/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/popl20-more/parray-copy.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 22:16:49,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 22:16:49,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 22:16:49,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 22:16:49,226 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 22:16:49,263 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 22:16:49,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 22:16:49,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 22:16:49,264 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 22:16:49,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 22:16:49,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 22:16:49,266 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 22:16:49,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 22:16:49,267 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 22:16:49,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 22:16:49,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 22:16:49,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 22:16:49,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 22:16:49,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 22:16:49,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 22:16:49,268 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 22:16:49,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 22:16:49,269 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 22:16:49,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 22:16:49,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 22:16:49,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 22:16:49,269 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 22:16:49,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 22:16:49,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 22:16:49,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 22:16:49,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 22:16:49,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 22:16:49,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 22:16:49,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 22:16:49,270 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 22:16:49,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 22:16:49,271 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 22:16:49,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 22:16:49,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 22:16:49,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 22:16:49,594 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 22:16:49,597 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 22:16:49,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl [2021-06-12 22:16:49,598 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/parray-copy.wvr.bpl' [2021-06-12 22:16:49,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 22:16:49,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 22:16:49,635 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 22:16:49,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 22:16:49,636 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 22:16:49,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:16:49" (1/1) ... [2021-06-12 22:16:49,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:16:49" (1/1) ... [2021-06-12 22:16:49,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 22:16:49,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 22:16:49,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 22:16:49,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 22:16:49,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:16:49" (1/1) ... [2021-06-12 22:16:49,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:16:49" (1/1) ... [2021-06-12 22:16:49,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:16:49" (1/1) ... [2021-06-12 22:16:49,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:16:49" (1/1) ... [2021-06-12 22:16:49,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:16:49" (1/1) ... [2021-06-12 22:16:49,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:16:49" (1/1) ... [2021-06-12 22:16:49,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:16:49" (1/1) ... [2021-06-12 22:16:49,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 22:16:49,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 22:16:49,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 22:16:49,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 22:16:49,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:16:49" (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 22:16:49,750 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 22:16:49,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 22:16:49,750 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 22:16:49,751 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 22:16:49,751 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 22:16:49,751 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 22:16:49,751 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 22:16:49,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 22:16:49,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 22:16:49,751 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 22:16:49,752 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 22:16:49,752 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 22:16:49,753 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 22:16:49,907 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 22:16:49,907 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 22:16:49,919 INFO L202 PluginConnector]: Adding new model parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:16:49 BoogieIcfgContainer [2021-06-12 22:16:49,919 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 22:16:49,921 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 22:16:49,921 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 22:16:49,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 22:16:49,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:16:49" (1/2) ... [2021-06-12 22:16:49,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@757fa801 and model type parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 10:16:49, skipping insertion in model container [2021-06-12 22:16:49,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parray-copy.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:16:49" (2/2) ... [2021-06-12 22:16:49,939 INFO L111 eAbstractionObserver]: Analyzing ICFG parray-copy.wvr.bpl [2021-06-12 22:16:49,957 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 22:16:49,957 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 22:16:49,957 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 22:16:49,958 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 22:16:50,015 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 22:16:50,039 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 22:16:50,055 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 22:16:50,056 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 22:16:50,056 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 22:16:50,056 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 22:16:50,056 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 22:16:50,056 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 22:16:50,056 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 22:16:50,056 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 22:16:50,064 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 31 transitions, 86 flow [2021-06-12 22:16:50,080 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:50,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:50,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 22:16:50,090 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:50,090 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 22:16:50,091 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:50,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:50,096 INFO L82 PathProgramCache]: Analyzing trace with hash -482426042, now seen corresponding path program 1 times [2021-06-12 22:16:50,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:50,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657257545] [2021-06-12 22:16:50,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:50,255 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 22:16:50,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:50,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657257545] [2021-06-12 22:16:50,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657257545] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:16:50,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:16:50,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 22:16:50,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935711770] [2021-06-12 22:16:50,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 22:16:50,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:50,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 22:16:50,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 22:16:50,276 INFO L87 Difference]: Start difference. First operand has 116 states, 114 states have (on average 2.7719298245614037) internal successors, (316), 115 states have internal predecessors, (316), 0 states have call successors, (0), 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 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:50,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:50,350 INFO L93 Difference]: Finished difference Result 135 states and 376 transitions. [2021-06-12 22:16:50,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 22:16:50,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 22:16:50,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:50,369 INFO L225 Difference]: With dead ends: 135 [2021-06-12 22:16:50,370 INFO L226 Difference]: Without dead ends: 135 [2021-06-12 22:16:50,373 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:16:50,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-12 22:16:50,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-06-12 22:16:50,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.8059701492537314) internal successors, (376), 134 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 22:16:50,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 376 transitions. [2021-06-12 22:16:50,441 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 376 transitions. Word has length 20 [2021-06-12 22:16:50,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:50,442 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 376 transitions. [2021-06-12 22:16:50,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:50,442 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 376 transitions. [2021-06-12 22:16:50,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:16:50,445 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:50,445 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, 1, 1] [2021-06-12 22:16:50,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 22:16:50,446 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:50,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:50,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1659723100, now seen corresponding path program 1 times [2021-06-12 22:16:50,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:50,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416762744] [2021-06-12 22:16:50,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:50,534 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 22:16:50,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:50,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416762744] [2021-06-12 22:16:50,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416762744] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:16:50,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:16:50,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 22:16:50,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999438206] [2021-06-12 22:16:50,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:16:50,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:50,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:16:50,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:16:50,541 INFO L87 Difference]: Start difference. First operand 135 states and 376 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:50,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:50,590 INFO L93 Difference]: Finished difference Result 185 states and 524 transitions. [2021-06-12 22:16:50,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 22:16:50,590 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 22:16:50,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:50,593 INFO L225 Difference]: With dead ends: 185 [2021-06-12 22:16:50,593 INFO L226 Difference]: Without dead ends: 185 [2021-06-12 22:16:50,594 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:16:50,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-06-12 22:16:50,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 160. [2021-06-12 22:16:50,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.830188679245283) internal successors, (450), 159 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:50,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 450 transitions. [2021-06-12 22:16:50,619 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 450 transitions. Word has length 22 [2021-06-12 22:16:50,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:50,619 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 450 transitions. [2021-06-12 22:16:50,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:50,620 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 450 transitions. [2021-06-12 22:16:50,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:16:50,624 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:50,624 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, 1, 1, 1, 1] [2021-06-12 22:16:50,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 22:16:50,624 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:50,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:50,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1666279556, now seen corresponding path program 1 times [2021-06-12 22:16:50,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:50,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902476901] [2021-06-12 22:16:50,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:50,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:50,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902476901] [2021-06-12 22:16:50,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902476901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:50,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417141928] [2021-06-12 22:16:50,919 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 22:16:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:50,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:16:50,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:51,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:16:51,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:51,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:51,224 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 1 xjuncts. [2021-06-12 22:16:51,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:20 [2021-06-12 22:16:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:51,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417141928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:51,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:51,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-12 22:16:51,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52502193] [2021-06-12 22:16:51,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:16:51,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:51,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:16:51,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:16:51,249 INFO L87 Difference]: Start difference. First operand 160 states and 450 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 22:16:51,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:51,819 INFO L93 Difference]: Finished difference Result 395 states and 1116 transitions. [2021-06-12 22:16:51,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:16:51,820 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 22:16:51,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:51,822 INFO L225 Difference]: With dead ends: 395 [2021-06-12 22:16:51,822 INFO L226 Difference]: Without dead ends: 280 [2021-06-12 22:16:51,823 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 642.7ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:16:51,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-12 22:16:51,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 194. [2021-06-12 22:16:51,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.8911917098445596) internal successors, (558), 193 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 558 transitions. [2021-06-12 22:16:51,844 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 558 transitions. Word has length 24 [2021-06-12 22:16:51,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:51,844 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 558 transitions. [2021-06-12 22:16:51,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 22:16:51,845 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 558 transitions. [2021-06-12 22:16:51,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:16:51,846 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:51,846 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, 1, 1, 1, 1] [2021-06-12 22:16:52,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-12 22:16:52,070 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:52,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:52,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1670859648, now seen corresponding path program 2 times [2021-06-12 22:16:52,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:52,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863797433] [2021-06-12 22:16:52,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:52,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:52,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863797433] [2021-06-12 22:16:52,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863797433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:52,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968768049] [2021-06-12 22:16:52,349 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 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 22:16:52,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:16:52,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:52,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:16:52,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:52,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:16:52,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:52,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:52,560 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 1 xjuncts. [2021-06-12 22:16:52,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:23 [2021-06-12 22:16:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:52,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968768049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:52,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:52,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:16:52,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942592815] [2021-06-12 22:16:52,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:16:52,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:52,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:16:52,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:16:52,697 INFO L87 Difference]: Start difference. First operand 194 states and 558 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) 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 22:16:53,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:53,830 INFO L93 Difference]: Finished difference Result 639 states and 1800 transitions. [2021-06-12 22:16:53,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:16:53,831 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) 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 24 [2021-06-12 22:16:53,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:53,834 INFO L225 Difference]: With dead ends: 639 [2021-06-12 22:16:53,834 INFO L226 Difference]: Without dead ends: 546 [2021-06-12 22:16:53,835 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1070.1ms TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:16:53,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-12 22:16:53,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 281. [2021-06-12 22:16:53,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.8892857142857142) internal successors, (809), 280 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 809 transitions. [2021-06-12 22:16:53,846 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 809 transitions. Word has length 24 [2021-06-12 22:16:53,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:53,846 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 809 transitions. [2021-06-12 22:16:53,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) 