30,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3566 transitions. [2021-06-12 20:21:30,023 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3566 transitions. Word has length 24 [2021-06-12 20:21:30,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:30,023 INFO L482 AbstractCegarLoop]: Abstraction has 1094 states and 3566 transitions. [2021-06-12 20:21:30,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:30,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3566 transitions. [2021-06-12 20:21:30,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:30,024 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:30,024 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:30,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7601,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:30,225 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:30,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:30,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1658558706, now seen corresponding path program 352 times [2021-06-12 20:21:30,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:30,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157611358] [2021-06-12 20:21:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:21:30,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:30,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157611358] [2021-06-12 20:21:30,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157611358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:30,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166850968] [2021-06-12 20:21:30,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:30,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:21:30,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:30,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:21:30,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:30,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:30,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:30,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:30,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:30,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:30,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:30,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:30,545 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:30,604 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-06-12 20:21:30,605 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-06-12 20:21:30,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:21:30,607 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:137, output treesize:59 [2021-06-12 20:21:30,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:21:30,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:21:30,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:21:30,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:30,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:30,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:30,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:30,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:21:30,711 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:11 [2021-06-12 20:21:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:30,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166850968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:30,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:30,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:21:30,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563361684] [2021-06-12 20:21:30,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:21:30,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:30,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:21:30,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:21:30,751 INFO L87 Difference]: Start difference. First operand 1094 states and 3566 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:32,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:32,166 INFO L93 Difference]: Finished difference Result 1761 states and 5439 transitions. [2021-06-12 20:21:32,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:21:32,167 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:32,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:32,169 INFO L225 Difference]: With dead ends: 1761 [2021-06-12 20:21:32,169 INFO L226 Difference]: Without dead ends: 1531 [2021-06-12 20:21:32,169 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1095.6ms TimeCoverageRelationStatistics Valid=225, Invalid=1497, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:21:32,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2021-06-12 20:21:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1136. [2021-06-12 20:21:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2731277533039647) internal successors, (3715), 1135 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:32,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3715 transitions. [2021-06-12 20:21:32,181 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3715 transitions. Word has length 24 [2021-06-12 20:21:32,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:32,181 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3715 transitions. [2021-06-12 20:21:32,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:32,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3715 transitions. [2021-06-12 20:21:32,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:32,182 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:32,182 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:32,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7627,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:32,383 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:32,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:32,383 INFO L82 PathProgramCache]: Analyzing trace with hash -98423810, now seen corresponding path program 353 times [2021-06-12 20:21:32,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:32,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990479128] [2021-06-12 20:21:32,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:32,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:32,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990479128] [2021-06-12 20:21:32,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990479128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:32,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142696607] [2021-06-12 20:21:32,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:32,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:21:32,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:32,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:21:32,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:32,915 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_316], 1=[ends_with_10]} [2021-06-12 20:21:32,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:32,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:32,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:32,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:32,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:32,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:32,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:21:32,929 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:32,981 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.3 percent of original size [2021-06-12 20:21:32,981 INFO L518 ElimStorePlain]: Eliminatee v_prenex_316 vanished before elimination [2021-06-12 20:21:32,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:32,984 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:32,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:32,987 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:33,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:33,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:21:33,008 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:172, output treesize:16 [2021-06-12 20:21:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:33,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142696607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:33,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:33,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-12 20:21:33,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59890122] [2021-06-12 20:21:33,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:21:33,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:33,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:21:33,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:21:33,050 INFO L87 Difference]: Start difference. First operand 1136 states and 3715 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:33,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:33,518 INFO L93 Difference]: Finished difference Result 1472 states and 4723 transitions. [2021-06-12 20:21:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:21:33,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:33,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:33,520 INFO L225 Difference]: With dead ends: 1472 [2021-06-12 20:21:33,520 INFO L226 Difference]: Without dead ends: 1420 [2021-06-12 20:21:33,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 475.5ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:21:33,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1420 states. [2021-06-12 20:21:33,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1420 to 1136. [2021-06-12 20:21:33,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 3.2731277533039647) internal successors, (3715), 1135 states have internal predecessors, (3715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3715 transitions. [2021-06-12 20:21:33,532 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3715 transitions. Word has length 24 [2021-06-12 20:21:33,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:33,532 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3715 transitions. [2021-06-12 20:21:33,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:33,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3715 transitions. [2021-06-12 20:21:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:33,533 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:33,533 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:33,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7646,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:33,734 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:33,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:33,734 INFO L82 PathProgramCache]: Analyzing trace with hash -320984176, now seen corresponding path program 354 times [2021-06-12 20:21:33,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:33,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806407815] [2021-06-12 20:21:33,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:33,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:33,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806407815] [2021-06-12 20:21:33,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806407815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:33,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804210066] [2021-06-12 20:21:33,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:34,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:21:34,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:34,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:21:34,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:34,348 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_317, v_prenex_318], 1=[ends_with_10]} [2021-06-12 20:21:34,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:34,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:34,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:34,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:34,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:34,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:34,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:21:34,364 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:34,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:34,368 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:34,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:34,372 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:34,495 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-06-12 20:21:34,495 INFO L628 ElimStorePlain]: treesize reduction 180, result has 39.6 percent of original size [2021-06-12 20:21:34,495 INFO L518 ElimStorePlain]: Eliminatee v_prenex_317 vanished before elimination [2021-06-12 20:21:34,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:34,499 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:34,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:34,502 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:34,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:34,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:34,556 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:34,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:34,559 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:34,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:34,562 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:34,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:34,565 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:34,633 INFO L628 ElimStorePlain]: treesize reduction 20, result has 79.4 percent of original size [2021-06-12 20:21:34,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:21:34,635 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 6 variables, input treesize:353, output treesize:31 [2021-06-12 20:21:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:34,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804210066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:34,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:34,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-12 20:21:34,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106890509] [2021-06-12 20:21:34,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:21:34,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:34,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:21:34,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:21:34,713 INFO L87 Difference]: Start difference. First operand 1136 states and 3715 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:35,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:35,301 INFO L93 Difference]: Finished difference Result 1574 states and 5014 transitions. [2021-06-12 20:21:35,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:21:35,301 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:35,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:35,303 INFO L225 Difference]: With dead ends: 1574 [2021-06-12 20:21:35,303 INFO L226 Difference]: Without dead ends: 1505 [2021-06-12 20:21:35,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 597.9ms TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:21:35,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-12 20:21:35,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1163. [2021-06-12 20:21:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 3.2900172117039586) internal successors, (3823), 1162 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 3823 transitions. [2021-06-12 20:21:35,315 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 3823 transitions. Word has length 24 [2021-06-12 20:21:35,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:35,315 INFO L482 AbstractCegarLoop]: Abstraction has 1163 states and 3823 transitions. [2021-06-12 20:21:35,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:35,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 3823 transitions. [2021-06-12 20:21:35,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:35,316 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:35,316 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:35,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7695 [2021-06-12 20:21:35,516 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:35,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:35,517 INFO L82 PathProgramCache]: Analyzing trace with hash 825622932, now seen corresponding path program 355 times [2021-06-12 20:21:35,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:35,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063483636] [2021-06-12 20:21:35,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:35,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:35,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063483636] [2021-06-12 20:21:35,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063483636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:35,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061803315] [2021-06-12 20:21:35,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:35,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:21:35,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:36,141 INFO L446 ElimStorePlain]: Different costs {0=[ends_with_6, v_prenex_319], 1=[ends_with_10]} [2021-06-12 20:21:36,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:21:36,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:36,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:36,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:36,288 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-06-12 20:21:36,289 INFO L628 ElimStorePlain]: treesize reduction 112, result has 57.4 percent of original size [2021-06-12 20:21:36,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:36,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:36,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:36,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:36,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:36,300 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:36,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:36,303 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:36,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:36,306 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:36,404 INFO L628 ElimStorePlain]: treesize reduction 21, result has 84.2 percent of original size [2021-06-12 20:21:36,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:36,408 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:36,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:36,411 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:36,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:36,415 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:36,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:36,418 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:36,485 INFO L628 ElimStorePlain]: treesize reduction 20, result has 79.4 percent of original size [2021-06-12 20:21:36,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 3 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:21:36,487 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 5 variables, input treesize:298, output treesize:31 [2021-06-12 20:21:36,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:36,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061803315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:36,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:36,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-12 20:21:36,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635581891] [2021-06-12 20:21:36,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:21:36,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:36,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:21:36,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:21:36,568 INFO L87 Difference]: Start difference. First operand 1163 states and 3823 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:37,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:37,119 INFO L93 Difference]: Finished difference Result 1612 states and 5118 transitions. [2021-06-12 20:21:37,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:21:37,119 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:37,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:37,121 INFO L225 Difference]: With dead ends: 1612 [2021-06-12 20:21:37,121 INFO L226 Difference]: Without dead ends: 1560 [2021-06-12 20:21:37,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 609.0ms TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:21:37,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-06-12 20:21:37,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1137. [2021-06-12 20:21:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.273767605633803) internal successors, (3719), 1136 states have internal predecessors, (3719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3719 transitions. [2021-06-12 20:21:37,134 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3719 transitions. Word has length 24 [2021-06-12 20:21:37,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:37,134 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 3719 transitions. [2021-06-12 20:21:37,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:37,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3719 transitions. [2021-06-12 20:21:37,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:37,136 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:37,136 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:37,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7759 [2021-06-12 20:21:37,336 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:37,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:37,336 INFO L82 PathProgramCache]: Analyzing trace with hash 252674682, now seen corresponding path program 356 times [2021-06-12 20:21:37,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:37,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103975624] [2021-06-12 20:21:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:37,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:37,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103975624] [2021-06-12 20:21:37,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103975624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:37,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23370867] [2021-06-12 20:21:37,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:37,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:21:37,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:37,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:21:37,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:37,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:37,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:37,711 INFO L628 ElimStorePlain]: treesize reduction 29, result has 71.8 percent of original size [2021-06-12 20:21:37,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:37,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:37,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:37,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:37,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:37,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:37,777 INFO L518 ElimStorePlain]: Eliminatee ends_with_6 vanished before elimination [2021-06-12 20:21:37,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:21:37,779 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:107, output treesize:59 [2021-06-12 20:21:37,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:37,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:37,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:21:37,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:21:37,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:37,889 INFO L628 ElimStorePlain]: treesize reduction 23, result has 67.6 percent of original size [2021-06-12 20:21:37,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:37,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:37,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:37,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:21:37,911 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:26 [2021-06-12 20:21:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:21:37,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23370867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:37,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:37,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:21:37,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409054399] [2021-06-12 20:21:37,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:21:37,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:37,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:21:37,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:21:37,991 INFO L87 Difference]: Start difference. First operand 1137 states and 3719 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:39,286 INFO L93 Difference]: Finished difference Result 1825 states and 5709 transitions. [2021-06-12 20:21:39,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:21:39,286 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:39,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:39,288 INFO L225 Difference]: With dead ends: 1825 [2021-06-12 20:21:39,289 INFO L226 Difference]: Without dead ends: 1684 [2021-06-12 20:21:39,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1023.7ms TimeCoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:21:39,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-06-12 20:21:39,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1146. [2021-06-12 20:21:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.2995633187772926) internal successors, (3778), 1145 states have internal predecessors, (3778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:39,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3778 transitions. [2021-06-12 20:21:39,303 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3778 transitions. Word has length 24 [2021-06-12 20:21:39,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:39,303 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 3778 transitions. [2021-06-12 20:21:39,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:39,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3778 transitions. [2021-06-12 20:21:39,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 20:21:39,304 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:39,304 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:39,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7829 [2021-06-12 20:21:39,505 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:39,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:39,505 INFO L82 PathProgramCache]: Analyzing trace with hash -591717378, now seen corresponding path program 357 times [2021-06-12 20:21:39,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:39,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602408837] [2021-06-12 20:21:39,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:21:39,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:39,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602408837] [2021-06-12 20:21:39,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602408837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:39,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861145072] [2021-06-12 