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 22:16:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 809 transitions. [2021-06-12 22:16:53,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:53,848 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:53,848 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, 1, 1, 1, 1] [2021-06-12 22:16:54,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:54,069 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:54,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:54,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1190941142, now seen corresponding path program 3 times [2021-06-12 22:16:54,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:54,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821828840] [2021-06-12 22:16:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:54,139 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 22:16:54,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:54,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821828840] [2021-06-12 22:16:54,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821828840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:54,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685457285] [2021-06-12 22:16:54,140 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 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 22:16:54,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:16:54,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:54,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:16:54,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:54,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:16:54,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:54,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:54,295 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 1 xjuncts. [2021-06-12 22:16:54,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-12 22:16:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 22:16:54,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685457285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:54,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:54,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 22:16:54,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111310492] [2021-06-12 22:16:54,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:16:54,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:54,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:16:54,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:16:54,439 INFO L87 Difference]: Start difference. First operand 281 states and 809 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 22:16:55,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:55,874 INFO L93 Difference]: Finished difference Result 1001 states and 2814 transitions. [2021-06-12 22:16:55,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:16:55,875 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 26 [2021-06-12 22:16:55,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:55,880 INFO L225 Difference]: With dead ends: 1001 [2021-06-12 22:16:55,880 INFO L226 Difference]: Without dead ends: 966 [2021-06-12 22:16:55,881 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 919.4ms TimeCoverageRelationStatistics Valid=549, Invalid=2757, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:16:55,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-06-12 22:16:55,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 305. [2021-06-12 22:16:55,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.924342105263158) internal successors, (889), 304 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:55,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 889 transitions. [2021-06-12 22:16:55,894 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 889 transitions. Word has length 26 [2021-06-12 22:16:55,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:55,895 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 889 transitions. [2021-06-12 22:16:55,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 22:16:55,895 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 889 transitions. [2021-06-12 22:16:55,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:55,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:55,896 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, 1, 1, 1, 1] [2021-06-12 22:16:56,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:56,113 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:56,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:56,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1175480346, now seen corresponding path program 4 times [2021-06-12 22:16:56,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:56,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62756316] [2021-06-12 22:16:56,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:56,183 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 22:16:56,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:56,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62756316] [2021-06-12 22:16:56,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62756316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:56,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598133138] [2021-06-12 22:16:56,184 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 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 22:16:56,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:16:56,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:56,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:16:56,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:56,324 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 22:16:56,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598133138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:56,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:56,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:16:56,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950756145] [2021-06-12 22:16:56,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:16:56,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:56,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:16:56,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:16:56,326 INFO L87 Difference]: Start difference. First operand 305 states and 889 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 22:16:57,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:57,253 INFO L93 Difference]: Finished difference Result 1201 states and 3376 transitions. [2021-06-12 22:16:57,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:16:57,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 26 [2021-06-12 22:16:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:57,260 INFO L225 Difference]: With dead ends: 1201 [2021-06-12 22:16:57,260 INFO L226 Difference]: Without dead ends: 1201 [2021-06-12 22:16:57,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 564.9ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:16:57,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-12 22:16:57,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 365. [2021-06-12 22:16:57,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 3.0961538461538463) internal successors, (1127), 364 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1127 transitions. [2021-06-12 22:16:57,277 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1127 transitions. Word has length 26 [2021-06-12 22:16:57,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:57,278 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 1127 transitions. [2021-06-12 22:16:57,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 22:16:57,278 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1127 transitions. [2021-06-12 22:16:57,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:57,280 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:57,280 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, 1, 1, 1, 1] [2021-06-12 22:16:57,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:57,497 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:57,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:57,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1693913438, now seen corresponding path program 5 times [2021-06-12 22:16:57,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:57,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033845832] [2021-06-12 22:16:57,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:57,558 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 22:16:57,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:57,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033845832] [2021-06-12 22:16:57,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033845832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:57,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180390556] [2021-06-12 22:16:57,559 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 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 22:16:57,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:16:57,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:57,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:16:57,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:57,698 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 22:16:57,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180390556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:57,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:57,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:16:57,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750751316] [2021-06-12 22:16:57,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:16:57,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:57,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:16:57,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:16:57,701 INFO L87 Difference]: Start difference. First operand 365 states and 1127 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 22:16:58,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:58,569 INFO L93 Difference]: Finished difference Result 1858 states and 5235 transitions. [2021-06-12 22:16:58,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:16:58,573 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 26 [2021-06-12 22:16:58,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:58,585 INFO L225 Difference]: With dead ends: 1858 [2021-06-12 22:16:58,585 INFO L226 Difference]: Without dead ends: 1858 [2021-06-12 22:16:58,586 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 503.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:16:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-06-12 22:16:58,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 388. [2021-06-12 22:16:58,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.1834625322997416) internal successors, (1232), 387 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:58,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1232 transitions. [2021-06-12 22:16:58,612 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1232 transitions. Word has length 26 [2021-06-12 22:16:58,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:58,613 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1232 transitions. [2021-06-12 22:16:58,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 22:16:58,613 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1232 transitions. [2021-06-12 22:16:58,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:58,615 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:58,615 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, 1, 1, 1, 1] [2021-06-12 22:16:58,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-12 22:16:58,837 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:58,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:58,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1481056820, now seen corresponding path program 6 times [2021-06-12 22:16:58,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:58,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401095252] [2021-06-12 22:16:58,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:58,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:58,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401095252] [2021-06-12 22:16:58,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401095252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:58,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246248410] [2021-06-12 22:16:58,888 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 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 22:16:58,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:16:58,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:58,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:16:58,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:59,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246248410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:59,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:59,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:16:59,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636647126] [2021-06-12 22:16:59,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:16:59,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:59,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:16:59,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:16:59,014 INFO L87 Difference]: Start difference. First operand 388 states and 1232 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 22:16:59,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:59,675 INFO L93 Difference]: Finished difference Result 1674 states and 4689 transitions. [2021-06-12 22:16:59,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:16:59,677 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 26 [2021-06-12 22:16:59,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:59,689 INFO L225 Difference]: With dead ends: 1674 [2021-06-12 22:16:59,689 INFO L226 Difference]: Without dead ends: 1670 [2021-06-12 22:16:59,690 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 366.7ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:16:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-06-12 22:16:59,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 402. [2021-06-12 22:16:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.1645885286783044) internal successors, (1269), 401 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1269 transitions. [2021-06-12 22:16:59,714 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1269 transitions. Word has length 26 [2021-06-12 22:16:59,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:59,715 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1269 transitions. [2021-06-12 22:16:59,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 22:16:59,715 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1269 transitions. [2021-06-12 22:16:59,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:59,717 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:59,717 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, 1, 1, 1, 1] [2021-06-12 22:16:59,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:59,941 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:59,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:59,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1751566512, now seen corresponding path program 7 times [2021-06-12 22:16:59,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:59,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897053050] [2021-06-12 22:16:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:59,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:59,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897053050] [2021-06-12 22:16:59,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897053050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:59,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086386692] [2021-06-12 22:16:59,995 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 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 22:17:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:00,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:17:00,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:00,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086386692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:00,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:00,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:17:00,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509893356] [2021-06-12 22:17:00,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:17:00,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:00,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:17:00,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:17:00,137 INFO L87 Difference]: Start difference. First operand 402 states and 1269 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 22:17:00,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:00,857 INFO L93 Difference]: Finished difference Result 1844 states and 5052 transitions. [2021-06-12 22:17:00,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:17:00,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 26 [2021-06-12 22:17:00,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:00,865 INFO L225 Difference]: With dead ends: 1844 [2021-06-12 22:17:00,865 INFO L226 Difference]: Without dead ends: 1844 [2021-06-12 22:17:00,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 407.3ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:17:00,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-06-12 22:17:00,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 400. [2021-06-12 22:17:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 3.1679197994987467) internal successors, (1264), 399 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1264 transitions. [2021-06-12 22:17:00,888 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1264 transitions. Word has length 26 [2021-06-12 22:17:00,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:00,889 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1264 transitions. [2021-06-12 22:17:00,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 22:17:00,889 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1264 transitions. [2021-06-12 22:17:00,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:00,890 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:00,890 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, 1, 1, 1, 1] [2021-06-12 22:17:01,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:01,105 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:01,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:01,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1992513178, now seen corresponding path program 8 times [2021-06-12 22:17:01,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:01,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563829277] [2021-06-12 22:17:01,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:01,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:01,154 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 22:17:01,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:01,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563829277] [2021-06-12 22:17:01,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563829277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:01,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929791935] [2021-06-12 22:17:01,154 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 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 22:17:01,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:17:01,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:01,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:17:01,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:01,291 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 22:17:01,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929791935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:01,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:01,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:17:01,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658205063] [2021-06-12 22:17:01,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:17:01,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:01,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:17:01,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:17:01,292 INFO L87 Difference]: Start difference. First operand 400 states and 1264 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 22:17:01,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:01,761 INFO L93 Difference]: Finished difference Result 1308 states and 3890 transitions. [2021-06-12 22:17:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:17:01,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 26 [2021-06-12 22:17:01,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:01,767 INFO L225 Difference]: With dead ends: 1308 [2021-06-12 22:17:01,767 INFO L226 Difference]: Without dead ends: 1308 [2021-06-12 22:17:01,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 304.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:17:01,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-12 22:17:01,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 415. [2021-06-12 22:17:01,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.2294685990338166) internal successors, (1337), 414 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:01,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-06-12 22:17:01,784 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 26 [2021-06-12 22:17:01,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:01,784 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-06-12 22:17:01,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 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 22:17:01,784 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-06-12 22:17:01,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:01,785 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:01,786 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, 1, 1, 1, 1] [2021-06-12 22:17:02,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 22:17:02,005 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:02,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:02,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1182457080, now seen corresponding path program 9 times [2021-06-12 22:17:02,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:02,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437887772] [2021-06-12 22:17:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:02,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:02,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437887772] [2021-06-12 22:17:02,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437887772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:02,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393957474] [2021-06-12 22:17:02,059 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 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 22:17:02,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:17:02,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:02,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:17:02,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:02,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393957474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:02,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:02,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:17:02,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071838021] [2021-06-12 22:17:02,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:17:02,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:02,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:17:02,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:17:02,215 INFO L87 Difference]: Start difference. First operand 415 states and 1337 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 22:17:02,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:02,617 INFO L93 Difference]: Finished difference Result 1124 states and 3354 transitions. [2021-06-12 22:17:02,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:17:02,618 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 26 [2021-06-12 22:17:02,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:02,623 INFO L225 Difference]: With dead ends: 1124 [2021-06-12 22:17:02,623 INFO L226 Difference]: Without dead ends: 1120 [2021-06-12 22:17:02,623 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:17:02,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-06-12 22:17:02,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 421. [2021-06-12 22:17:02,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 3.2333333333333334) internal successors, (1358), 420 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:02,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1358 transitions. [2021-06-12 22:17:02,637 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1358 transitions. Word has length 26 [2021-06-12 22:17:02,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:02,637 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1358 transitions. [2021-06-12 22:17:02,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 22:17:02,638 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1358 transitions. [2021-06-12 22:17:02,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:02,639 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:02,639 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, 1, 1, 1, 1] [2021-06-12 22:17:02,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:02,845 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:02,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:02,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1452966772, now seen corresponding path program 10 times [2021-06-12 22:17:02,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:02,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706386276] [2021-06-12 22:17:02,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:02,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:02,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706386276] [2021-06-12 22:17:02,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706386276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:02,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684405084] [2021-06-12 22:17:02,905 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 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 22:17:02,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:17:02,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:02,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:17:02,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:03,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684405084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:03,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:03,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:17:03,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002899988] [2021-06-12 22:17:03,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:17:03,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:03,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:17:03,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:17:03,009 INFO L87 Difference]: Start difference. First operand 421 states and 1358 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 22:17:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:03,398 INFO L93 Difference]: Finished difference Result 1207 states and 3549 transitions. [2021-06-12 22:17:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:17:03,399 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 26 [2021-06-12 22:17:03,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:03,403 INFO L225 Difference]: With dead ends: 1207 [2021-06-12 22:17:03,403 INFO L226 Difference]: Without dead ends: 1207 [2021-06-12 22:17:03,404 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:17:03,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-06-12 22:17:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 415. [2021-06-12 22:17:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.2294685990338166) internal successors, (1337), 414 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1337 transitions. [2021-06-12 22:17:03,433 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1337 transitions. Word has length 26 [2021-06-12 22:17:03,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:03,433 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1337 transitions. [2021-06-12 22:17:03,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 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 22:17:03,434 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1337 transitions. [2021-06-12 22:17:03,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:03,435 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:03,435 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, 1, 1, 1, 1] [2021-06-12 22:17:03,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:03,649 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:03,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:03,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2037994958, now seen corresponding path program 11 times [2021-06-12 22:17:03,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:03,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139820479] [2021-06-12 22:17:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:03,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:03,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139820479] [2021-06-12 22:17:03,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139820479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:03,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723421032] [2021-06-12 22:17:03,700 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 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 22:17:03,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:17:03,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:03,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:17:03,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:03,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723421032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:03,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:03,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:17:03,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000355663] [2021-06-12 22:17:03,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:17:03,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:03,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:17:03,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:17:03,824 INFO L87 Difference]: Start difference. First operand 415 states and 1337 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 22:17:04,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:04,040 INFO L93 Difference]: Finished difference Result 824 states and 2512 transitions. [2021-06-12 22:17:04,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:17:04,040 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 26 [2021-06-12 22:17:04,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:04,043 INFO L225 Difference]: With dead ends: 824 [2021-06-12 22:17:04,043 INFO L226 Difference]: Without dead ends: 812 [2021-06-12 22:17:04,043 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:17:04,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-12 22:17:04,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 433. [2021-06-12 22:17:04,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 3.2175925925925926) internal successors, (1390), 432 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:04,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1390 transitions. [2021-06-12 22:17:04,055 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1390 transitions. Word has length 26 [2021-06-12 22:17:04,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:04,055 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1390 transitions. [2021-06-12 22:17:04,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 22:17:04,056 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1390 transitions. [2021-06-12 22:17:04,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:04,057 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:04,057 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, 1, 1, 1, 1] [2021-06-12 22:17:04,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-12 22:17:04,273 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:04,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:04,273 INFO L82 PathProgramCache]: Analyzing trace with hash 545990226, now seen corresponding path program 12 times [2021-06-12 22:17:04,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:04,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458227909] [2021-06-12 22:17:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:04,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:04,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458227909] [2021-06-12 22:17:04,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458227909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:04,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028189961] [2021-06-12 22:17:04,323 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 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 22:17:04,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:17:04,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:04,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:17:04,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:04,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028189961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:04,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:04,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:17:04,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333044367] [2021-06-12 22:17:04,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:17:04,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:04,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:17:04,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:17:04,414 INFO L87 Difference]: Start difference. First operand 433 states and 1390 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 22:17:04,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:04,720 INFO L93 Difference]: Finished difference Result 999 states and 2955 transitions. [2021-06-12 22:17:04,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:17:04,721 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 26 [2021-06-12 22:17:04,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:04,725 INFO L225 Difference]: With dead ends: 999 [2021-06-12 22:17:04,725 INFO L226 Difference]: Without dead ends: 995 [2021-06-12 22:17:04,725 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:17:04,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-06-12 22:17:04,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 472. [2021-06-12 22:17:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 3.2229299363057327) internal successors, (1518), 471 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1518 transitions. [2021-06-12 22:17:04,740 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1518 transitions. Word has length 26 [2021-06-12 22:17:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:04,740 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1518 transitions. [2021-06-12 22:17:04,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 22:17:04,741 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1518 transitions. [2021-06-12 22:17:04,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:04,742 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:04,742 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, 1, 1, 1, 1] [2021-06-12 22:17:04,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 22:17:04,957 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:04,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:04,957 INFO L82 PathProgramCache]: Analyzing trace with hash 816499918, now seen corresponding path program 13 times [2021-06-12 22:17:04,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:04,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669220355] [2021-06-12 22:17:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:04,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:04,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669220355] [2021-06-12 22:17:04,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669220355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:04,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6061168] [2021-06-12 22:17:04,995 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 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 22:17:05,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:05,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:17:05,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:05,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6061168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:05,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:05,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:17:05,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074714815] [2021-06-12 22:17:05,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:17:05,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:05,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:17:05,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:17:05,120 INFO L87 Difference]: Start difference. First operand 472 states and 1518 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 22:17:05,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:05,493 INFO L93 Difference]: Finished difference Result 1053 states and 3099 transitions. [2021-06-12 22:17:05,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:17:05,493 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 26 [2021-06-12 22:17:05,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:05,497 INFO L225 Difference]: With dead ends: 1053 [2021-06-12 22:17:05,497 INFO L226 Difference]: Without dead ends: 1053 [2021-06-12 22:17:05,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:17:05,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-06-12 22:17:05,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 464. [2021-06-12 22:17:05,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.2311015118790496) internal successors, (1496), 463 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:05,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1496 transitions. [2021-06-12 22:17:05,511 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1496 transitions. Word has length 26 [2021-06-12 22:17:05,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:05,511 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1496 transitions. [2021-06-12 22:17:05,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 22:17:05,511 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1496 transitions. [2021-06-12 22:17:05,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:05,513 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:05,513 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, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:05,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 22:17:05,725 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:05,725 INFO L82 PathProgramCache]: Analyzing trace with hash -980752764, now seen corresponding path program 1 times [2021-06-12 22:17:05,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:05,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458712524] [2021-06-12 22:17:05,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:06,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:06,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458712524] [2021-06-12 22:17:06,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458712524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:06,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531223716] [2021-06-12 22:17:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order 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 22:17:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:06,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 22:17:06,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:06,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:17:06,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:06,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:06,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:17:06,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:20 [2021-06-12 22:17:06,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:06,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:17:06,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:06,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:06,336 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 1 xjuncts. [2021-06-12 22:17:06,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:27 [2021-06-12 22:17:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:06,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531223716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:06,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:06,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 22:17:06,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216810037] [2021-06-12 22:17:06,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:17:06,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:06,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:17:06,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:17:06,432 INFO L87 Difference]: Start difference. First operand 464 states and 1496 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:06,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:06,939 INFO L93 Difference]: Finished difference Result 853 states and 2545 transitions. [2021-06-12 22:17:06,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:17:06,940 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:17:06,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:06,943 INFO L225 Difference]: With dead ends: 853 [2021-06-12 22:17:06,943 INFO L226 Difference]: Without dead ends: 766 [2021-06-12 22:17:06,944 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 630.4ms TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:17:06,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-06-12 22:17:06,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 490. [2021-06-12 22:17:06,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.216768916155419) internal successors, (1573), 489 