20:21:39,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:39,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:21:39,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:39,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:21:39,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:39,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:39,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:39,923 INFO L628 ElimStorePlain]: treesize reduction 58, result has 64.2 percent of original size [2021-06-12 20:21:39,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:39,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:40,006 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-12 20:21:40,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:40,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:40,069 INFO L628 ElimStorePlain]: treesize reduction 22, result has 76.3 percent of original size [2021-06-12 20:21:40,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:40,073 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:40,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:40,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:21:40,103 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:165, output treesize:59 [2021-06-12 20:21:40,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:21:40,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:40,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:21:40,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:21:40,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:40,223 INFO L628 ElimStorePlain]: treesize reduction 40, result has 54.0 percent of original size [2021-06-12 20:21:40,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:21:40,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:21:40,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:21:40,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:21:40,245 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:99, output treesize:26 [2021-06-12 20:21:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:40,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861145072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:40,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:40,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:21:40,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104229274] [2021-06-12 20:21:40,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:21:40,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:40,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:21:40,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:21:40,324 INFO L87 Difference]: Start difference. First operand 1146 states and 3778 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:41,734 INFO L93 Difference]: Finished difference Result 1665 states and 5212 transitions. [2021-06-12 20:21:41,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:21:41,735 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 20:21:41,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:41,737 INFO L225 Difference]: With dead ends: 1665 [2021-06-12 20:21:41,737 INFO L226 Difference]: Without dead ends: 1518 [2021-06-12 20:21:41,737 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1128.9ms TimeCoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:21:41,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-06-12 20:21:41,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1069. [2021-06-12 20:21:41,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.25) internal successors, (3471), 1068 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:41,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3471 transitions. [2021-06-12 20:21:41,750 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3471 transitions. Word has length 24 [2021-06-12 20:21:41,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:41,750 INFO L482 AbstractCegarLoop]: Abstraction has 1069 states and 3471 transitions. [2021-06-12 20:21:41,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:41,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3471 transitions. [2021-06-12 20:21:41,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:21:41,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:41,752 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:41,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7847 [2021-06-12 20:21:41,952 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:41,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:41,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1468889190, now seen corresponding path program 358 times [2021-06-12 20:21:41,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:41,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975295854] [2021-06-12 20:21:41,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:42,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:42,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975295854] [2021-06-12 20:21:42,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975295854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:42,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224666921] [2021-06-12 20:21:42,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:42,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:21:42,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:42,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:21:42,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:42,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224666921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:42,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:42,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:21:42,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575856172] [2021-06-12 20:21:42,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:21:42,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:42,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:21:42,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:21:42,427 INFO L87 Difference]: Start difference. First operand 1069 states and 3471 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:45,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:45,395 INFO L93 Difference]: Finished difference Result 2034 states and 6206 transitions. [2021-06-12 20:21:45,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-12 20:21:45,395 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:21:45,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:45,398 INFO L225 Difference]: With dead ends: 2034 [2021-06-12 20:21:45,398 INFO L226 Difference]: Without dead ends: 1956 [2021-06-12 20:21:45,398 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3037 ImplicationChecksByTransitivity, 1854.3ms TimeCoverageRelationStatistics Valid=782, Invalid=8148, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 20:21:45,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-06-12 20:21:45,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1101. [2021-06-12 20:21:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.2636363636363637) internal successors, (3590), 1100 states have internal predecessors, (3590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:45,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3590 transitions. [2021-06-12 20:21:45,414 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3590 transitions. Word has length 25 [2021-06-12 20:21:45,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:45,414 INFO L482 AbstractCegarLoop]: Abstraction has 1101 states and 3590 transitions. [2021-06-12 20:21:45,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:45,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3590 transitions. [2021-06-12 20:21:45,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:21:45,415 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:45,415 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:45,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7875,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:45,615 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:45,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:45,616 INFO L82 PathProgramCache]: Analyzing trace with hash 195955482, now seen corresponding path program 359 times [2021-06-12 20:21:45,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:45,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635608362] [2021-06-12 20:21:45,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:45,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:45,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635608362] [2021-06-12 20:21:45,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635608362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:45,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116430095] [2021-06-12 20:21:45,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:45,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:21:45,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:45,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:21:45,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:46,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116430095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:46,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:46,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:21:46,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974507835] [2021-06-12 20:21:46,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:21:46,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:46,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:21:46,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:21:46,290 INFO L87 Difference]: Start difference. First operand 1101 states and 3590 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:48,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:48,766 INFO L93 Difference]: Finished difference Result 1986 states and 6129 transitions. [2021-06-12 20:21:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 20:21:48,766 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:21:48,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:48,769 INFO L225 Difference]: With dead ends: 1986 [2021-06-12 20:21:48,769 INFO L226 Difference]: Without dead ends: 1908 [2021-06-12 20:21:48,769 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 1200.3ms TimeCoverageRelationStatistics Valid=457, Invalid=4945, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 20:21:48,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1908 states. [2021-06-12 20:21:48,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1908 to 1096. [2021-06-12 20:21:48,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 3.2831050228310503) internal successors, (3595), 1095 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3595 transitions. [2021-06-12 20:21:48,783 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3595 transitions. Word has length 25 [2021-06-12 20:21:48,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:48,784 INFO L482 AbstractCegarLoop]: Abstraction has 1096 states and 3595 transitions. [2021-06-12 20:21:48,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3595 transitions. [2021-06-12 20:21:48,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:21:48,785 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:48,785 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:48,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7884 [2021-06-12 20:21:48,985 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:48,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:48,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1381037462, now seen corresponding path program 360 times [2021-06-12 20:21:48,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:48,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123557105] [2021-06-12 20:21:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:49,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:49,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123557105] [2021-06-12 20:21:49,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123557105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:49,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973904229] [2021-06-12 20:21:49,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:49,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:21:49,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:49,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:21:49,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:49,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973904229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:49,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:49,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:21:49,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817926586] [2021-06-12 20:21:49,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:21:49,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:49,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:21:49,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:21:49,546 INFO L87 Difference]: Start difference. First operand 1096 states and 3595 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:51,601 INFO L93 Difference]: Finished difference Result 2064 states and 6370 transitions. [2021-06-12 20:21:51,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 20:21:51,601 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:21:51,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:51,604 INFO L225 Difference]: With dead ends: 2064 [2021-06-12 20:21:51,604 INFO L226 Difference]: Without dead ends: 2012 [2021-06-12 20:21:51,604 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 1211.6ms TimeCoverageRelationStatistics Valid=593, Invalid=5259, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 20:21:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-06-12 20:21:51,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1064. [2021-06-12 20:21:51,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.3029162746942617) internal successors, (3511), 1063 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:51,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3511 transitions. [2021-06-12 20:21:51,620 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3511 transitions. Word has length 25 [2021-06-12 20:21:51,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:51,620 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3511 transitions. [2021-06-12 20:21:51,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:51,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3511 transitions. [2021-06-12 20:21:51,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:21:51,621 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:51,621 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:51,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7982 [2021-06-12 20:21:51,821 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:51,822 INFO L82 PathProgramCache]: Analyzing trace with hash 496440448, now seen corresponding path program 361 times [2021-06-12 20:21:51,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:51,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850239273] [2021-06-12 20:21:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:51,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:51,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850239273] [2021-06-12 20:21:51,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850239273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:51,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305223841] [2021-06-12 20:21:51,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:52,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:21:52,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:52,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305223841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:52,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:52,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:21:52,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360697799] [2021-06-12 20:21:52,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:21:52,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:52,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:21:52,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:21:52,289 INFO L87 Difference]: Start difference. First operand 1064 states and 3511 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:53,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:53,756 INFO L93 Difference]: Finished difference Result 1617 states and 5059 transitions. [2021-06-12 20:21:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 20:21:53,756 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:21:53,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:53,758 INFO L225 Difference]: With dead ends: 1617 [2021-06-12 20:21:53,758 INFO L226 Difference]: Without dead ends: 1468 [2021-06-12 20:21:53,759 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 877.0ms TimeCoverageRelationStatistics Valid=331, Invalid=3451, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 20:21:53,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-06-12 20:21:53,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1074. [2021-06-12 20:21:53,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.302889095992544) internal successors, (3544), 1073 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:53,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3544 transitions. [2021-06-12 20:21:53,770 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3544 transitions. Word has length 25 [2021-06-12 20:21:53,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:53,771 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 3544 transitions. [2021-06-12 20:21:53,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:53,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3544 transitions. [2021-06-12 20:21:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:21:53,772 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:53,772 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:53,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8017 [2021-06-12 20:21:53,972 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:53,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:53,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1193889788, now seen corresponding path program 362 times [2021-06-12 20:21:53,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:53,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512009396] [2021-06-12 20:21:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:54,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:54,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512009396] [2021-06-12 20:21:54,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512009396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:54,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678023701] [2021-06-12 20:21:54,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:54,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:21:54,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:54,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:21:54,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:54,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678023701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:54,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:54,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:21:54,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190446988] [2021-06-12 20:21:54,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:21:54,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:54,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:21:54,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:21:54,445 INFO L87 Difference]: Start difference. First operand 1074 states and 3544 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:56,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:56,056 INFO L93 Difference]: Finished difference Result 1700 states and 5327 transitions. [2021-06-12 20:21:56,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 20:21:56,056 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:21:56,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:56,058 INFO L225 Difference]: With dead ends: 1700 [2021-06-12 20:21:56,058 INFO L226 Difference]: Without dead ends: 1579 [2021-06-12 20:21:56,059 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 1132.3ms TimeCoverageRelationStatistics Valid=409, Invalid=4283, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 20:21:56,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-06-12 20:21:56,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1087. [2021-06-12 20:21:56,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.303867403314917) internal successors, (3588), 1086 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:56,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3588 transitions. [2021-06-12 20:21:56,071 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3588 transitions. Word has length 25 [2021-06-12 20:21:56,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:56,071 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 3588 transitions. [2021-06-12 20:21:56,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:56,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3588 transitions. [2021-06-12 20:21:56,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:21:56,073 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:56,073 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:56,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8029 [2021-06-12 20:21:56,296 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:56,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:56,297 INFO L82 PathProgramCache]: Analyzing trace with hash -723274496, now seen corresponding path program 363 times [2021-06-12 20:21:56,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:56,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572347572] [2021-06-12 20:21:56,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:56,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:56,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572347572] [2021-06-12 20:21:56,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572347572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:56,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139398415] [2021-06-12 20:21:56,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:56,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:21:56,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:56,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:21:56,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:56,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139398415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:56,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:56,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:21:56,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036615519] [2021-06-12 20:21:56,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:21:56,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:56,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:21:56,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:21:56,759 INFO L87 Difference]: Start difference. First operand 1087 states and 3588 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:58,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:21:58,943 INFO L93 Difference]: Finished difference Result 1756 states and 5467 transitions. [2021-06-12 20:21:58,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 20:21:58,943 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:21:58,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:21:58,946 INFO L225 Difference]: With dead ends: 1756 [2021-06-12 20:21:58,946 INFO L226 Difference]: Without dead ends: 1678 [2021-06-12 20:21:58,947 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 1592.6ms TimeCoverageRelationStatistics Valid=641, Invalid=5365, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 20:21:58,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2021-06-12 20:21:58,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1088. [2021-06-12 20:21:58,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 3.3045078196872124) internal successors, (3592), 1087 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3592 transitions. [2021-06-12 20:21:58,960 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3592 transitions. Word has length 25 [2021-06-12 20:21:58,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:21:58,960 INFO L482 AbstractCegarLoop]: Abstraction has 1088 states and 3592 transitions. [2021-06-12 20:21:58,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:21:58,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3592 transitions. [2021-06-12 20:21:58,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:21:58,961 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:21:58,961 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:21:59,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8047 [2021-06-12 20:21:59,161 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:21:59,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:21:59,162 INFO L82 PathProgramCache]: Analyzing trace with hash 461807484, now seen corresponding path program 364 times [2021-06-12 20:21:59,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:21:59,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274222029] [2021-06-12 20:21:59,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:21:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:21:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:59,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:21:59,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274222029] [2021-06-12 20:21:59,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274222029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:59,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641421570] [2021-06-12 20:21:59,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:21:59,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:21:59,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:21:59,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:21:59,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:21:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:21:59,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641421570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:21:59,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:21:59,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:21:59,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942375003] [2021-06-12 20:21:59,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:21:59,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:21:59,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:21:59,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:21:59,659 INFO L87 Difference]: Start difference. First operand 1088 states and 3592 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:01,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:01,103 INFO L93 Difference]: Finished difference Result 1606 states and 5071 transitions. [2021-06-12 20:22:01,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 20:22:01,103 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:01,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:01,113 