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:06,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1573 transitions. [2021-06-12 22:17:06,956 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1573 transitions. Word has length 28 [2021-06-12 22:17:06,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:06,956 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1573 transitions. [2021-06-12 22:17:06,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:06,956 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1573 transitions. [2021-06-12 22:17:06,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:06,957 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:06,958 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, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:07,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:07,173 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:07,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:07,173 INFO L82 PathProgramCache]: Analyzing trace with hash 735427332, now seen corresponding path program 2 times [2021-06-12 22:17:07,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:07,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141288948] [2021-06-12 22:17:07,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:07,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:07,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141288948] [2021-06-12 22:17:07,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141288948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:07,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451677971] [2021-06-12 22:17:07,524 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 22:17:07,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:17:07,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:07,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:17:07,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:07,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:17:07,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:07,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:07,666 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 1 xjuncts. [2021-06-12 22:17:07,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-12 22:17:07,747 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-12 22:17:07,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:17:07,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:07,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:07,759 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 1 xjuncts. [2021-06-12 22:17:07,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:29 [2021-06-12 22:17:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 22:17:07,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451677971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:07,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:07,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-12 22:17:07,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948968642] [2021-06-12 22:17:07,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:17:07,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:07,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:17:07,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:17:07,867 INFO L87 Difference]: Start difference. First operand 490 states and 1573 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:09,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:09,373 INFO L93 Difference]: Finished difference Result 1130 states and 3345 transitions. [2021-06-12 22:17:09,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:17:09,373 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:17:09,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:09,376 INFO L225 Difference]: With dead ends: 1130 [2021-06-12 22:17:09,376 INFO L226 Difference]: Without dead ends: 998 [2021-06-12 22:17:09,377 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1444.3ms TimeCoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 22:17:09,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-06-12 22:17:09,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 537. [2021-06-12 22:17:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.1940298507462686) internal successors, (1712), 536 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:09,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1712 transitions. [2021-06-12 22:17:09,390 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1712 transitions. Word has length 28 [2021-06-12 22:17:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:09,391 INFO L482 AbstractCegarLoop]: Abstraction has 537 states and 1712 transitions. [2021-06-12 22:17:09,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:09,391 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1712 transitions. [2021-06-12 22:17:09,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:09,392 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:09,392 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:09,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 22:17:09,609 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:09,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1417721472, now seen corresponding path program 14 times [2021-06-12 22:17:09,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:09,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45108129] [2021-06-12 22:17:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:09,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:09,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45108129] [2021-06-12 22:17:09,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45108129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:09,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036433207] [2021-06-12 22:17:09,964 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 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 22:17:09,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:17:09,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:09,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:17:09,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:10,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:17:10,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:10,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:10,099 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 1 xjuncts. [2021-06-12 22:17:10,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:22 [2021-06-12 22:17:10,147 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-12 22:17:10,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:17:10,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:10,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:10,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:17:10,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-06-12 22:17:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 22:17:10,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036433207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:10,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:10,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-12 22:17:10,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227726550] [2021-06-12 22:17:10,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:17:10,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:10,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:17:10,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:17:10,265 INFO L87 Difference]: Start difference. First operand 537 states and 1712 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:11,582 INFO L93 Difference]: Finished difference Result 1024 states and 3050 transitions. [2021-06-12 22:17:11,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:17:11,582 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:17:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:11,585 INFO L225 Difference]: With dead ends: 1024 [2021-06-12 22:17:11,585 INFO L226 Difference]: Without dead ends: 946 [2021-06-12 22:17:11,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1235.7ms TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:17:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-12 22:17:11,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 637. [2021-06-12 22:17:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.10062893081761) internal successors, (1972), 636 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1972 transitions. [2021-06-12 22:17:11,600 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1972 transitions. Word has length 28 [2021-06-12 22:17:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:11,600 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 1972 transitions. [2021-06-12 22:17:11,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:11,600 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1972 transitions. [2021-06-12 22:17:11,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:11,602 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:11,602 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, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:11,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 22:17:11,817 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:11,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:11,817 INFO L82 PathProgramCache]: Analyzing trace with hash 916230348, now seen corresponding path program 3 times [2021-06-12 22:17:11,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:11,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62746038] [2021-06-12 22:17:11,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:12,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:12,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62746038] [2021-06-12 22:17:12,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62746038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:12,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36075551] [2021-06-12 22:17:12,174 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 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 22:17:12,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:17:12,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:12,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:17:12,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:12,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:17:12,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:12,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:12,304 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 1 xjuncts. [2021-06-12 22:17:12,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-12 22:17:12,352 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-12 22:17:12,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:17:12,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:12,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:12,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:17:12,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-06-12 22:17:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 22:17:12,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36075551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:12,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:12,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-12 22:17:12,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862389960] [2021-06-12 22:17:12,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:17:12,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:12,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:17:12,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:17:12,543 INFO L87 Difference]: Start difference. First operand 637 states and 1972 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:15,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:15,146 INFO L93 Difference]: Finished difference Result 1838 states and 5313 transitions. [2021-06-12 22:17:15,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:17:15,147 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:17:15,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:15,150 INFO L225 Difference]: With dead ends: 1838 [2021-06-12 22:17:15,150 INFO L226 Difference]: Without dead ends: 1655 [2021-06-12 22:17:15,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 2093.7ms TimeCoverageRelationStatistics Valid=569, Invalid=3091, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:17:15,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-06-12 22:17:15,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 692. [2021-06-12 22:17:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 3.1577424023154848) internal successors, (2182), 691 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:15,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2182 transitions. [2021-06-12 22:17:15,174 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2182 transitions. Word has length 28 [2021-06-12 22:17:15,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:15,175 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2182 transitions. [2021-06-12 22:17:15,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:15,175 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2182 transitions. [2021-06-12 22:17:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:15,176 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:15,176 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:15,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:15,398 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:15,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:15,399 INFO L82 PathProgramCache]: Analyzing trace with hash 937707268, now seen corresponding path program 15 times [2021-06-12 22:17:15,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:15,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576303888] [2021-06-12 22:17:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:15,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:15,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576303888] [2021-06-12 22:17:15,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576303888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:15,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691551732] [2021-06-12 22:17:15,698 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 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 22:17:15,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:17:15,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:15,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:17:15,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:15,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:17:15,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:15,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:15,826 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 1 xjuncts. [2021-06-12 22:17:15,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-12 22:17:15,914 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-12 22:17:15,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:17:15,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:15,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:15,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:17:15,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:34 [2021-06-12 22:17:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 22:17:16,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691551732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:16,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:16,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-06-12 22:17:16,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318103883] [2021-06-12 22:17:16,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:17:16,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:16,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:17:16,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:17:16,038 INFO L87 Difference]: Start difference. First operand 692 states and 2182 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:17,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:17,322 INFO L93 Difference]: Finished difference Result 1136 states and 3439 transitions. [2021-06-12 22:17:17,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:17:17,322 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:17:17,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:17,325 INFO L225 Difference]: With dead ends: 1136 [2021-06-12 22:17:17,325 INFO L226 Difference]: Without dead ends: 1058 [2021-06-12 22:17:17,326 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1227.4ms TimeCoverageRelationStatistics Valid=406, Invalid=2044, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:17:17,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-12 22:17:17,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 680. [2021-06-12 22:17:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.1723122238586154) internal successors, (2154), 679 states have internal predecessors, (2154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2154 transitions. [2021-06-12 22:17:17,341 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2154 transitions. Word has length 28 [2021-06-12 22:17:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:17,341 INFO L482 AbstractCegarLoop]: Abstraction has 680 states and 2154 transitions. [2021-06-12 22:17:17,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:17,341 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2154 transitions. [2021-06-12 22:17:17,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:17,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:17,343 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:17,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:17,565 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:17,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:17,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1490293068, now seen corresponding path program 16 times [2021-06-12 22:17:17,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:17,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391502606] [2021-06-12 22:17:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:17,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:17,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391502606] [2021-06-12 22:17:17,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391502606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:17,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222345579] [2021-06-12 22:17:17,915 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 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 22:17:17,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:17:17,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:17,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:17:17,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:18,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-12 22:17:18,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:18,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:18,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:17:18,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-06-12 22:17:18,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:18,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-12 22:17:18,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:18,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:18,209 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 1 xjuncts. [2021-06-12 22:17:18,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:31 [2021-06-12 22:17:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:18,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222345579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:18,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:18,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-06-12 22:17:18,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924737889] [2021-06-12 22:17:18,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:17:18,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:18,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:17:18,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:17:18,282 INFO L87 Difference]: Start difference. First operand 680 states and 2154 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:20,396 INFO L93 Difference]: Finished difference Result 1629 states and 4937 transitions. [2021-06-12 22:17:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:17:20,396 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:17:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:20,400 INFO L225 Difference]: With dead ends: 1629 [2021-06-12 22:17:20,400 INFO L226 Difference]: Without dead ends: 1293 [2021-06-12 22:17:20,401 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 1974.7ms TimeCoverageRelationStatistics Valid=735, Invalid=3425, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:17:20,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-06-12 22:17:20,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 920. [2021-06-12 22:17:20,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 3.263329706202394) internal successors, (2999), 919 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:20,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2999 transitions. [2021-06-12 22:17:20,424 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2999 transitions. Word has length 28 [2021-06-12 