INFO L225 Difference]: With dead ends: 1606 [2021-06-12 20:22:01,114 INFO L226 Difference]: Without dead ends: 1554 [2021-06-12 20:22:01,114 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 980.2ms TimeCoverageRelationStatistics Valid=500, Invalid=3406, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 20:22:01,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-06-12 20:22:01,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1064. [2021-06-12 20:22:01,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.303857008466604) internal successors, (3512), 1063 states have internal predecessors, (3512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:01,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3512 transitions. [2021-06-12 20:22:01,126 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3512 transitions. Word has length 25 [2021-06-12 20:22:01,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:01,126 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3512 transitions. [2021-06-12 20:22:01,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:01,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3512 transitions. [2021-06-12 20:22:01,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:01,127 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:01,127 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:01,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8060,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:01,328 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:01,328 INFO L82 PathProgramCache]: Analyzing trace with hash 387650504, now seen corresponding path program 365 times [2021-06-12 20:22:01,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:01,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204471409] [2021-06-12 20:22:01,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:01,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:01,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204471409] [2021-06-12 20:22:01,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204471409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:01,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126145493] [2021-06-12 20:22:01,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:01,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:22:01,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:01,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:01,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:01,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126145493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:01,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:01,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:01,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400674251] [2021-06-12 20:22:01,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:01,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:01,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:01,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:01,770 INFO L87 Difference]: Start difference. First operand 1064 states and 3512 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:03,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:03,256 INFO L93 Difference]: Finished difference Result 1593 states and 4983 transitions. [2021-06-12 20:22:03,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 20:22:03,257 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:03,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:03,258 INFO L225 Difference]: With dead ends: 1593 [2021-06-12 20:22:03,258 INFO L226 Difference]: Without dead ends: 1472 [2021-06-12 20:22:03,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 883.9ms TimeCoverageRelationStatistics Valid=354, Invalid=3552, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 20:22:03,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-06-12 20:22:03,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1064. [2021-06-12 20:22:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 3.2925682031984946) internal successors, (3500), 1063 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 3500 transitions. [2021-06-12 20:22:03,270 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 3500 transitions. Word has length 25 [2021-06-12 20:22:03,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:03,270 INFO L482 AbstractCegarLoop]: Abstraction has 1064 states and 3500 transitions. [2021-06-12 20:22:03,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:03,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 3500 transitions. [2021-06-12 20:22:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:03,271 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:03,271 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:03,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8079,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:03,473 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:03,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:03,474 INFO L82 PathProgramCache]: Analyzing trace with hash -344431800, now seen corresponding path program 366 times [2021-06-12 20:22:03,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:03,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744521079] [2021-06-12 20:22:03,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:03,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:03,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744521079] [2021-06-12 20:22:03,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744521079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:03,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796676326] [2021-06-12 20:22:03,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:03,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:22:03,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:03,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:22:03,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:03,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796676326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:03,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:03,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:03,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891113811] [2021-06-12 20:22:03,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:03,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:03,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:03,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:03,985 INFO L87 Difference]: Start difference. First operand 1064 states and 3500 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:05,400 INFO L93 Difference]: Finished difference Result 1555 states and 4863 transitions. [2021-06-12 20:22:05,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 20:22:05,401 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:05,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:05,402 INFO L225 Difference]: With dead ends: 1555 [2021-06-12 20:22:05,403 INFO L226 Difference]: Without dead ends: 1503 [2021-06-12 20:22:05,403 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 1053.3ms TimeCoverageRelationStatistics Valid=496, Invalid=3536, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 20:22:05,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2021-06-12 20:22:05,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1025. [2021-06-12 20:22:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 3.265625) internal successors, (3344), 1024 states have internal predecessors, (3344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3344 transitions. [2021-06-12 20:22:05,415 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3344 transitions. Word has length 25 [2021-06-12 20:22:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:05,416 INFO L482 AbstractCegarLoop]: Abstraction has 1025 states and 3344 transitions. [2021-06-12 20:22:05,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:05,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3344 transitions. [2021-06-12 20:22:05,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:05,417 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:05,417 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:05,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8092,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:05,619 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:05,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:05,619 INFO L82 PathProgramCache]: Analyzing trace with hash 142687432, now seen corresponding path program 367 times [2021-06-12 20:22:05,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:05,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977479481] [2021-06-12 20:22:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:05,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:05,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977479481] [2021-06-12 20:22:05,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977479481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:05,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630335708] [2021-06-12 20:22:05,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:05,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:05,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:06,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630335708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:06,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:06,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:06,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457119021] [2021-06-12 20:22:06,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:06,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:06,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:06,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:06,082 INFO L87 Difference]: Start difference. First operand 1025 states and 3344 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:07,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:07,680 INFO L93 Difference]: Finished difference Result 1634 states and 5077 transitions. [2021-06-12 20:22:07,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 20:22:07,681 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:07,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:07,683 INFO L225 Difference]: With dead ends: 1634 [2021-06-12 20:22:07,683 INFO L226 Difference]: Without dead ends: 1582 [2021-06-12 20:22:07,683 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 962.9ms TimeCoverageRelationStatistics Valid=488, Invalid=4068, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 20:22:07,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-06-12 20:22:07,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 928. [2021-06-12 20:22:07,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.236245954692557) internal successors, (3000), 927 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:07,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3000 transitions. [2021-06-12 20:22:07,698 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3000 transitions. Word has length 25 [2021-06-12 20:22:07,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:07,699 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3000 transitions. [2021-06-12 20:22:07,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:07,699 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3000 transitions. [2021-06-12 20:22:07,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:07,700 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:07,700 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:07,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8109,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:07,900 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:07,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:07,900 INFO L82 PathProgramCache]: Analyzing trace with hash -720949964, now seen corresponding path program 368 times [2021-06-12 20:22:07,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:07,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214360553] [2021-06-12 20:22:07,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:07,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:07,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214360553] [2021-06-12 20:22:07,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214360553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:07,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120297683] [2021-06-12 20:22:07,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:08,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:22:08,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:08,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:08,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:08,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120297683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:08,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:08,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:08,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953797946] [2021-06-12 20:22:08,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:08,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:08,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:08,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:08,349 INFO L87 Difference]: Start difference. First operand 928 states and 3000 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:09,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:09,832 INFO L93 Difference]: Finished difference Result 1353 states and 4151 transitions. [2021-06-12 20:22:09,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:22:09,832 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:09,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:09,834 INFO L225 Difference]: With dead ends: 1353 [2021-06-12 20:22:09,834 INFO L226 Difference]: Without dead ends: 1204 [2021-06-12 20:22:09,834 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 764.5ms TimeCoverageRelationStatistics Valid=344, Invalid=2962, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 20:22:09,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-06-12 20:22:09,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 934. [2021-06-12 20:22:09,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.2293676312968915) internal successors, (3013), 933 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3013 transitions. [2021-06-12 20:22:09,844 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3013 transitions. Word has length 25 [2021-06-12 20:22:09,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:09,844 INFO L482 AbstractCegarLoop]: Abstraction has 934 states and 3013 transitions. [2021-06-12 20:22:09,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:09,845 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3013 transitions. [2021-06-12 20:22:09,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:09,845 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:09,846 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:10,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8115 [2021-06-12 20:22:10,046 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:10,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:10,047 INFO L82 PathProgramCache]: Analyzing trace with hash -23500624, now seen corresponding path program 369 times [2021-06-12 20:22:10,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:10,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517480146] [2021-06-12 20:22:10,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:10,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:10,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517480146] [2021-06-12 20:22:10,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517480146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:10,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364872404] [2021-06-12 20:22:10,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:10,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:22:10,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:10,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:10,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:10,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364872404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:10,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:10,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:10,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913223005] [2021-06-12 20:22:10,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:10,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:10,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:10,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:10,548 INFO L87 Difference]: Start difference. First operand 934 states and 3013 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:11,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:11,924 INFO L93 Difference]: Finished difference Result 1438 states and 4422 transitions. [2021-06-12 20:22:11,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:22:11,924 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:11,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:11,926 INFO L225 Difference]: With dead ends: 1438 [2021-06-12 20:22:11,926 INFO L226 Difference]: Without dead ends: 1317 [2021-06-12 20:22:11,926 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1078.9ms TimeCoverageRelationStatistics Valid=363, Invalid=3177, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:22:11,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-06-12 20:22:11,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 945. [2021-06-12 20:22:11,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 944 states have (on average 3.2288135593220337) internal successors, (3048), 944 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:11,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 3048 transitions. [2021-06-12 20:22:11,936 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 3048 transitions. Word has length 25 [2021-06-12 20:22:11,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:11,936 INFO L482 AbstractCegarLoop]: Abstraction has 945 states and 3048 transitions. [2021-06-12 20:22:11,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:11,937 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 3048 transitions. [2021-06-12 20:22:11,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:11,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:11,937 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:12,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8131 [2021-06-12 20:22:12,138 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:12,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:12,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1940664908, now seen corresponding path program 370 times [2021-06-12 20:22:12,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:12,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336421130] [2021-06-12 20:22:12,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:12,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:12,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336421130] [2021-06-12 20:22:12,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336421130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:12,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827628390] [2021-06-12 20:22:12,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:12,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:22:12,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:12,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:12,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:12,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827628390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:12,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:12,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:12,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295243812] [2021-06-12 20:22:12,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:12,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:12,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:12,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:12,601 INFO L87 Difference]: Start difference. First operand 945 states and 3048 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:14,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:14,571 INFO L93 Difference]: Finished difference Result 1649 states and 5064 transitions. [2021-06-12 20:22:14,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 20:22:14,571 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:14,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:14,573 INFO L225 Difference]: With dead ends: 1649 [2021-06-12 20:22:14,573 INFO L226 Difference]: Without dead ends: 1571 [2021-06-12 20:22:14,573 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 1568.2ms TimeCoverageRelationStatistics Valid=658, Invalid=5348, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 20:22:14,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2021-06-12 20:22:14,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 988. [2021-06-12 20:22:14,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 3.243161094224924) internal successors, (3201), 987 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 3201 transitions. [2021-06-12 20:22:14,584 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 3201 transitions. Word has length 25 [2021-06-12 20:22:14,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:14,584 INFO L482 AbstractCegarLoop]: Abstraction has 988 states and 3201 transitions. [2021-06-12 20:22:14,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 3201 transitions. [2021-06-12 20:22:14,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:14,585 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:14,585 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:14,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8139,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:14,786 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:14,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:14,786 INFO L82 PathProgramCache]: Analyzing trace with hash -755582928, now seen corresponding path program 371 times [2021-06-12 20:22:14,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:14,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415899012] [2021-06-12 20:22:14,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:14,888 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:14,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:14,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415899012] [2021-06-12 20:22:14,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415899012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:14,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152674372] [2021-06-12 20:22:14,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:15,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:22:15,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:15,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:15,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:15,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152674372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:15,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:15,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:15,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916959529] [2021-06-12 20:22:15,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:15,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:15,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:15,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:15,263 INFO L87 Difference]: Start difference. First operand 988 states and 3201 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:16,612 INFO L93 Difference]: Finished difference Result 1507 states and 4689 transitions. [2021-06-12 20:22:16,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 20:22:16,612 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:16,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:16,614 INFO L225 Difference]: With dead ends: 1507 [2021-06-12 20:22:16,614 INFO L226 Difference]: Without dead ends: 1455 [2021-06-12 20:22:16,615 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 1039.6ms TimeCoverageRelationStatistics Valid=559, Invalid=3997, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 20:22:16,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-06-12 20:22:16,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 920. [2021-06-12 20:22:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.2241566920565834) internal successors, (2963), 919 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2963 transitions. [2021-06-12 20:22:16,626 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2963 transitions. Word has length 25 [2021-06-12 20:22:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:16,626 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 2963 transitions. [2021-06-12 20:22:16,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2963 transitions. [2021-06-12 20:22:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:16,627 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:16,627 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:16,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8152 [2021-06-12 20:22:16,827 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:16,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:16,827 INFO L82 PathProgramCache]: Analyzing trace with hash -829739908, now seen corresponding path program 372 times [2021-06-12 20:22:16,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:16,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063007935] [2021-06-12 20:22:16,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:16,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:16,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063007935] [2021-06-12 20:22:16,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063007935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:16,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16953795] [2021-06-12 20:22:16,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:17,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:22:17,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:17,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:17,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:17,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:17,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16953795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:17,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:17,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:17,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743170964] [2021-06-12 20:22:17,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:17,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:17,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:17,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:17,274 INFO L87 Difference]: Start difference. First operand 920 states and 2963 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:18,646 INFO L93 Difference]: Finished difference Result 1457 states and 4481 transitions. [2021-06-12 20:22:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:22:18,646 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:18,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:18,648 INFO L225 Difference]: With dead ends: 1457 [2021-06-12 20:22:18,648 INFO L226 Difference]: Without dead ends: 1336 [2021-06-12 20:22:18,648 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 843.7ms TimeCoverageRelationStatistics Valid=349, Invalid=3073, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 20:22:18,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2021-06-12 20:22:18,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 947. [2021-06-12 20:22:18,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.2283298097251585) internal successors, (3054), 946 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:18,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3054 transitions. [2021-06-12 20:22:18,658 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3054 transitions. Word has length 25 [2021-06-12 20:22:18,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:18,659 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 3054 transitions. [2021-06-12 20:22:18,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:18,659 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3054 transitions. [2021-06-12 20:22:18,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:18,660 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:18,660 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:18,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8169 [2021-06-12 20:22:18,860 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:18,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:18,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1548063104, now seen corresponding path program 373 times [2021-06-12 20:22:18,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:18,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064633056] [2021-06-12 20:22:18,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:18,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:18,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064633056] [2021-06-12 20:22:18,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064633056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:18,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054918587] [2021-06-12 20:22:18,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:19,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:19,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:19,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054918587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:19,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:19,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:19,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837093335] [2021-06-12 20:22:19,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:19,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:19,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:19,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:19,300 INFO L87 Difference]: Start difference. First operand 947 states and 3054 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:21,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:21,351 INFO L93 Difference]: Finished difference Result 1637 states and 5024 transitions. [2021-06-12 20:22:21,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 20:22:21,352 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:21,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:21,354 INFO L225 Difference]: With dead ends: 1637 [2021-06-12 20:22:21,354 INFO L226 Difference]: Without dead ends: 1559 [2021-06-12 20:22:21,354 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 1569.0ms TimeCoverageRelationStatistics Valid=674, Invalid=5488, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 20:22:21,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-06-12 20:22:21,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 991. [2021-06-12 20:22:21,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 3.2444444444444445) internal successors, (3212), 990 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:21,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 3212 transitions. [2021-06-12 20:22:21,368 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 3212 transitions. Word has length 25 [2021-06-12 20:22:21,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:21,368 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 3212 transitions. [2021-06-12 20:22:21,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:21,368 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 3212 transitions. [2021-06-12 20:22:21,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:21,369 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:21,369 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:21,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8186,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:21,569 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:21,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:21,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1561822212, now seen corresponding path program 374 times [2021-06-12 20:22:21,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:21,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771319374] [2021-06-12 20:22:21,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:21,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:21,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771319374] [2021-06-12 20:22:21,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771319374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:21,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833409578] [2021-06-12 20:22:21,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:21,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:22:21,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:21,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:21,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:22,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833409578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:22,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:22,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:22,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700559614] [2021-06-12 20:22:22,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:22,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:22,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:22,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:22,078 INFO L87 Difference]: Start difference. First operand 991 states and 3212 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:23,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:23,440 INFO L93 Difference]: Finished difference Result 1495 states and 4649 transitions. [2021-06-12 20:22:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 20:22:23,441 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:23,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:23,442 INFO L225 Difference]: With dead ends: 1495 [2021-06-12 20:22:23,443 INFO L226 Difference]: Without dead ends: 1443 [2021-06-12 20:22:23,443 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1038.4ms TimeCoverageRelationStatistics Valid=565, Invalid=4127, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 20:22:23,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-06-12 20:22:23,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 935. [2021-06-12 20:22:23,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 934 states have (on average 3.226980728051392) internal successors, (3014), 934 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:23,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 3014 transitions. [2021-06-12 20:22:23,454 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 3014 transitions. Word has length 25 [2021-06-12 20:22:23,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:23,454 INFO L482 AbstractCegarLoop]: Abstraction has 935 states and 3014 transitions. [2021-06-12 20:22:23,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:23,454 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 3014 transitions. [2021-06-12 20:22:23,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:23,455 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:23,455 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:23,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8195 [2021-06-12 20:22:23,655 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:23,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:23,656 INFO L82 PathProgramCache]: Analyzing trace with hash 275129396, now seen corresponding path program 375 times [2021-06-12 20:22:23,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:23,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869013517] [2021-06-12 20:22:23,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:23,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:23,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869013517] [2021-06-12 20:22:23,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869013517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:23,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570605779] [2021-06-12 20:22:23,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:23,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:22:23,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:23,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:23,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:24,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570605779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:24,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:24,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:24,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307060405] [2021-06-12 20:22:24,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:24,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:24,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:24,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:24,181 INFO L87 Difference]: Start difference. First operand 935 states and 3014 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:25,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:25,683 INFO L93 Difference]: Finished difference Result 1836 states and 5621 transitions. [2021-06-12 20:22:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 20:22:25,683 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:25,686 INFO L225 Difference]: With dead ends: 1836 [2021-06-12 20:22:25,686 INFO L226 Difference]: Without dead ends: 1758 [2021-06-12 20:22:25,686 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 994.3ms TimeCoverageRelationStatistics Valid=441, Invalid=3849, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 20:22:25,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-06-12 20:22:25,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1005. [2021-06-12 20:22:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 3.25796812749004) internal successors, (3271), 1004 states have internal predecessors, (3271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 3271 transitions. [2021-06-12 20:22:25,699 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 3271 transitions. Word has length 25 [2021-06-12 20:22:25,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:25,699 INFO L482 AbstractCegarLoop]: Abstraction has 1005 states and 3271 transitions. [2021-06-12 20:22:25,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:25,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 3271 transitions. [2021-06-12 20:22:25,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:25,700 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:25,700 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:25,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8214 [2021-06-12 20:22:25,900 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:25,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1460211376, now seen corresponding path program 376 times [2021-06-12 20:22:25,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:25,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881729128] [2021-06-12 20:22:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:25,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:25,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:25,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881729128] [2021-06-12 20:22:25,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881729128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:25,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453898883] [2021-06-12 20:22:25,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:26,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:22:26,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:26,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:26,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:26,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453898883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:26,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:26,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:26,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943907086] [2021-06-12 20:22:26,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:26,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:26,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:26,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:26,463 INFO L87 Difference]: Start difference. First operand 1005 states and 3271 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:27,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:27,774 INFO L93 Difference]: Finished difference Result 1911 states and 5874 transitions. [2021-06-12 20:22:27,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 20:22:27,774 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:27,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:27,776 INFO L225 Difference]: With dead ends: 1911 [2021-06-12 20:22:27,776 INFO L226 Difference]: Without dead ends: 1859 [2021-06-12 20:22:27,777 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 884.0ms TimeCoverageRelationStatistics Valid=534, Invalid=4296, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 20:22:27,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2021-06-12 20:22:27,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 992. [2021-06-12 20:22:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.256306760847629) internal successors, (3227), 991 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:27,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3227 transitions. [2021-06-12 20:22:27,790 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3227 transitions. Word has length 25 [2021-06-12 20:22:27,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:27,790 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3227 transitions. [2021-06-12 20:22:27,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:27,790 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3227 transitions. [2021-06-12 20:22:27,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:27,791 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:27,791 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:27,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8242 [2021-06-12 20:22:27,991 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:27,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:27,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1074702980, now seen corresponding path program 377 times [2021-06-12 20:22:27,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:27,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832795605] [2021-06-12 20:22:27,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:28,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:28,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832795605] [2021-06-12 20:22:28,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832795605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:28,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166110680] [2021-06-12 20:22:28,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:28,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:22:28,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:28,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:28,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:28,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166110680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:28,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:28,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:28,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215350665] [2021-06-12 20:22:28,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:28,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:28,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:28,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:28,443 INFO L87 Difference]: Start difference. First operand 992 states and 3227 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:30,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:30,179 INFO L93 Difference]: Finished difference Result 1655 states and 5144 transitions. [2021-06-12 20:22:30,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 20:22:30,180 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:30,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:30,182 INFO L225 Difference]: With dead ends: 1655 [2021-06-12 20:22:30,182 INFO L226 Difference]: Without dead ends: 1603 [2021-06-12 20:22:30,182 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 927.8ms TimeCoverageRelationStatistics Valid=518, Invalid=4738, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 20:22:30,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2021-06-12 20:22:30,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 906. [2021-06-12 20:22:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.2220994475138123) internal successors, (2916), 905 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:30,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2916 transitions. [2021-06-12 20:22:30,193 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2916 transitions. Word has length 25 [2021-06-12 20:22:30,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:30,193 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 2916 transitions. [2021-06-12 20:22:30,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:30,193 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2916 transitions. [2021-06-12 20:22:30,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:30,194 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:30,194 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:30,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8287,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:30,395 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:30,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:30,395 INFO L82 PathProgramCache]: Analyzing trace with hash -53353936, now seen corresponding path program 378 times [2021-06-12 20:22:30,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:30,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856600330] [2021-06-12 20:22:30,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:30,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:30,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856600330] [2021-06-12 20:22:30,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856600330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:30,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629147551] [2021-06-12 20:22:30,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:30,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:22:30,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:30,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:30,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:30,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629147551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:30,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:30,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:30,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427923785] [2021-06-12 20:22:30,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:30,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:30,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:30,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:30,855 INFO L87 Difference]: Start difference. First operand 906 states and 2916 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:32,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:32,170 INFO L93 Difference]: Finished difference Result 1471 states and 4521 transitions. [2021-06-12 20:22:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 20:22:32,170 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:32,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:32,172 INFO L225 Difference]: With dead ends: 1471 [2021-06-12 20:22:32,172 INFO L226 Difference]: Without dead ends: 1350 [2021-06-12 20:22:32,172 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 854.5ms TimeCoverageRelationStatistics Valid=370, Invalid=3536, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 20:22:32,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-06-12 20:22:32,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 948. [2021-06-12 20:22:32,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 3.2270327349524814) internal successors, (3056), 947 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:32,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 3056 transitions. [2021-06-12 20:22:32,183 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 3056 transitions. Word has length 25 [2021-06-12 20:22:32,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:32,183 INFO L482 AbstractCegarLoop]: Abstraction has 948 states and 3056 transitions. [2021-06-12 20:22:32,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:32,183 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 3056 transitions. [2021-06-12 20:22:32,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:32,184 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:32,184 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:32,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8293,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:32,384 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:32,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:32,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1970518220, now seen corresponding path program 379 times [2021-06-12 20:22:32,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:32,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35122096] [2021-06-12 20:22:32,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:32,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:32,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35122096] [2021-06-12 20:22:32,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35122096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:32,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679667028] [2021-06-12 20:22:32,473 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:32,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:32,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:32,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679667028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:32,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:32,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:32,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908548134] [2021-06-12 20:22:32,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:32,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:32,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:32,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:32,842 INFO L87 Difference]: Start difference. First operand 948 states and 3056 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:34,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:34,942 INFO L93 Difference]: Finished difference Result 1694 states and 5196 transitions. [2021-06-12 20:22:34,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 20:22:34,942 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:34,944 INFO L225 Difference]: With dead ends: 1694 [2021-06-12 20:22:34,944 INFO L226 Difference]: Without dead ends: 1616 [2021-06-12 20:22:34,945 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2281 ImplicationChecksByTransitivity, 1614.9ms TimeCoverageRelationStatistics Valid=741, Invalid=6065, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 20:22:34,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2021-06-12 20:22:34,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 992. [2021-06-12 20:22:34,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.2431886982845612) internal successors, (3214), 991 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:34,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3214 transitions. [2021-06-12 20:22:34,957 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3214 transitions. Word has length 25 [2021-06-12 20:22:34,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:34,957 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3214 transitions. [2021-06-12 20:22:34,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:34,957 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3214 transitions. [2021-06-12 20:22:34,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:34,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:34,958 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:35,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8310 [2021-06-12 20:22:35,158 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:35,159 INFO L82 PathProgramCache]: Analyzing trace with hash -785436240, now seen corresponding path program 380 times [2021-06-12 20:22:35,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:35,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050056486] [2021-06-12 20:22:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:35,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:35,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050056486] [2021-06-12 20:22:35,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050056486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:35,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143327601] [2021-06-12 20:22:35,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:35,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:22:35,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:35,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:35,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:35,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143327601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:35,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:35,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:35,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513523267] [2021-06-12 20:22:35,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:35,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:35,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:35,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:35,618 INFO