22:17:20,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:20,424 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 2999 transitions. [2021-06-12 22:17:20,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:20,424 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2999 transitions. [2021-06-12 22:17:20,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:20,426 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:20,426 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, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:20,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:20,648 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:20,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:20,648 INFO L82 PathProgramCache]: Analyzing trace with hash -836691140, now seen corresponding path program 4 times [2021-06-12 22:17:20,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:20,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948098316] [2021-06-12 22:17:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:21,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:21,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948098316] [2021-06-12 22:17:21,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948098316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:21,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566306954] [2021-06-12 22:17:21,076 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 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 22:17:21,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:17:21,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:21,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:17:21,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:21,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:17:21,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:21,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:21,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:17:21,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:20 [2021-06-12 22:17:21,289 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-12 22:17:21,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:17:21,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:21,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:21,300 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 1 xjuncts. [2021-06-12 22:17:21,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:29 [2021-06-12 22:17:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:17:21,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566306954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:21,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:21,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-06-12 22:17:21,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709545284] [2021-06-12 22:17:21,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:17:21,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:21,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:17:21,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:17:21,406 INFO L87 Difference]: Start difference. First operand 920 states and 2999 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:22,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:22,660 INFO L93 Difference]: Finished difference Result 1908 states and 5865 transitions. [2021-06-12 22:17:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:17:22,660 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:17:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:22,664 INFO L225 Difference]: With dead ends: 1908 [2021-06-12 22:17:22,664 INFO L226 Difference]: Without dead ends: 1792 [2021-06-12 22:17:22,665 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1423.1ms TimeCoverageRelationStatistics Valid=320, Invalid=1402, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:17:22,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2021-06-12 22:17:22,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1049. [2021-06-12 22:17:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.25381679389313) internal successors, (3410), 1048 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:22,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3410 transitions. [2021-06-12 22:17:22,691 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3410 transitions. Word has length 28 [2021-06-12 22:17:22,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:22,691 INFO L482 AbstractCegarLoop]: Abstraction has 1049 states and 3410 transitions. [2021-06-12 22:17:22,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:22,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3410 transitions. [2021-06-12 22:17:22,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:22,694 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:22,694 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, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:22,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 22:17:22,917 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:22,917 INFO L82 PathProgramCache]: Analyzing trace with hash -556203584, now seen corresponding path program 5 times [2021-06-12 22:17:22,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:22,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624403723] [2021-06-12 22:17:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:23,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:23,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624403723] [2021-06-12 22:17:23,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624403723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:23,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123253259] [2021-06-12 22:17:23,171 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 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 22:17:23,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:17:23,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:23,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 22:17:23,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:23,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:17:23,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:23,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:23,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:17:23,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-06-12 22:17:23,329 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-12 22:17:23,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:17:23,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:23,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:23,341 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 1 xjuncts. [2021-06-12 22:17:23,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:32 [2021-06-12 22:17:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:23,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123253259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:23,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:23,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 22:17:23,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22188614] [2021-06-12 22:17:23,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:17:23,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:23,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:17:23,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:17:23,502 INFO L87 Difference]: Start difference. First operand 1049 states and 3410 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:25,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:25,525 INFO L93 Difference]: Finished difference Result 1982 states and 6072 transitions. [2021-06-12 22:17:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:17:25,525 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:17:25,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:25,528 INFO L225 Difference]: With dead ends: 1982 [2021-06-12 22:17:25,528 INFO L226 Difference]: Without dead ends: 1756 [2021-06-12 22:17:25,529 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1830.5ms TimeCoverageRelationStatistics Valid=554, Invalid=2416, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 22:17:25,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-06-12 22:17:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1070. [2021-06-12 22:17:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 3.2198316183348923) internal successors, (3442), 1069 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:25,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 3442 transitions. [2021-06-12 22:17:25,554 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 3442 transitions. Word has length 28 [2021-06-12 22:17:25,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:25,555 INFO L482 AbstractCegarLoop]: Abstraction has 1070 states and 3442 transitions. [2021-06-12 22:17:25,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:25,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 3442 transitions. [2021-06-12 22:17:25,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:25,557 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:25,557 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, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:25,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 22:17:25,772 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:25,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:25,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1520630964, now seen corresponding path program 6 times [2021-06-12 22:17:25,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:25,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581864281] [2021-06-12 22:17:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:26,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:26,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581864281] [2021-06-12 22:17:26,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581864281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:26,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203057455] [2021-06-12 22:17:26,183 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 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 22:17:26,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:17:26,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:26,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 22:17:26,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:26,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:17:26,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:26,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:26,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:17:26,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-12 22:17:26,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:26,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:17:26,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:26,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:26,382 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 1 xjuncts. [2021-06-12 22:17:26,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-06-12 22:17:26,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:26,458 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-12 22:17:26,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-12 22:17:26,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:26,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:26,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:17:26,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-06-12 22:17:26,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:26,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203057455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:26,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:26,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-12 22:17:26,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504390486] [2021-06-12 22:17:26,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:17:26,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:26,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:17:26,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:17:26,665 INFO L87 Difference]: Start difference. First operand 1070 states and 3442 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:28,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:28,214 INFO L93 Difference]: Finished difference Result 2007 states and 6151 transitions. [2021-06-12 22:17:28,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:17:28,215 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:17:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:28,219 INFO L225 Difference]: With dead ends: 2007 [2021-06-12 22:17:28,219 INFO L226 Difference]: Without dead ends: 1842 [2021-06-12 22:17:28,220 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1508.5ms TimeCoverageRelationStatistics Valid=307, Invalid=2045, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:17:28,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-06-12 22:17:28,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1157. [2021-06-12 22:17:28,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 3.222318339100346) internal successors, (3725), 1156 states have internal predecessors, (3725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 3725 transitions. [2021-06-12 22:17:28,246 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 3725 transitions. Word has length 28 [2021-06-12 22:17:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:28,247 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 3725 transitions. [2021-06-12 22:17:28,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 3725 transitions. [2021-06-12 22:17:28,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:28,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:28,249 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, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:28,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:28,465 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:28,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:28,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1530790852, now seen corresponding path program 7 times [2021-06-12 22:17:28,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:28,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099379777] [2021-06-12 22:17:28,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:28,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:28,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099379777] [2021-06-12 22:17:28,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099379777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:28,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925274455] [2021-06-12 22:17:28,834 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 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 22:17:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:28,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 22:17:28,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:28,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:17:28,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:28,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:28,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:17:28,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-12 22:17:29,019 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-12 22:17:29,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:17:29,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:29,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:29,031 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 1 xjuncts. [2021-06-12 22:17:29,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:37 [2021-06-12 22:17:29,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:29,094 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-12 22:17:29,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-12 22:17:29,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:29,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:29,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:17:29,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:44 [2021-06-12 22:17:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:29,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925274455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:29,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:29,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 22:17:29,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106925112] [2021-06-12 22:17:29,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:17:29,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:29,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:17:29,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:17:29,287 INFO L87 Difference]: Start difference. First operand 1157 states and 3725 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:30,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:30,080 INFO L93 Difference]: Finished difference Result 2244 states and 7072 transitions. [2021-06-12 22:17:30,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:17:30,081 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:17:30,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:30,086 INFO L225 Difference]: With dead ends: 2244 [2021-06-12 22:17:30,086 INFO L226 Difference]: Without dead ends: 1887 [2021-06-12 22:17:30,086 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 882.2ms TimeCoverageRelationStatistics Valid=247, Invalid=1085, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:17:30,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2021-06-12 22:17:30,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1173. [2021-06-12 22:17:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 3.2380546075085324) internal successors, (3795), 1172 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:30,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3795 transitions. [2021-06-12 22:17:30,112 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3795 transitions. Word has length 28 [2021-06-12 22:17:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:30,112 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 3795 transitions. [2021-06-12 22:17:30,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:30,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3795 transitions. [2021-06-12 22:17:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:17:30,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:30,115 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, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:30,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 22:17:30,329 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:30,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:30,329 INFO L82 PathProgramCache]: Analyzing trace with hash 55569732, now seen corresponding path program 8 times [2021-06-12 22:17:30,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:30,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537778859] [2021-06-12 22:17:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:30,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:30,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537778859] [2021-06-12 22:17:30,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537778859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:30,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406995187] [2021-06-12 22:17:30,777 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 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 22:17:30,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:17:30,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:30,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:17:30,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:30,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:17:30,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:30,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:30,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:17:30,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-06-12 22:17:30,943 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-12 22:17:30,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:17:30,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:30,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:30,954 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 1 xjuncts. [2021-06-12 22:17:30,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:29 [2021-06-12 22:17:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:31,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406995187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:31,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:31,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-06-12 22:17:31,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480204415] [2021-06-12 22:17:31,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:17:31,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:31,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:17:31,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:17:31,052 INFO L87 Difference]: Start difference. First operand 1173 states and 3795 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:31,686 INFO L93 Difference]: Finished difference Result 2027 states and 6489 transitions. [2021-06-12 22:17:31,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:17:31,687 