L87 Difference]: Start difference. First operand 992 states and 3214 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:36,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:36,987 INFO L93 Difference]: Finished difference Result 1552 states and 4821 transitions. [2021-06-12 20:22:36,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 20:22:36,987 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:36,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:36,989 INFO L225 Difference]: With dead ends: 1552 [2021-06-12 20:22:36,989 INFO L226 Difference]: Without dead ends: 1500 [2021-06-12 20:22:36,990 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1703 ImplicationChecksByTransitivity, 989.3ms TimeCoverageRelationStatistics Valid=640, Invalid=4616, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 20:22:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-06-12 20:22:37,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 936. [2021-06-12 20:22:37,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 3.225668449197861) internal successors, (3016), 935 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:37,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 3016 transitions. [2021-06-12 20:22:37,005 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 3016 transitions. Word has length 25 [2021-06-12 20:22:37,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:37,005 INFO L482 AbstractCegarLoop]: Abstraction has 936 states and 3016 transitions. [2021-06-12 20:22:37,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:37,005 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 3016 transitions. [2021-06-12 20:22:37,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:37,006 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:37,006 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:37,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8328,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:37,206 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:37,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:37,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1051515368, now seen corresponding path program 381 times [2021-06-12 20:22:37,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:37,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016656477] [2021-06-12 20:22:37,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:37,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:37,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016656477] [2021-06-12 20:22:37,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016656477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:37,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588517391] [2021-06-12 20:22:37,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:37,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:22:37,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:37,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:37,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:37,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588517391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:37,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:37,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:37,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653773236] [2021-06-12 20:22:37,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:37,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:37,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:37,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:37,911 INFO L87 Difference]: Start difference. First operand 936 states and 3016 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:39,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:39,811 INFO L93 Difference]: Finished difference Result 1792 states and 5483 transitions. [2021-06-12 20:22:39,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 20:22:39,811 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:39,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:39,814 INFO L225 Difference]: With dead ends: 1792 [2021-06-12 20:22:39,814 INFO L226 Difference]: Without dead ends: 1714 [2021-06-12 20:22:39,814 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 1462.4ms TimeCoverageRelationStatistics Valid=560, Invalid=4696, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 20:22:39,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2021-06-12 20:22:39,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1006. [2021-06-12 20:22:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.256716417910448) internal successors, (3273), 1005 states have internal predecessors, (3273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3273 transitions. [2021-06-12 20:22:39,827 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3273 transitions. Word has length 25 [2021-06-12 20:22:39,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:39,827 INFO L482 AbstractCegarLoop]: Abstraction has 1006 states and 3273 transitions. [2021-06-12 20:22:39,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:39,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3273 transitions. [2021-06-12 20:22:39,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:39,828 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:39,828 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:40,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8342 [2021-06-12 20:22:40,028 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:40,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:40,029 INFO L82 PathProgramCache]: Analyzing trace with hash -2058369948, now seen corresponding path program 382 times [2021-06-12 20:22:40,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:40,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264279984] [2021-06-12 20:22:40,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:40,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:40,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264279984] [2021-06-12 20:22:40,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264279984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:40,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430569036] [2021-06-12 20:22:40,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:40,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:22:40,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:40,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:40,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:40,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430569036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:40,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:40,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:40,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712710192] [2021-06-12 20:22:40,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:40,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:40,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:40,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:40,580 INFO L87 Difference]: Start difference. First operand 1006 states and 3273 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:42,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:42,218 INFO L93 Difference]: Finished difference Result 1838 states and 5649 transitions. [2021-06-12 20:22:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 20:22:42,218 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:42,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:42,221 INFO L225 Difference]: With dead ends: 1838 [2021-06-12 20:22:42,221 INFO L226 Difference]: Without dead ends: 1786 [2021-06-12 20:22:42,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1254.3ms TimeCoverageRelationStatistics Valid=686, Invalid=5014, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 20:22:42,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-12 20:22:42,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 993. [2021-06-12 20:22:42,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 3.255040322580645) internal successors, (3229), 992 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:42,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 3229 transitions. [2021-06-12 20:22:42,239 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 3229 transitions. Word has length 25 [2021-06-12 20:22:42,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:42,239 INFO L482 AbstractCegarLoop]: Abstraction has 993 states and 3229 transitions. [2021-06-12 20:22:42,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:42,240 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 3229 transitions. [2021-06-12 20:22:42,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:42,241 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:42,241 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:42,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8455 [2021-06-12 20:22:42,453 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:42,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:42,453 INFO L82 PathProgramCache]: Analyzing trace with hash -298317008, now seen corresponding path program 383 times [2021-06-12 20:22:42,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:42,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835533654] [2021-06-12 20:22:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:42,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:42,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835533654] [2021-06-12 20:22:42,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835533654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:42,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365959852] [2021-06-12 20:22:42,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:42,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:22:42,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:42,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:42,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:42,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365959852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:42,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:42,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:42,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117002970] [2021-06-12 20:22:42,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:42,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:42,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:42,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:42,901 INFO L87 Difference]: Start difference. First operand 993 states and 3229 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:44,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:44,357 INFO L93 Difference]: Finished difference Result 1639 states and 5093 transitions. [2021-06-12 20:22:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 20:22:44,358 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:44,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:44,360 INFO L225 Difference]: With dead ends: 1639 [2021-06-12 20:22:44,360 INFO L226 Difference]: Without dead ends: 1587 [2021-06-12 20:22:44,360 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 938.2ms TimeCoverageRelationStatistics Valid=507, Invalid=4463, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 20:22:44,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-06-12 20:22:44,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 921. [2021-06-12 20:22:44,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 3.222826086956522) internal successors, (2965), 920 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 2965 transitions. [2021-06-12 20:22:44,371 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 2965 transitions. Word has length 25 [2021-06-12 20:22:44,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:44,371 INFO L482 AbstractCegarLoop]: Abstraction has 921 states and 2965 transitions. [2021-06-12 20:22:44,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:44,372 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 2965 transitions. [2021-06-12 20:22:44,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:44,372 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:44,373 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:44,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8485,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:44,575 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:44,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:44,575 INFO L82 PathProgramCache]: Analyzing trace with hash 245276084, now seen corresponding path program 384 times [2021-06-12 20:22:44,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:44,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466239380] [2021-06-12 20:22:44,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:44,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:44,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466239380] [2021-06-12 20:22:44,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466239380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:44,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530385538] [2021-06-12 20:22:44,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:44,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:22:44,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:44,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:44,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:45,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530385538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:45,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:45,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:45,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295076108] [2021-06-12 20:22:45,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:45,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:45,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:45,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:45,143 INFO L87 Difference]: Start difference. First operand 921 states and 2965 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:47,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:47,060 INFO L93 Difference]: Finished difference Result 1809 states and 5531 transitions. [2021-06-12 20:22:47,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 20:22:47,060 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:47,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:47,062 INFO L225 Difference]: With dead ends: 1809 [2021-06-12 20:22:47,062 INFO L226 Difference]: Without dead ends: 1731 [2021-06-12 20:22:47,062 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 1399.5ms TimeCoverageRelationStatistics Valid=524, Invalid=4032, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 20:22:47,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-06-12 20:22:47,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1020. [2021-06-12 20:22:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 3.2688910696761533) internal successors, (3331), 1019 states have internal predecessors, (3331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:47,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3331 transitions. [2021-06-12 20:22:47,076 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3331 transitions. Word has length 25 [2021-06-12 20:22:47,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:47,076 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 3331 transitions. [2021-06-12 20:22:47,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:47,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3331 transitions. [2021-06-12 20:22:47,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:47,077 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:47,077 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:47,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8491,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:47,277 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:47,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:47,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1430358064, now seen corresponding path program 385 times [2021-06-12 20:22:47,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:47,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514034566] [2021-06-12 20:22:47,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:47,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:47,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514034566] [2021-06-12 20:22:47,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514034566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:47,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812787127] [2021-06-12 20:22:47,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:47,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:47,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:48,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812787127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:48,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:48,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:48,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123177691] [2021-06-12 20:22:48,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:48,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:48,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:48,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:48,035 INFO L87 Difference]: Start difference. First operand 1020 states and 3331 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:49,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:49,909 INFO L93 Difference]: Finished difference Result 1883 states and 5773 transitions. [2021-06-12 20:22:49,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 20:22:49,909 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:49,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:49,911 INFO L225 Difference]: With dead ends: 1883 [2021-06-12 20:22:49,911 INFO L226 Difference]: Without dead ends: 1831 [2021-06-12 20:22:49,912 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1875 ImplicationChecksByTransitivity, 1376.9ms TimeCoverageRelationStatistics Valid=725, Invalid=5127, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 20:22:49,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-06-12 20:22:49,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1007. [2021-06-12 20:22:49,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 3.2673956262425445) internal successors, (3287), 1006 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 3287 transitions. [2021-06-12 20:22:49,925 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 3287 transitions. Word has length 25 [2021-06-12 20:22:49,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:49,925 INFO L482 AbstractCegarLoop]: Abstraction has 1007 states and 3287 transitions. [2021-06-12 20:22:49,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:49,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 3287 transitions. [2021-06-12 20:22:49,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:49,926 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:49,926 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:50,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8531 [2021-06-12 20:22:50,126 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:50,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:50,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1104556292, now seen corresponding path program 386 times [2021-06-12 20:22:50,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:50,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341012990] [2021-06-12 20:22:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:50,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:50,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341012990] [2021-06-12 20:22:50,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341012990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:50,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636415665] [2021-06-12 20:22:50,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:50,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:22:50,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:50,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:50,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:50,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636415665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:50,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:50,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:50,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592001582] [2021-06-12 20:22:50,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:50,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:50,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:50,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:50,595 INFO L87 Difference]: Start difference. First operand 1007 states and 3287 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:52,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:52,494 INFO L93 Difference]: Finished difference Result 1638 states and 5108 transitions. [2021-06-12 20:22:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 20:22:52,494 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:52,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:52,496 INFO L225 Difference]: With dead ends: 1638 [2021-06-12 20:22:52,497 INFO L226 Difference]: Without dead ends: 1586 [2021-06-12 20:22:52,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1237.7ms TimeCoverageRelationStatistics Valid=580, Invalid=4532, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 20:22:52,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-06-12 20:22:52,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 992. [2021-06-12 20:22:52,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.265388496468214) internal successors, (3236), 991 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:52,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3236 transitions. [2021-06-12 20:22:52,509 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3236 transitions. Word has length 25 [2021-06-12 20:22:52,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:52,509 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3236 transitions. [2021-06-12 20:22:52,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:52,509 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3236 transitions. [2021-06-12 20:22:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:52,510 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:52,510 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:52,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8663 [2021-06-12 20:22:52,711 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:52,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:52,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1917477296, now seen corresponding path program 387 times [2021-06-12 20:22:52,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:52,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613221129] [2021-06-12 20:22:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:52,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:52,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613221129] [2021-06-12 20:22:52,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613221129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:52,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359515989] [2021-06-12 20:22:52,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:52,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:22:52,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:52,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:52,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:53,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359515989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:53,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:53,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:53,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148541877] [2021-06-12 20:22:53,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:53,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:53,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:53,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:53,165 INFO L87 Difference]: Start difference. First operand 992 states and 3236 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:55,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:55,015 INFO L93 Difference]: Finished difference Result 1573 states and 4896 transitions. [2021-06-12 20:22:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 20:22:55,015 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:55,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:55,017 INFO L225 Difference]: With dead ends: 1573 [2021-06-12 20:22:55,017 INFO L226 Difference]: Without dead ends: 1521 [2021-06-12 20:22:55,017 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 986.7ms TimeCoverageRelationStatistics Valid=509, Invalid=4321, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 20:22:55,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2021-06-12 20:22:55,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 893. [2021-06-12 20:22:55,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.2208520179372195) internal successors, (2873), 892 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2873 transitions. [2021-06-12 20:22:55,028 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2873 transitions. Word has length 25 [2021-06-12 20:22:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:55,028 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 2873 transitions. [2021-06-12 20:22:55,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2873 transitions. [2021-06-12 20:22:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:55,029 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:55,029 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:55,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8669,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:55,230 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:55,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:55,230 INFO L82 PathProgramCache]: Analyzing trace with hash -458628254, now seen corresponding path program 388 times [2021-06-12 20:22:55,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:55,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301881081] [2021-06-12 20:22:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:55,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:55,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301881081] [2021-06-12 20:22:55,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301881081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:55,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034932871] [2021-06-12 20:22:55,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:55,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:22:55,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:55,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:55,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:55,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034932871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:55,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:55,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:55,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069604330] [2021-06-12 