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:17:31,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:31,689 INFO L225 Difference]: With dead ends: 2027 [2021-06-12 22:17:31,689 INFO L226 Difference]: Without dead ends: 1705 [2021-06-12 22:17:31,689 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 818.9ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:17:31,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-06-12 22:17:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1135. [2021-06-12 22:17:31,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 3.236331569664903) internal successors, (3670), 1134 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 3670 transitions. [2021-06-12 22:17:31,707 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 3670 transitions. Word has length 28 [2021-06-12 22:17:31,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:31,707 INFO L482 AbstractCegarLoop]: Abstraction has 1135 states and 3670 transitions. [2021-06-12 22:17:31,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:31,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 3670 transitions. [2021-06-12 22:17:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:31,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:31,709 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:31,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:31,925 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:31,925 INFO L82 PathProgramCache]: Analyzing trace with hash 915430826, now seen corresponding path program 9 times [2021-06-12 22:17:31,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:31,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109647553] [2021-06-12 22:17:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:31,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:31,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109647553] [2021-06-12 22:17:31,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109647553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:31,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157427306] [2021-06-12 22:17:31,973 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 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 22:17:31,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:17:31,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:31,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:31,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:17:32,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157427306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:32,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:32,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:17:32,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508307254] [2021-06-12 22:17:32,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:17:32,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:32,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:17:32,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:17:32,104 INFO L87 Difference]: Start difference. First operand 1135 states and 3670 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:33,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:33,374 INFO L93 Difference]: Finished difference Result 5166 states and 15294 transitions. [2021-06-12 22:17:33,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:17:33,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 22:17:33,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:33,381 INFO L225 Difference]: With dead ends: 5166 [2021-06-12 22:17:33,381 INFO L226 Difference]: Without dead ends: 5166 [2021-06-12 22:17:33,383 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2985 ImplicationChecksByTransitivity, 855.9ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 22:17:33,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2021-06-12 22:17:33,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 1295. [2021-06-12 22:17:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.3377125193199384) internal successors, (4319), 1294 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:33,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4319 transitions. [2021-06-12 22:17:33,422 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4319 transitions. Word has length 30 [2021-06-12 22:17:33,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:33,422 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4319 transitions. [2021-06-12 22:17:33,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:33,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4319 transitions. [2021-06-12 22:17:33,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:33,425 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:33,425 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:33,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 22:17:33,641 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:33,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:33,641 INFO L82 PathProgramCache]: Analyzing trace with hash 930891622, now seen corresponding path program 10 times [2021-06-12 22:17:33,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:33,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52863588] [2021-06-12 22:17:33,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:33,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:33,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52863588] [2021-06-12 22:17:33,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52863588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:33,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082067188] [2021-06-12 22:17:33,691 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 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 22:17:33,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:17:33,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:33,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:33,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:17:33,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082067188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:33,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:33,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:17:33,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416999427] [2021-06-12 22:17:33,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:17:33,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:33,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:17:33,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:17:33,848 INFO L87 Difference]: Start difference. First operand 1295 states and 4319 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:35,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:35,185 INFO L93 Difference]: Finished difference Result 5273 states and 15409 transitions. [2021-06-12 22:17:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-12 22:17:35,185 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 22:17:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:35,192 INFO L225 Difference]: With dead ends: 5273 [2021-06-12 22:17:35,192 INFO L226 Difference]: Without dead ends: 5273 [2021-06-12 22:17:35,192 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3083 ImplicationChecksByTransitivity, 915.6ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 22:17:35,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5273 states. [2021-06-12 22:17:35,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5273 to 1261. [2021-06-12 22:17:35,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 3.3119047619047617) internal successors, (4173), 1260 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:35,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 4173 transitions. [2021-06-12 22:17:35,236 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 4173 transitions. Word has length 30 [2021-06-12 22:17:35,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:35,236 INFO L482 AbstractCegarLoop]: Abstraction has 1261 states and 4173 transitions. [2021-06-12 22:17:35,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:35,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 4173 transitions. [2021-06-12 22:17:35,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:35,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:35,239 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:35,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 22:17:35,454 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:35,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:35,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1624165858, now seen corresponding path program 11 times [2021-06-12 22:17:35,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:35,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42988455] [2021-06-12 22:17:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:35,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:35,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42988455] [2021-06-12 22:17:35,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42988455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:35,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152264390] [2021-06-12 22:17:35,492 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 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 22:17:35,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:17:35,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:35,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:35,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:17:35,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152264390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:35,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:35,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:17:35,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226752040] [2021-06-12 22:17:35,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:17:35,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:35,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:17:35,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:17:35,627 INFO L87 Difference]: Start difference. First operand 1261 states and 4173 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 22:17:36,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:36,412 INFO L93 Difference]: Finished difference Result 3862 states and 11266 transitions. [2021-06-12 22:17:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:17:36,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 30 [2021-06-12 22:17:36,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:36,417 INFO L225 Difference]: With dead ends: 3862 [2021-06-12 22:17:36,417 INFO L226 Difference]: Without dead ends: 3862 [2021-06-12 22:17:36,418 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 499.6ms TimeCoverageRelationStatistics Valid=747, Invalid=2793, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:17:36,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-06-12 22:17:36,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 1267. [2021-06-12 22:17:36,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 3.3143759873617693) internal successors, (4196), 1266 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:36,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 4196 transitions. [2021-06-12 22:17:36,448 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 4196 transitions. Word has length 30 [2021-06-12 22:17:36,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:36,448 INFO L482 AbstractCegarLoop]: Abstraction has 1267 states and 4196 transitions. [2021-06-12 22:17:36,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 22:17:36,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 4196 transitions. [2021-06-12 22:17:36,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:36,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:36,450 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:36,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 22:17:36,653 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:36,653 INFO L82 PathProgramCache]: Analyzing trace with hash 568788464, now seen corresponding path program 12 times [2021-06-12 22:17:36,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:36,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795315263] [2021-06-12 22:17:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:36,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:36,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795315263] [2021-06-12 22:17:36,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795315263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:36,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070243081] [2021-06-12 22:17:36,692 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 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 22:17:36,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:17:36,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:36,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:36,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:17:36,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070243081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:36,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:36,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:17:36,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376861100] [2021-06-12 22:17:36,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:17:36,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:36,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:17:36,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:17:36,847 INFO L87 Difference]: Start difference. First operand 1267 states and 4196 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 22:17:37,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:37,614 INFO L93 Difference]: Finished difference Result 3689 states and 10863 transitions. [2021-06-12 22:17:37,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:17:37,614 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 30 [2021-06-12 22:17:37,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:37,618 INFO L225 Difference]: With dead ends: 3689 [2021-06-12 22:17:37,618 INFO L226 Difference]: Without dead ends: 3673 [2021-06-12 22:17:37,619 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 482.3ms TimeCoverageRelationStatistics Valid=710, Invalid=2482, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:17:37,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3673 states. [2021-06-12 22:17:37,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3673 to 1255. [2021-06-12 22:17:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 3.3038277511961724) internal successors, (4143), 1254 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:37,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 4143 transitions. [2021-06-12 22:17:37,649 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 4143 transitions. Word has length 30 [2021-06-12 22:17:37,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:37,649 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 4143 transitions. [2021-06-12 22:17:37,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 22:17:37,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 4143 transitions. [2021-06-12 22:17:37,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:37,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:37,652 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:37,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:37,858 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:37,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:37,858 INFO L82 PathProgramCache]: Analyzing trace with hash -707538508, now seen corresponding path program 13 times [2021-06-12 22:17:37,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:37,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509638740] [2021-06-12 22:17:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:37,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:37,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509638740] [2021-06-12 22:17:37,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509638740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:37,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364141016] [2021-06-12 22:17:37,898 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 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 22:17:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:37,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:37,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:17:38,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364141016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:38,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:38,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:17:38,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052590226] [2021-06-12 22:17:38,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:17:38,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:38,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:17:38,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:17:38,065 INFO L87 Difference]: Start difference. First operand 1255 states and 4143 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 22:17:38,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:38,890 INFO L93 Difference]: Finished difference Result 4077 states and 11802 transitions. [2021-06-12 22:17:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:17:38,891 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-06-12 22:17:38,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:38,896 INFO L225 Difference]: With dead ends: 4077 [2021-06-12 22:17:38,896 INFO L226 Difference]: Without dead ends: 4053 [2021-06-12 22:17:38,896 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 514.3ms TimeCoverageRelationStatistics Valid=680, Invalid=2400, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 22:17:38,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2021-06-12 22:17:38,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 1269. [2021-06-12 22:17:38,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 3.2981072555205047) internal successors, (4182), 1268 states have internal predecessors, (4182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:38,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 4182 transitions. [2021-06-12 22:17:38,923 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 4182 transitions. Word has length 30 [2021-06-12 22:17:38,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:38,924 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 4182 transitions. [2021-06-12 22:17:38,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 22:17:38,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 4182 transitions. [2021-06-12 22:17:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:38,925 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:38,925 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:39,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 22:17:39,129 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:39,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:39,129 INFO L82 PathProgramCache]: Analyzing trace with hash -437028816, now seen corresponding path program 14 times [2021-06-12 22:17:39,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:39,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791461821] [2021-06-12 22:17:39,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:39,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:39,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791461821] [2021-06-12 22:17:39,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791461821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:39,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152854047] [2021-06-12 22:17:39,166 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 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 22:17:39,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:17:39,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:39,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:39,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:17:39,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152854047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:39,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:39,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:17:39,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941809058] [2021-06-12 22:17:39,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:17:39,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:39,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:17:39,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:17:39,275 INFO L87 Difference]: Start difference. First operand 1269 states and 4182 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 22:17:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:40,055 INFO L93 Difference]: Finished difference Result 4229 states and 12165 transitions. [2021-06-12 22:17:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:17:40,055 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-06-12 22:17:40,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:40,061 INFO L225 Difference]: With dead ends: 4229 [2021-06-12 22:17:40,061 INFO L226 Difference]: Without dead ends: 4229 [2021-06-12 22:17:40,061 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=757, Invalid=2783, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:17:40,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4229 states. [2021-06-12 22:17:40,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4229 to 1092. [2021-06-12 22:17:40,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1092 states, 1091 states have (on average 3.1631530705774518) internal successors, (3451), 1091 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:40,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1092 states to 1092 states and 3451 transitions. [2021-06-12 22:17:40,102 INFO L78 Accepts]: Start accepts. Automaton has 1092 states and 3451 transitions. Word has length 30 [2021-06-12 22:17:40,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:40,102 INFO L482 AbstractCegarLoop]: Abstraction has 1092 states and 3451 transitions. [2021-06-12 22:17:40,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 22:17:40,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1092 states and 3451 transitions. [2021-06-12 22:17:40,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:40,104 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:40,104 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:40,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:40,321 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:40,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:40,321 INFO L82 PathProgramCache]: Analyzing trace with hash 333072554, now seen corresponding path program 15 times [2021-06-12 22:17:40,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:40,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62395584] [2021-06-12 22:17:40,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:40,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:40,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62395584] [2021-06-12 22:17:40,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62395584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:40,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465313165] [2021-06-12 22:17:40,365 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 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 22:17:40,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:17:40,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:40,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:40,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:17:40,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465313165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:40,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:40,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:17:40,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998414291] [2021-06-12 22:17:40,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:17:40,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:40,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:17:40,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:17:40,488 INFO L87 Difference]: Start difference. First operand 1092 states and 3451 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 22:17:41,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:41,361 INFO L93 Difference]: Finished difference Result 3880 states and 11526 transitions. [2021-06-12 22:17:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:17:41,362 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 30 [2021-06-12 22:17:41,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:41,366 INFO L225 Difference]: With dead ends: 3880 [2021-06-12 22:17:41,366 INFO L226 Difference]: Without dead ends: 3880 [2021-06-12 22:17:41,367 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 596.1ms TimeCoverageRelationStatistics Valid=788, Invalid=3244, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:17:41,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2021-06-12 22:17:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 1361. [2021-06-12 22:17:41,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.2536764705882355) internal successors, (4425), 1360 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:41,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4425 transitions. [2021-06-12 22:17:41,405 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4425 transitions. Word has length 30 [2021-06-12 22:17:41,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:41,405 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4425 transitions. [2021-06-12 22:17:41,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 22:17:41,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4425 transitions. [2021-06-12 22:17:41,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:41,407 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:41,407 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:41,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-12 22:17:41,629 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:41,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:41,630 INFO L82 PathProgramCache]: Analyzing trace with hash -722304840, now seen corresponding path program 16 times [2021-06-12 22:17:41,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:41,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659106085] [2021-06-12 22:17:41,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:41,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:41,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659106085] [2021-06-12 22:17:41,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659106085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:41,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910008355] [2021-06-12 22:17:41,668 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 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 22:17:41,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:17:41,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:41,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:41,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:17:41,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910008355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:41,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:41,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:17:41,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398236296] [2021-06-12 22:17:41,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:17:41,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:41,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:17:41,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:17:41,782 INFO L87 Difference]: Start difference. First operand 1361 states and 4425 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 22:17:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:42,532 INFO L93 Difference]: Finished difference Result 3700 states and 11089 transitions. [2021-06-12 22:17:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 22:17:42,532 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 30 [2021-06-12 22:17:42,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:42,536 INFO L225 Difference]: With dead ends: 3700 [2021-06-12 22:17:42,537 INFO L226 Difference]: Without dead ends: 3684 [2021-06-12 22:17:42,537 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 500.7ms TimeCoverageRelationStatistics Valid=675, Invalid=2517, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:17:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3684 states. [2021-06-12 22:17:42,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3684 to 1355. [2021-06-12 22:17:42,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 3.2511078286558344) internal successors, (4402), 1354 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4402 transitions. [2021-06-12 22:17:42,560 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4402 transitions. Word has length 30 [2021-06-12 22:17:42,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:42,560 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 4402 transitions. [2021-06-12 22:17:42,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 22:17:42,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4402 transitions. [2021-06-12 22:17:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:42,562 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:42,563 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:42,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 22:17:42,777 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:42,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:42,777 INFO L82 PathProgramCache]: Analyzing trace with hash 760830098, now seen corresponding path program 17 times [2021-06-12 22:17:42,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:42,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059785970] [2021-06-12 22:17:42,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:42,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:42,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059785970] [2021-06-12 22:17:42,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059785970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:42,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171542011] [2021-06-12 22:17:42,819 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 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 22:17:42,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:17:42,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:42,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:42,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:17:42,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171542011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:42,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:42,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:17:42,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793446981] [2021-06-12 22:17:42,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:17:42,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:42,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:17:42,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:17:42,948 INFO L87 Difference]: Start difference. First operand 1355 states and 4402 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 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 22:17:43,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:43,720 INFO L93 Difference]: Finished difference Result 3586 states and 10726 transitions. [2021-06-12 22:17:43,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:17:43,720 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 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 30 [2021-06-12 22:17:43,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:43,736 INFO L225 Difference]: With dead ends: 3586 [2021-06-12 22:17:43,736 INFO L226 Difference]: Without dead ends: 3538 [2021-06-12 22:17:43,737 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 472.5ms TimeCoverageRelationStatistics Valid=596, Invalid=2160, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 22:17:43,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2021-06-12 22:17:43,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 1367. [2021-06-12 22:17:43,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.2423133235724744) internal successors, (4429), 1366 states have internal predecessors, (4429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:43,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4429 transitions. [2021-06-12 22:17:43,761 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4429 transitions. Word has length 30 [2021-06-12 22:17:43,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:43,761 INFO L482 AbstractCegarLoop]: Abstraction has 1367 states and 4429 transitions. [2021-06-12 22:17:43,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 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 22:17:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4429 transitions. [2021-06-12 22:17:43,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:43,763 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:43,763 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:43,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 22:17:43,964 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:43,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:43,964 INFO L82 PathProgramCache]: Analyzing trace with hash -150600370, now seen corresponding path program 18 times [2021-06-12 22:17:43,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:43,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424287092] [2021-06-12 22:17:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:44,002 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:44,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:44,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424287092] [2021-06-12 22:17:44,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424287092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:44,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52823977] [2021-06-12 22:17:44,003 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 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 22:17:44,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:17:44,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:44,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:44,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:17:44,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52823977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:44,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:44,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:17:44,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715572746] [2021-06-12 22:17:44,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:17:44,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:44,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:17:44,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:17:44,106 INFO L87 Difference]: Start difference. First operand 1367 states and 4429 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 22:17:44,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:44,790 INFO L93 Difference]: Finished difference Result 3947 states and 11608 transitions. [2021-06-12 22:17:44,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:17:44,790 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 30 [2021-06-12 22:17:44,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:44,795 INFO L225 Difference]: With dead ends: 3947 [2021-06-12 22:17:44,795 INFO L226 Difference]: Without dead ends: 3871 [2021-06-12 22:17:44,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 411.2ms TimeCoverageRelationStatistics Valid=584, Invalid=2172, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 22:17:44,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-06-12 22:17:44,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 1381. [2021-06-12 22:17:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.2405797101449276) internal successors, (4472), 1380 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:44,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4472 transitions. [2021-06-12 22:17:44,822 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4472 transitions. Word has length 30 [2021-06-12 22:17:44,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:44,822 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 4472 transitions. [2021-06-12 22:17:44,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 22:17:44,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4472 transitions. [2021-06-12 22:17:44,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:44,825 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:44,825 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:45,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 22:17:45,048 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:45,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:45,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1642605102, now seen corresponding path program 19 times [2021-06-12 22:17:45,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:45,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775985598] [2021-06-12 22:17:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:45,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:45,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775985598] [2021-06-12 22:17:45,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775985598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:45,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816303577] [2021-06-12 22:17:45,098 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 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 22:17:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:45,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:45,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:17:45,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816303577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:45,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:45,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:17:45,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064550638] [2021-06-12 22:17:45,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:17:45,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:45,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:17:45,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:17:45,220 INFO L87 Difference]: Start difference. First operand 1381 states and 4472 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 22:17:45,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:45,924 INFO L93 Difference]: Finished difference Result 3759 states and 11296 transitions. [2021-06-12 22:17:45,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:17:45,925 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 30 [2021-06-12 22:17:45,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:45,929 INFO L225 Difference]: With dead ends: 3759 [2021-06-12 22:17:45,930 INFO L226 Difference]: Without dead ends: 3739 [2021-06-12 22:17:45,930 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 459.4ms TimeCoverageRelationStatistics Valid=649, Invalid=2431, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 22:17:45,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-06-12 22:17:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 1571. [2021-06-12 22:17:45,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 3.186624203821656) internal successors, (5003), 1570 states have internal predecessors, (5003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:45,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 5003 transitions. [2021-06-12 22:17:45,957 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 5003 transitions. Word has length 30 [2021-06-12 22:17:45,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:45,958 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 5003 transitions. [2021-06-12 22:17:45,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 22:17:45,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 5003 transitions. [2021-06-12 22:17:45,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:45,960 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:45,960 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:46,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 22:17:46,165 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:46,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:46,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1372095410, now seen corresponding path program 20 times [2021-06-12 22:17:46,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:46,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480991353] [2021-06-12 22:17:46,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:46,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:46,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480991353] [2021-06-12 22:17:46,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480991353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:46,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961904525] [2021-06-12 22:17:46,204 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 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 22:17:46,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:17:46,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:46,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:46,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:17:46,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961904525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:46,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:46,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:17:46,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714547124] [2021-06-12 22:17:46,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:17:46,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:46,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:17:46,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:17:46,337 INFO L87 Difference]: Start difference. First operand 1571 states and 5003 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 22:17:47,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:47,152 INFO L93 Difference]: Finished difference Result 4002 states and 11899 transitions. [2021-06-12 22:17:47,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:17:47,152 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 30 [2021-06-12 22:17:47,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:47,157 