20:22:55,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:55,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:55,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:55,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:55,705 INFO L87 Difference]: Start difference. First operand 893 states and 2873 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:57,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:22:57,773 INFO L93 Difference]: Finished difference Result 1474 states and 4523 transitions. [2021-06-12 20:22:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 20:22:57,773 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:22:57,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:22:57,775 INFO L225 Difference]: With dead ends: 1474 [2021-06-12 20:22:57,775 INFO L226 Difference]: Without dead ends: 1353 [2021-06-12 20:22:57,776 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 1164.9ms TimeCoverageRelationStatistics Valid=525, Invalid=5175, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 20:22:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-06-12 20:22:57,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 897. [2021-06-12 20:22:57,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.2154017857142856) internal successors, (2881), 896 states have internal predecessors, (2881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 2881 transitions. [2021-06-12 20:22:57,785 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 2881 transitions. Word has length 25 [2021-06-12 20:22:57,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:22:57,785 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 2881 transitions. [2021-06-12 20:22:57,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:22:57,786 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 2881 transitions. [2021-06-12 20:22:57,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:22:57,786 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:22:57,786 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:22:57,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8675 [2021-06-12 20:22:57,987 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:22:57,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:22:57,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1919174758, now seen corresponding path program 389 times [2021-06-12 20:22:57,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:22:57,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690787319] [2021-06-12 20:22:57,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:22:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:22:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:58,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:22:58,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690787319] [2021-06-12 20:22:58,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690787319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:58,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841852465] [2021-06-12 20:22:58,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:22:58,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:22:58,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:22:58,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:22:58,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:22:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:22:58,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841852465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:22:58,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:22:58,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:22:58,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150654281] [2021-06-12 20:22:58,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:22:58,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:22:58,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:22:58,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:22:58,453 INFO L87 Difference]: Start difference. First operand 897 states and 2881 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:00,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:00,935 INFO L93 Difference]: Finished difference Result 1790 states and 5503 transitions. [2021-06-12 20:23:00,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-12 20:23:00,935 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:23:00,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:00,938 INFO L225 Difference]: With dead ends: 1790 [2021-06-12 20:23:00,938 INFO L226 Difference]: Without dead ends: 1712 [2021-06-12 20:23:00,938 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2808 ImplicationChecksByTransitivity, 1763.7ms TimeCoverageRelationStatistics Valid=782, Invalid=7408, Unknown=0, NotChecked=0, Total=8190 [2021-06-12 20:23:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-06-12 20:23:00,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 938. [2021-06-12 20:23:00,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.2283884738527213) internal successors, (3025), 937 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 3025 transitions. [2021-06-12 20:23:00,950 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 3025 transitions. Word has length 25 [2021-06-12 20:23:00,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:00,950 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 3025 transitions. [2021-06-12 20:23:00,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:00,950 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 3025 transitions. [2021-06-12 20:23:00,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:23:00,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:00,951 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:01,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8688 [2021-06-12 20:23:01,151 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:01,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:01,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1190710558, now seen corresponding path program 390 times [2021-06-12 20:23:01,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:01,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898456176] [2021-06-12 20:23:01,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:01,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:01,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898456176] [2021-06-12 20:23:01,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898456176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:01,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908667872] [2021-06-12 20:23:01,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:01,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:23:01,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:01,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:23:01,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:01,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908667872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:01,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:01,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:23:01,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573171427] [2021-06-12 20:23:01,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:23:01,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:01,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:23:01,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:23:01,634 INFO L87 Difference]: Start difference. First operand 938 states and 3025 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:03,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:03,546 INFO L93 Difference]: Finished difference Result 1596 states and 4957 transitions. [2021-06-12 20:23:03,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-12 20:23:03,547 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:23:03,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:03,548 INFO L225 Difference]: With dead ends: 1596 [2021-06-12 20:23:03,549 INFO L226 Difference]: Without dead ends: 1544 [2021-06-12 20:23:03,549 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 1179.8ms TimeCoverageRelationStatistics Valid=787, Invalid=6523, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 20:23:03,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-12 20:23:03,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 878. [2021-06-12 20:23:03,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.2052451539338653) internal successors, (2811), 877 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2811 transitions. [2021-06-12 20:23:03,560 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2811 transitions. Word has length 25 [2021-06-12 20:23:03,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:03,560 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2811 transitions. [2021-06-12 20:23:03,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:03,560 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2811 transitions. [2021-06-12 20:23:03,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:23:03,561 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:03,561 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:03,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8697 [2021-06-12 20:23:03,762 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:03,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:03,762 INFO L82 PathProgramCache]: Analyzing trace with hash 646241050, now seen corresponding path program 391 times [2021-06-12 20:23:03,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:03,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351513020] [2021-06-12 20:23:03,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:03,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:03,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351513020] [2021-06-12 20:23:03,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351513020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:03,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304248632] [2021-06-12 20:23:03,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:03,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:23:03,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:04,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304248632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:04,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:04,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:23:04,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800352962] [2021-06-12 20:23:04,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:23:04,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:04,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:23:04,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:23:04,348 INFO L87 Difference]: Start difference. First operand 878 states and 2811 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:06,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:06,856 INFO L93 Difference]: Finished difference Result 1955 states and 5962 transitions. [2021-06-12 20:23:06,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 20:23:06,856 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:23:06,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:06,859 INFO L225 Difference]: With dead ends: 1955 [2021-06-12 20:23:06,859 INFO L226 Difference]: Without dead ends: 1877 [2021-06-12 20:23:06,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 1674.2ms TimeCoverageRelationStatistics Valid=707, Invalid=6775, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 20:23:06,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-06-12 20:23:06,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 947. [2021-06-12 20:23:06,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.2389006342494713) internal successors, (3064), 946 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:06,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3064 transitions. [2021-06-12 20:23:06,872 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3064 transitions. Word has length 25 [2021-06-12 20:23:06,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:06,873 INFO L482 AbstractCegarLoop]: Abstraction has 947 states and 3064 transitions. [2021-06-12 20:23:06,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:06,873 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3064 transitions. [2021-06-12 20:23:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:23:06,874 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:06,874 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:07,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8714,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:07,074 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:07,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:07,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1831323030, now seen corresponding path program 392 times [2021-06-12 20:23:07,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:07,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412683092] [2021-06-12 20:23:07,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:07,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:07,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412683092] [2021-06-12 20:23:07,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412683092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:07,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755410694] [2021-06-12 20:23:07,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:07,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:23:07,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:07,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:23:07,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:07,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755410694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:07,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:07,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:23:07,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228737518] [2021-06-12 20:23:07,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:23:07,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:07,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:23:07,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:23:07,642 INFO L87 Difference]: Start difference. First operand 947 states and 3064 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:09,851 INFO L93 Difference]: Finished difference Result 2050 states and 6284 transitions. [2021-06-12 20:23:09,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-12 20:23:09,852 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:23:09,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:09,854 INFO L225 Difference]: With dead ends: 2050 [2021-06-12 20:23:09,854 INFO L226 Difference]: Without dead ends: 1998 [2021-06-12 20:23:09,855 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3104 ImplicationChecksByTransitivity, 1530.0ms TimeCoverageRelationStatistics Valid=912, Invalid=8018, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 20:23:09,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-06-12 20:23:09,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 934. [2021-06-12 20:23:09,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.2368703108252945) internal successors, (3020), 933 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:09,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3020 transitions. [2021-06-12 20:23:09,868 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3020 transitions. Word has length 25 [2021-06-12 20:23:09,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:09,868 INFO L482 AbstractCegarLoop]: Abstraction has 934 states and 3020 transitions. [2021-06-12 20:23:09,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:09,868 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3020 transitions. [2021-06-12 20:23:09,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:23:09,869 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:09,869 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:10,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8767,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:10,069 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:10,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:10,069 INFO L82 PathProgramCache]: Analyzing trace with hash -703591326, now seen corresponding path program 393 times [2021-06-12 20:23:10,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:10,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734714784] [2021-06-12 20:23:10,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:10,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:10,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734714784] [2021-06-12 20:23:10,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734714784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:10,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166717490] [2021-06-12 20:23:10,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:10,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:23:10,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:10,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:23:10,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:10,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166717490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:10,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:10,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:23:10,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805175106] [2021-06-12 20:23:10,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:23:10,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:10,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:23:10,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:23:10,538 INFO L87 Difference]: Start difference. First operand 934 states and 3020 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:12,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:12,640 INFO L93 Difference]: Finished difference Result 1714 states and 5308 transitions. [2021-06-12 20:23:12,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-12 20:23:12,640 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:23:12,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:12,642 INFO L225 Difference]: With dead ends: 1714 [2021-06-12 20:23:12,642 INFO L226 Difference]: Without dead ends: 1662 [2021-06-12 20:23:12,643 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 1169.1ms TimeCoverageRelationStatistics Valid=646, Invalid=6160, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 20:23:12,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-06-12 20:23:12,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 862. [2021-06-12 20:23:12,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.2009291521486642) internal successors, (2756), 861 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:12,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2756 transitions. [2021-06-12 20:23:12,654 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2756 transitions. Word has length 25 [2021-06-12 20:23:12,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:12,654 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2756 transitions. [2021-06-12 20:23:12,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:12,654 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2756 transitions. [2021-06-12 20:23:12,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:23:12,655 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:12,655 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:12,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8809,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:12,855 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:12,856 INFO L82 PathProgramCache]: Analyzing trace with hash -159998234, now seen corresponding path program 394 times [2021-06-12 20:23:12,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:12,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050162786] [2021-06-12 20:23:12,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:12,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:12,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050162786] [2021-06-12 20:23:12,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050162786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:12,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874000464] [2021-06-12 20:23:12,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:13,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:23:13,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:13,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:23:13,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:13,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874000464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:13,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:13,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:23:13,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778526438] [2021-06-12 20:23:13,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:23:13,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:13,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:23:13,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:23:13,537 INFO L87 Difference]: Start difference. First operand 862 states and 2756 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:15,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:15,481 INFO L93 Difference]: Finished difference Result 1736 states and 5285 transitions. [2021-06-12 20:23:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 20:23:15,482 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:23:15,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:15,484 INFO L225 Difference]: With dead ends: 1736 [2021-06-12 20:23:15,484 INFO L226 Difference]: Without dead ends: 1658 [2021-06-12 20:23:15,484 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1161.9ms TimeCoverageRelationStatistics Valid=505, Invalid=4751, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 20:23:15,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-06-12 20:23:15,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 959. [2021-06-12 20:23:15,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 3.2526096033402925) internal successors, (3116), 958 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:15,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 3116 transitions. [2021-06-12 20:23:15,499 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 3116 transitions. Word has length 25 [2021-06-12 20:23:15,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:15,500 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 3116 transitions. [2021-06-12 20:23:15,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:15,500 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 3116 transitions. [2021-06-12 20:23:15,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:23:15,501 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:15,501 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:15,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8815,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:15,701 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:15,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:15,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1025083746, now seen corresponding path program 395 times [2021-06-12 20:23:15,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:15,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650747274] [2021-06-12 20:23:15,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:15,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:15,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650747274] [2021-06-12 20:23:15,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650747274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:15,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950004406] [2021-06-12 20:23:15,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:15,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:23:15,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:15,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:23:15,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:16,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950004406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:16,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:16,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:23:16,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118028756] [2021-06-12 20:23:16,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:23:16,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:16,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:23:16,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:23:16,405 INFO L87 Difference]: Start difference. First operand 959 states and 3116 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:18,115 INFO L93 Difference]: Finished difference Result 1641 states and 5003 transitions. [2021-06-12 20:23:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 20:23:18,115 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:23:18,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:18,117 INFO L225 Difference]: With dead ends: 1641 [2021-06-12 20:23:18,117 INFO L226 Difference]: Without dead ends: 1589 [2021-06-12 20:23:18,117 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 1057.5ms TimeCoverageRelationStatistics Valid=557, Invalid=4413, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 20:23:18,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-06-12 20:23:18,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 946. [2021-06-12 20:23:18,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 3.250793650793651) internal successors, (3072), 945 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 3072 transitions. [2021-06-12 20:23:18,129 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 3072 transitions. Word has length 25 [2021-06-12 20:23:18,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:18,129 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 3072 transitions. [2021-06-12 20:23:18,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:18,129 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 3072 transitions. [2021-06-12 20:23:18,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:23:18,130 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:18,130 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:18,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8874 [2021-06-12 20:23:18,330 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:18,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:18,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1509830610, now seen corresponding path program 396 times [2021-06-12 20:23:18,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:18,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72437930] [2021-06-12 20:23:18,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:18,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:18,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72437930] [2021-06-12 20:23:18,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72437930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:18,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894916259] [2021-06-12 20:23:18,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:18,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:23:18,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:18,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:23:18,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:18,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894916259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:18,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:18,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:23:18,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513661349] [2021-06-12 20:23:18,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:23:18,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:18,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:23:18,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:23:18,826 INFO L87 Difference]: Start difference. First operand 946 states and 3072 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:20,605 INFO L93 Difference]: Finished difference Result 1571 states and 4874 transitions. [2021-06-12 20:23:20,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 20:23:20,605 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:23:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:20,607 INFO L225 Difference]: With dead ends: 1571 [2021-06-12 20:23:20,607 INFO L226 Difference]: Without dead ends: 1519 [2021-06-12 20:23:20,607 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 958.4ms TimeCoverageRelationStatistics Valid=462, Invalid=4368, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 20:23:20,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-06-12 20:23:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 931. [2021-06-12 20:23:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.2483870967741937) internal successors, (3021), 930 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3021 transitions. [2021-06-12 20:23:20,619 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3021 transitions. Word has length 25 [2021-06-12 20:23:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:20,619 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3021 transitions. [2021-06-12 20:23:20,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3021 transitions. [2021-06-12 20:23:20,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:23:20,620 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:20,620 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:20,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8933,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:20,820 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:20,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:20,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1512202978, now seen corresponding path program 397 times [2021-06-12 20:23:20,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:20,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251070701] [2021-06-12 20:23:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:20,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:20,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251070701] [2021-06-12 20:23:20,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251070701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:20,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146723742] [2021-06-12 20:23:20,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:21,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:23:21,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:21,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146723742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:21,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:21,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:23:21,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848321073] [2021-06-12 20:23:21,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:23:21,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:21,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:23:21,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:23:21,279 INFO L87 Difference]: Start difference. First operand 931 states and 3021 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:22,958 INFO L93 Difference]: Finished difference Result 1506 states and 4662 transitions. [2021-06-12 20:23:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 20:23:22,958 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:23:22,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:22,960 INFO L225 Difference]: With dead ends: 1506 [2021-06-12 20:23:22,960 INFO L226 Difference]: Without dead ends: 1454 [2021-06-12 20:23:22,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 995.4ms TimeCoverageRelationStatistics Valid=512, Invalid=4600, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 20:23:22,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-06-12 20:23:22,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 845. [2021-06-12 20:23:22,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2002369668246446) internal successors, (2701), 844 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2701 transitions. [2021-06-12 20:23:22,971 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2701 transitions. Word has length 25 [2021-06-12 20:23:22,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:22,971 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2701 transitions. [2021-06-12 20:23:22,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:22,971 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2701 transitions. [2021-06-12 20:23:22,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:23:22,972 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:22,972 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:23,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8939 [2021-06-12 20:23:23,172 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:23,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1142902924, now seen corresponding path program 398 times [2021-06-12 20:23:23,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:23,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496008932] [2021-06-12 20:23:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:23,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:23,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496008932] [2021-06-12 20:23:23,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496008932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:23,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373698832] [2021-06-12 20:23:23,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:23,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:23:23,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:23,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:23:23,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:23,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373698832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:23,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:23,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:23:23,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688863189] [2021-06-12 20:23:23,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:23:23,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:23,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:23:23,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:23:23,898 INFO L87 Difference]: Start difference. First operand 845 states and 2701 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:26,257 INFO L93 Difference]: Finished difference Result 1597 states and 4791 transitions. [2021-06-12 20:23:26,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 20:23:26,258 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:23:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:26,259 INFO L225 Difference]: With dead ends: 1597 [2021-06-12 20:23:26,259 INFO L226 Difference]: Without dead ends: 1519 [2021-06-12 20:23:26,260 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 1467.9ms TimeCoverageRelationStatistics Valid=605, Invalid=5401, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 20:23:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2021-06-12 20:23:26,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 878. [2021-06-12 20:23:26,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.1904218928164196) internal successors, (2798), 877 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2798 transitions. [2021-06-12 20:23:26,272 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2798 transitions. Word has length 25 [2021-06-12 20:23:26,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:26,272 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2798 transitions. [2021-06-12 20:23:26,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:26,272 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2798 transitions. [2021-06-12 20:23:26,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:23:26,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:26,273 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:26,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8945,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:26,474 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:26,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:26,474 INFO L82 PathProgramCache]: Analyzing trace with hash 42179056, now seen corresponding path program 399 times [2021-06-12 20:23:26,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:26,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006450935] [2021-06-12 20:23:26,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:26,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:26,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006450935] [2021-06-12 20:23:26,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006450935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:26,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390754231] [2021-06-12 20:23:26,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:26,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:23:26,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:26,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:23:26,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:26,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:23:26,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:26,882 INFO L628 ElimStorePlain]: treesize reduction 52, result has 56.3 percent of original size [2021-06-12 20:23:26,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:23:26,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:26,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:23:26,888 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:26,933 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.3 percent of original size [2021-06-12 20:23:26,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-06-12 20:23:26,934 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:122, output treesize:48 [2021-06-12 20:23:27,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:27,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:27,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:23:27,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:27,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:27,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:27,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:23:27,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:27,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:27,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:27,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:23:27,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:27,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:23:27,523 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:27,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:27,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:23:27,527 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:27,657 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-12 20:23:27,657 INFO L628 ElimStorePlain]: treesize reduction 140, result has 46.6 percent of original size [2021-06-12 20:23:27,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:23:27,661 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:27,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:23:27,664 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:27,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:27,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 20:23:27,720 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:368, output treesize:78 [2021-06-12 20:23:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:23:27,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390754231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:27,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:27,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 20:23:27,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492934100] [2021-06-12 20:23:27,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:23:27,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:27,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:23:27,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:23:27,883 INFO L87 Difference]: Start difference. First operand 878 states and 2798 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:30,666 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-06-12 20:23:31,333 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-06-12 20:23:31,645 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-06-12 20:23:31,883 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-06-12 20:23:32,058 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-12 20:23:32,588 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-06-12 20:23:32,794 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-06-12 20:23:33,033 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-06-12 20:23:33,273 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-06-12 20:23:33,489 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2021-06-12 20:23:33,665 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2021-06-12 20:23:33,914 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-06-12 20:23:34,464 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-12 20:23:34,718 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-06-12 20:23:34,879 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-06-12 20:23:35,074 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-06-12 20:23:35,281 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2021-06-12 20:23:35,492 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2021-06-12 20:23:35,641 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-12 20:23:35,957 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-06-12 20:23:36,271 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-12 20:23:36,424 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-06-12 20:23:36,620 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-06-12 20:23:36,980 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2021-06-12 20:23:37,141 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2021-06-12 20:23:37,308 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-06-12 20:23:37,544 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-06-12 20:23:37,739 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-12 20:23:38,045 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-12 20:23:38,447 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-06-12 20:23:38,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:38,475 INFO L93 Difference]: Finished difference Result 2145 states and 6267 transitions. [2021-06-12 20:23:38,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-06-12 20:23:38,475 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:23:38,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:38,478 INFO L225 Difference]: With dead ends: 2145 [2021-06-12 20:23:38,478 INFO L226 Difference]: Without dead ends: 1823 [2021-06-12 20:23:38,479 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7443 ImplicationChecksByTransitivity, 9101.2ms TimeCoverageRelationStatistics Valid=1818, Invalid=19062, Unknown=0, NotChecked=0, Total=20880 [2021-06-12 20:23:38,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2021-06-12 20:23:38,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1016. [2021-06-12 20:23:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 3.2) internal successors, (3248), 1015 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:38,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 3248 transitions. [2021-06-12 20:23:38,491 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 3248 transitions. Word has length 25 [2021-06-12 20:23:38,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:38,492 INFO L482 AbstractCegarLoop]: Abstraction has 1016 states and 3248 transitions. [2021-06-12 20:23:38,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:38,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 3248 transitions. [2021-06-12 20:23:38,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:23:38,493 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:38,493 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:38,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9050,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:38,693 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:38,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:38,693 INFO L82 PathProgramCache]: Analyzing trace with hash 853194326, now seen corresponding path program 400 times [2021-06-12 20:23:38,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:38,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127123518] [2021-06-12 20:23:38,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:23:38,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:38,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127123518] [2021-06-12 20:23:38,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127123518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:38,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686764037] [2021-06-12 20:23:38,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:38,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:23:38,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:38,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:23:38,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:39,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:39,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:39,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:23:39,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:39,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:23:39,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:39,343 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-12 20:23:39,343 INFO L628 ElimStorePlain]: treesize reduction 35, result has 79.2 percent of original size [2021-06-12 20:23:39,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:23:39,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:39,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:23:39,351 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:39,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:39,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:23:39,413 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:39,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:23:39,417 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:39,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:39,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:23:39,476 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:39,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:39,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-12 20:23:39,534 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-12 20:23:39,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:23:39,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:39,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:39,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:23:39,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:39,830 INFO L628 ElimStorePlain]: treesize reduction 35, result has 47.8 percent of original size [2021-06-12 20:23:39,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:23:39,833 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:39,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:39,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:23:39,845 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:79, output treesize:13 [2021-06-12 20:23:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:39,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686764037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:39,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:39,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-12 20:23:39,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794844101] [2021-06-12 20:23:39,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:23:39,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:39,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:23:39,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:23:39,901 INFO L87 Difference]: Start difference. First operand 1016 states and 3248 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:40,422 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-12 20:23:40,714 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-12 20:23:40,850 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-12 20:23:41,119 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-12 20:23:42,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:42,575 INFO L93 Difference]: Finished difference Result 1770 states and 5324 transitions. [2021-06-12 20:23:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:23:42,576 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:23:42,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:42,578 INFO L225 Difference]: With dead ends: 1770 [2021-06-12 20:23:42,578 INFO L226 Difference]: Without dead ends: 1632 [2021-06-12 20:23:42,578 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 2503.3ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:23:42,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-06-12 20:23:42,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1027. [2021-06-12 20:23:42,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.211500974658869) internal successors, (3295), 1026 states have internal predecessors, (3295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3295 transitions. [2021-06-12 20:23:42,590 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3295 transitions. Word has length 25 [2021-06-12 20:23:42,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:42,590 INFO L482 AbstractCegarLoop]: Abstraction has 1027 states and 3295 transitions. [2021-06-12 20:23:42,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3295 transitions. [2021-06-12 20:23:42,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:23:42,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:42,591 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:42,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9150 [2021-06-12 20:23:42,791 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:42,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:42,792 INFO L82 PathProgramCache]: Analyzing trace with hash 561294408, now seen corresponding path program 401 times [2021-06-12 20:23:42,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:42,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089481224] [2021-06-12 20:23:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:23:42,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:42,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089481224] [2021-06-12 20:23:42,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089481224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:42,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389085363] [2021-06-12 20:23:42,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:43,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:23:43,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:43,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:23:43,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:43,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:43,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:43,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:23:43,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:43,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:23:43,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:43,451 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-12 20:23:43,451 INFO L628 ElimStorePlain]: treesize reduction 35, result has 79.2 percent of original size [2021-06-12 20:23:43,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:23:43,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:43,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:43,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:23:43,521 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:43,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:23:43,524 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:43,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:43,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:23:43,587 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:43,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:23:43,591 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:43,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:43,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: 6 dim-0 vars, and 6 xjuncts. [2021-06-12 20:23:43,650 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 8 variables, input treesize:199, output treesize:114 [2021-06-12 20:23:43,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:23:43,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:43,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:43,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:23:43,932 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:44,015 INFO L628 ElimStorePlain]: treesize reduction 78, result has 46.2 percent of original size [2021-06-12 20:23:44,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:23:44,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:44,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:44,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:23:44,075 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:44,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:44,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:23:44,106 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:44,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:44,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:23:44,134 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:157, output treesize:25 [2021-06-12 20:23:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:44,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389085363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:44,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:44,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-12 