INFO L225 Difference]: With dead ends: 4002 [2021-06-12 22:17:47,157 INFO L226 Difference]: Without dead ends: 4002 [2021-06-12 22:17:47,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1494 ImplicationChecksByTransitivity, 557.1ms TimeCoverageRelationStatistics Valid=869, Invalid=3291, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:17:47,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4002 states. [2021-06-12 22:17:47,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4002 to 1386. [2021-06-12 22:17:47,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 3.2368231046931406) internal successors, (4483), 1385 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4483 transitions. [2021-06-12 22:17:47,185 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4483 transitions. Word has length 30 [2021-06-12 22:17:47,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:47,185 INFO L482 AbstractCegarLoop]: Abstraction has 1386 states and 4483 transitions. [2021-06-12 22:17:47,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 22:17:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4483 transitions. [2021-06-12 22:17:47,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:47,187 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:47,187 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:47,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 22:17:47,388 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:47,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:47,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1532772694, now seen corresponding path program 21 times [2021-06-12 22:17:47,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:47,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733468372] [2021-06-12 22:17:47,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:47,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:47,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733468372] [2021-06-12 22:17:47,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733468372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:47,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504041248] [2021-06-12 22:17:47,443 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 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 22:17:47,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:17:47,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:47,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:47,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:47,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504041248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:47,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:47,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:17:47,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056314748] [2021-06-12 22:17:47,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:17:47,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:47,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:17:47,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:17:47,620 INFO L87 Difference]: Start difference. First operand 1386 states and 4483 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:48,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:48,886 INFO L93 Difference]: Finished difference Result 5413 states and 16415 transitions. [2021-06-12 22:17:48,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 22:17:48,886 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 22:17:48,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:48,893 INFO L225 Difference]: With dead ends: 5413 [2021-06-12 22:17:48,893 INFO L226 Difference]: Without dead ends: 5413 [2021-06-12 22:17:48,894 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2469 ImplicationChecksByTransitivity, 942.8ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 22:17:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-06-12 22:17:48,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 1890. [2021-06-12 22:17:48,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.338803599788248) internal successors, (6307), 1889 states have internal predecessors, (6307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6307 transitions. [2021-06-12 22:17:48,934 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6307 transitions. Word has length 30 [2021-06-12 22:17:48,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:48,934 INFO L482 AbstractCegarLoop]: Abstraction has 1890 states and 6307 transitions. [2021-06-12 22:17:48,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:48,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6307 transitions. [2021-06-12 22:17:48,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:48,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:48,937 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:49,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 22:17:49,137 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:49,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:49,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1706817208, now seen corresponding path program 22 times [2021-06-12 22:17:49,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:49,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213030364] [2021-06-12 22:17:49,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:49,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:49,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213030364] [2021-06-12 22:17:49,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213030364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:49,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21487829] [2021-06-12 22:17:49,187 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 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 22:17:49,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:17:49,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:49,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:49,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:49,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21487829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:49,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:49,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:17:49,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621077293] [2021-06-12 22:17:49,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:17:49,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:49,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:17:49,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:17:49,340 INFO L87 Difference]: Start difference. First operand 1890 states and 6307 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:50,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:50,361 INFO L93 Difference]: Finished difference Result 5130 states and 15678 transitions. [2021-06-12 22:17:50,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:17:50,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 22:17:50,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:50,368 INFO L225 Difference]: With dead ends: 5130 [2021-06-12 22:17:50,369 INFO L226 Difference]: Without dead ends: 5114 [2021-06-12 22:17:50,369 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 710.4ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:17:50,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5114 states. [2021-06-12 22:17:50,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5114 to 1830. [2021-06-12 22:17:50,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1829 states have (on average 3.348824494259158) internal successors, (6125), 1829 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 6125 transitions. [2021-06-12 22:17:50,409 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 6125 transitions. Word has length 30 [2021-06-12 22:17:50,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:50,409 INFO L482 AbstractCegarLoop]: Abstraction has 1830 states and 6125 transitions. [2021-06-12 22:17:50,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:50,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 6125 transitions. [2021-06-12 22:17:50,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:50,412 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:50,412 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:50,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 22:17:50,612 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:50,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:50,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1105015150, now seen corresponding path program 23 times [2021-06-12 22:17:50,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:50,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591914733] [2021-06-12 22:17:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:50,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:50,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591914733] [2021-06-12 22:17:50,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591914733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:50,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099062985] [2021-06-12 22:17:50,655 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 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 22:17:50,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:17:50,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:50,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:50,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:50,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099062985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:50,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:50,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:17:50,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695925574] [2021-06-12 22:17:50,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:17:50,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:50,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:17:50,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:17:50,781 INFO L87 Difference]: Start difference. First operand 1830 states and 6125 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 22:17:51,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:51,625 INFO L93 Difference]: Finished difference Result 4815 states and 14976 transitions. [2021-06-12 22:17:51,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:17:51,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 30 [2021-06-12 22:17:51,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:51,631 INFO L225 Difference]: With dead ends: 4815 [2021-06-12 22:17:51,631 INFO L226 Difference]: Without dead ends: 4767 [2021-06-12 22:17:51,632 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 565.6ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:17:51,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4767 states. [2021-06-12 22:17:51,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4767 to 1882. [2021-06-12 22:17:51,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.334928229665072) internal successors, (6273), 1881 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:51,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 6273 transitions. [2021-06-12 22:17:51,669 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 6273 transitions. Word has length 30 [2021-06-12 22:17:51,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:51,669 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 6273 transitions. [2021-06-12 22:17:51,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 22:17:51,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 6273 transitions. [2021-06-12 22:17:51,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:51,671 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:51,671 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:51,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:51,873 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:51,873 INFO L82 PathProgramCache]: Analyzing trace with hash 441056662, now seen corresponding path program 24 times [2021-06-12 22:17:51,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:51,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534151558] [2021-06-12 22:17:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:51,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:51,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534151558] [2021-06-12 22:17:51,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534151558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:51,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908412693] [2021-06-12 22:17:51,922 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 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 22:17:51,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:17:51,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:51,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:51,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:52,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908412693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:52,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:52,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:17:52,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963401679] [2021-06-12 22:17:52,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:17:52,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:52,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:17:52,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:17:52,053 INFO L87 Difference]: Start difference. First operand 1882 states and 6273 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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 22:17:52,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:52,865 INFO L93 Difference]: Finished difference Result 4941 states and 15164 transitions. [2021-06-12 22:17:52,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:17:52,865 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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 30 [2021-06-12 22:17:52,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:52,872 INFO L225 Difference]: With dead ends: 4941 [2021-06-12 22:17:52,873 INFO L226 Difference]: Without dead ends: 4861 [2021-06-12 22:17:52,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 542.5ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:17:52,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-06-12 22:17:52,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 2178. [2021-06-12 22:17:52,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2177 states have (on average 3.3674781809830043) internal successors, (7331), 2177 states have internal predecessors, (7331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 7331 transitions. [2021-06-12 22:17:52,939 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 7331 transitions. Word has length 30 [2021-06-12 22:17:52,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:52,939 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 7331 transitions. [2021-06-12 22:17:52,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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 22:17:52,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 7331 transitions. [2021-06-12 22:17:52,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:52,944 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:52,944 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:53,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:53,157 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:53,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1158883238, now seen corresponding path program 25 times [2021-06-12 22:17:53,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:53,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280449430] [2021-06-12 22:17:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:53,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:53,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280449430] [2021-06-12 22:17:53,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280449430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:53,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133402065] [2021-06-12 22:17:53,196 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 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 22:17:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:53,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:53,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:53,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133402065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:53,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:53,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:17:53,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677775912] [2021-06-12 22:17:53,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:17:53,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:53,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:17:53,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:17:53,347 INFO L87 Difference]: Start difference. First operand 2178 states and 7331 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:54,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:54,227 INFO L93 Difference]: Finished difference Result 6842 states and 21215 transitions. [2021-06-12 22:17:54,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:17:54,228 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 22:17:54,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:54,237 INFO L225 Difference]: With dead ends: 6842 [2021-06-12 22:17:54,237 INFO L226 Difference]: Without dead ends: 6842 [2021-06-12 22:17:54,238 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 573.6ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:17:54,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6842 states. [2021-06-12 22:17:54,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6842 to 2474. [2021-06-12 22:17:54,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 2473 states have (on average 3.4488475535786494) internal successors, (8529), 2473 states have internal predecessors, (8529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 8529 transitions. [2021-06-12 22:17:54,320 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 8529 transitions. Word has length 30 [2021-06-12 22:17:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:54,320 INFO L482 AbstractCegarLoop]: Abstraction has 2474 states and 8529 transitions. [2021-06-12 22:17:54,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 8529 transitions. [2021-06-12 22:17:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:54,325 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:54,325 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:54,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-12 22:17:54,541 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:54,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:54,541 INFO L82 PathProgramCache]: Analyzing trace with hash 103505844, now seen corresponding path program 26 times [2021-06-12 22:17:54,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:54,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531495838] [2021-06-12 22:17:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:54,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:54,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531495838] [2021-06-12 22:17:54,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531495838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:54,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379687297] [2021-06-12 22:17:54,585 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 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 22:17:54,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:17:54,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:54,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:17:54,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:54,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379687297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:54,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:54,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:17:54,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364954313] [2021-06-12 22:17:54,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:17:54,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:54,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:17:54,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:17:54,751 INFO L87 Difference]: Start difference. First operand 2474 states and 8529 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:55,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:55,580 INFO L93 Difference]: Finished difference Result 6641 states and 20706 transitions. [2021-06-12 22:17:55,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:17:55,581 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 22:17:55,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:55,591 INFO L225 Difference]: With dead ends: 6641 [2021-06-12 22:17:55,591 INFO L226 Difference]: Without dead ends: 6617 [2021-06-12 22:17:55,591 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 539.9ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:17:55,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6617 states. [2021-06-12 22:17:55,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6