20:23:44,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706217037] [2021-06-12 20:23:44,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:23:44,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:44,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:23:44,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:23:44,220 INFO L87 Difference]: Start difference. First operand 1027 states and 3295 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:45,315 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-12 20:23:45,526 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-06-12 20:23:45,673 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-06-12 20:23:45,818 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-12 20:23:45,965 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-06-12 20:23:46,140 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2021-06-12 20:23:46,289 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-06-12 20:23:46,453 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-06-12 20:23:46,605 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 54 [2021-06-12 20:23:46,811 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-06-12 20:23:46,966 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-06-12 20:23:47,155 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-06-12 20:23:47,315 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-06-12 20:23:47,521 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-06-12 20:23:47,665 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-06-12 20:23:47,841 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-06-12 20:23:47,989 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-06-12 20:23:48,170 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-06-12 20:23:48,471 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2021-06-12 20:23:48,616 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2021-06-12 20:23:48,824 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-06-12 20:23:48,982 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2021-06-12 20:23:49,441 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 67 [2021-06-12 20:23:49,588 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2021-06-12 20:23:49,784 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2021-06-12 20:23:49,920 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2021-06-12 20:23:50,429 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2021-06-12 20:23:50,581 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2021-06-12 20:23:50,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:50,668 INFO L93 Difference]: Finished difference Result 1975 states and 5843 transitions. [2021-06-12 20:23:50,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:23:50,668 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:23:50,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:50,670 INFO L225 Difference]: With dead ends: 1975 [2021-06-12 20:23:50,670 INFO L226 Difference]: Without dead ends: 1756 [2021-06-12 20:23:50,671 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 5958.1ms TimeCoverageRelationStatistics Valid=692, Invalid=3730, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 20:23:50,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-06-12 20:23:50,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1017. [2021-06-12 20:23:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 3.2096456692913384) internal successors, (3261), 1016 states have internal predecessors, (3261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:50,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3261 transitions. [2021-06-12 20:23:50,683 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3261 transitions. Word has length 25 [2021-06-12 20:23:50,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:50,683 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 3261 transitions. [2021-06-12 20:23:50,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3261 transitions. [2021-06-12 20:23:50,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:23:50,684 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:50,684 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:50,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9178,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:50,884 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:50,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:50,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1910473976, now seen corresponding path program 402 times [2021-06-12 20:23:50,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:50,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710432044] [2021-06-12 20:23:50,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:23:50,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:50,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710432044] [2021-06-12 20:23:50,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710432044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:50,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546998981] [2021-06-12 20:23:50,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:51,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:23:51,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:51,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:23:51,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:51,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:23:51,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:51,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:51,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-06-12 20:23:51,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:51,578 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-06-12 20:23:51,578 INFO L628 ElimStorePlain]: treesize reduction 29, result has 79.3 percent of original size [2021-06-12 20:23:51,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:23:51,582 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:51,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:51,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-12 20:23:51,637 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-06-12 20:23:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:51,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546998981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:51,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:51,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-12 20:23:51,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285073242] [2021-06-12 20:23:51,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:23:51,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:51,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:23:51,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:23:51,832 INFO L87 Difference]: Start difference. First operand 1017 states and 3261 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:52,860 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-06-12 20:23:53,198 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2021-06-12 20:23:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:53,480 INFO L93 Difference]: Finished difference Result 1594 states and 4846 transitions. [2021-06-12 20:23:53,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:23:53,481 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:23:53,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:53,482 INFO L225 Difference]: With dead ends: 1594 [2021-06-12 20:23:53,482 INFO L226 Difference]: Without dead ends: 1465 [2021-06-12 20:23:53,482 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1667.7ms TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:23:53,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-06-12 20:23:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1015. [2021-06-12 20:23:53,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.201183431952663) internal successors, (3246), 1014 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:53,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3246 transitions. [2021-06-12 20:23:53,493 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3246 transitions. Word has length 25 [2021-06-12 20:23:53,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:53,493 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 3246 transitions. [2021-06-12 20:23:53,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:53,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3246 transitions. [2021-06-12 20:23:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:23:53,494 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:53,494 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:53,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9216 [2021-06-12 20:23:53,695 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:53,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:53,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1516618744, now seen corresponding path program 403 times [2021-06-12 20:23:53,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:53,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940631748] [2021-06-12 20:23:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:23:53,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:53,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940631748] [2021-06-12 20:23:53,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940631748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:53,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129176471] [2021-06-12 20:23:53,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:53,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 20:23:53,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:54,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:54,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:23:54,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-06-12 20:23:54,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:54,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-06-12 20:23:54,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:54,342 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-06-12 20:23:54,343 INFO L628 ElimStorePlain]: treesize reduction 6, result has 95.1 percent of original size [2021-06-12 20:23:54,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:23:54,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:54,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-06-12 20:23:54,351 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:23:54,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:23:54,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 5 xjuncts. [2021-06-12 20:23:54,404 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:152, output treesize:100 [2021-06-12 20:23:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:54,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129176471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:54,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:54,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-12 20:23:54,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157251129] [2021-06-12 20:23:54,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:23:54,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:54,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:23:54,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:23:54,612 INFO L87 Difference]: Start difference. First operand 1015 states and 3246 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:56,279 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-06-12 20:23:56,435 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-06-12 20:23:56,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:56,873 INFO L93 Difference]: Finished difference Result 1442 states and 4403 transitions. [2021-06-12 20:23:56,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:23:56,874 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:23:56,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:56,875 INFO L225 Difference]: With dead ends: 1442 [2021-06-12 20:23:56,875 INFO L226 Difference]: Without dead ends: 1293 [2021-06-12 20:23:56,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2191.5ms TimeCoverageRelationStatistics Valid=335, Invalid=1645, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:23:56,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-06-12 20:23:56,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1015. [2021-06-12 20:23:56,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 3.193293885601578) internal successors, (3238), 1014 states have internal predecessors, (3238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:56,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 3238 transitions. [2021-06-12 20:23:56,886 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 3238 transitions. Word has length 25 [2021-06-12 20:23:56,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:56,886 INFO L482 AbstractCegarLoop]: Abstraction has 1015 states and 3238 transitions. [2021-06-12 20:23:56,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:56,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 3238 transitions. [2021-06-12 20:23:56,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:23:56,887 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:56,887 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:57,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9236 [2021-06-12 20:23:57,088 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:57,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:57,088 INFO L82 PathProgramCache]: Analyzing trace with hash 772965990, now seen corresponding path program 404 times [2021-06-12 20:23:57,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:57,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591227749] [2021-06-12 20:23:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:57,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:57,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591227749] [2021-06-12 20:23:57,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591227749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:57,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842710035] [2021-06-12 20:23:57,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:23:57,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:23:57,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:23:57,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:23:57,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:23:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:57,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842710035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:57,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:23:57,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:23:57,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811326123] [2021-06-12 20:23:57,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:23:57,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:23:57,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:23:57,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:23:57,635 INFO L87 Difference]: Start difference. First operand 1015 states and 3238 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:59,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:23:59,639 INFO L93 Difference]: Finished difference Result 1664 states and 5107 transitions. [2021-06-12 20:23:59,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 20:23:59,639 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:23:59,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:23:59,641 INFO L225 Difference]: With dead ends: 1664 [2021-06-12 20:23:59,641 INFO L226 Difference]: Without dead ends: 1584 [2021-06-12 20:23:59,641 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 1244.1ms TimeCoverageRelationStatistics Valid=501, Invalid=4329, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 20:23:59,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-06-12 20:23:59,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 996. [2021-06-12 20:23:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.191959798994975) internal successors, (3176), 995 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:59,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3176 transitions. [2021-06-12 20:23:59,653 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3176 transitions. Word has length 25 [2021-06-12 20:23:59,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:23:59,653 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 3176 transitions. [2021-06-12 20:23:59,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:23:59,653 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3176 transitions. [2021-06-12 20:23:59,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:23:59,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:23:59,654 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:23:59,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9259 [2021-06-12 20:23:59,855 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:23:59,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:23:59,855 INFO L82 PathProgramCache]: Analyzing trace with hash -499967718, now seen corresponding path program 405 times [2021-06-12 20:23:59,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:23:59,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370417118] [2021-06-12 20:23:59,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:23:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:23:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:23:59,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:23:59,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370417118] [2021-06-12 20:23:59,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370417118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:23:59,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939189390] [2021-06-12 20:23:59,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:24:00,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:24:00,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:24:00,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:24:00,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:24:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:00,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939189390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:00,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:24:00,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:24:00,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556851982] [2021-06-12 20:24:00,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:24:00,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:00,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:24:00,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:24:00,395 INFO L87 Difference]: Start difference. First operand 996 states and 3176 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:02,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:24:02,449 INFO L93 Difference]: Finished difference Result 1708 states and 5268 transitions. [2021-06-12 20:24:02,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 20:24:02,449 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:24:02,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:24:02,451 INFO L225 Difference]: With dead ends: 1708 [2021-06-12 20:24:02,451 INFO L226 Difference]: Without dead ends: 1628 [2021-06-12 20:24:02,451 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1508 ImplicationChecksByTransitivity, 1309.0ms TimeCoverageRelationStatistics Valid=555, Invalid=4415, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 20:24:02,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-06-12 20:24:02,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 972. [2021-06-12 20:24:02,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 3.194644696189495) internal successors, (3102), 971 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 3102 transitions. [2021-06-12 20:24:02,463 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 3102 transitions. Word has length 25 [2021-06-12 20:24:02,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:24:02,463 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 3102 transitions. [2021-06-12 20:24:02,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:24:02,463 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 3102 transitions. [2021-06-12 20:24:02,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:24:02,464 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:24:02,464 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:24:02,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9266 [2021-06-12 20:24:02,665 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:24:02,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:24:02,665 INFO L82 PathProgramCache]: Analyzing trace with hash 438157004, now seen corresponding path program 406 times [2021-06-12 20:24:02,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:24:02,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951851946] [2021-06-12 20:24:02,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:24:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:24:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:02,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:24:02,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951851946] [2021-06-12 20:24:02,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951851946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:02,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273759122] [2021-06-12 20:24:02,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:24:02,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:24:02,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:24:02,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:24:02,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:24:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:24:03,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273759122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:24:03,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:24:03,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:24:03,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656783632] [2021-06-12 20:24:03,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:24:03,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:24:03,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:24:03,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:24:03,171 INFO L87 Difference]: Start difference. First operand 972 states and 3102 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-12 20:24:04,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 20:24:05,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9273,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:24:05,162 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 20:24:05,164 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 20:24:05,166 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 20:24:05,166 INFO L202 PluginConnector]: Adding new model nzb-file-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 08:24:05 BasicIcfg [2021-06-12 20:24:05,166 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 20:24:05,166 INFO L168 Benchmark]: Toolchain (without parser) took 830588.82 ms. Allocated memory was 201.3 MB in the beginning and 778.0 MB in the end (delta: 576.7 MB). Free memory was 179.4 MB in the beginning and 502.4 MB in the end (delta: -323.0 MB). Peak memory consumption was 254.8 MB. Max. memory is 8.0 GB. [2021-06-12 20:24:05,167 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 201.3 MB. Free memory is still 180.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:24:05,167 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.03 ms. Allocated memory is still 201.3 MB. Free memory was 179.3 MB in the beginning and 177.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 20:24:05,167 INFO L168 Benchmark]: Boogie Preprocessor took 30.66 ms. Allocated memory is still 201.3 MB. Free memory was 177.8 MB in the beginning and 176.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:24:05,167 INFO L168 Benchmark]: RCFGBuilder took 632.66 ms. Allocated memory is still 201.3 MB. Free memory was 176.6 MB in the beginning and 172.6 MB in the end (delta: 4.0 MB). Peak memory consumption was 26.5 MB. Max. memory is 8.0 GB. [2021-06-12 20:24:05,167 INFO L168 Benchmark]: TraceAbstraction took 829884.42 ms. Allocated memory was 201.3 MB in the beginning and 778.0 MB in the end (delta: 576.7 MB). Free memory was 172.1 MB in the beginning and 502.4 MB in the end (delta: -330.3 MB). Peak memory consumption was 246.2 MB. Max. memory is 8.0 GB. [2021-06-12 20:24:05,167 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 201.3 MB. Free memory is still 180.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.03 ms. Allocated memory is still 201.3 MB. Free memory was 179.3 MB in the beginning and 177.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.66 ms. Allocated memory is still 201.3 MB. Free memory was 177.8 MB in the beginning and 176.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 632.66 ms. Allocated memory is still 201.3 MB. Free memory was 176.6 MB in the beginning and 172.6 MB in the end (delta: 4.0 MB). Peak memory consumption was 26.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 829884.42 ms. Allocated memory was 201.3 MB in the beginning and 778.0 MB in the end (delta: 576.7 MB). Free memory was 172.1 MB in the beginning and 502.4 MB in the end (delta: -330.3 MB). Peak memory consumption was 246.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 143]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (972states) and FLOYD_HOARE automaton (currently 67 states, 22 states before enhancement),while ReachableStatesComputation was computing reachable states (1089 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 829765.4ms, OverallIterations: 423, TraceHistogramMax: 3, EmptinessCheckTime: 468.8ms, AutomataDifference: 493149.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 31.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 38876 SDtfs, 58924 SDslu, 286352 SDs, 0 SdLazy, 286957 SolverSat, 14831 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 130909.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25398 GetRequests, 10559 SyntacticMatches, 343 SemanticMatches, 14496 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196218 ImplicationChecksByTransitivity, 422213.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1764occurred in iteration=303, InterpolantAutomatonStates: 11676, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4664.0ms AutomataMinimizationTime, 422 MinimizatonAttempts, 151154 StatesRemovedByMinimization, 418 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3120.8ms SsaConstructionTime, 7904.3ms SatisfiabilityAnalysisTime, 199765.8ms InterpolantComputationTime, 18805 NumberOfCodeBlocks, 18790 NumberOfCodeBlocksAsserted, 1347 NumberOfCheckSat, 17975 ConstructedInterpolants, 690 QuantifiedInterpolants, 152845 SizeOfPredicates, 2395 NumberOfNonLiveVariables, 44339 ConjunctsInSsa, 8151 ConjunctsInUnsatCore, 830 InterpolantComputations, 16 PerfectInterpolantSequences, 1773/7407 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown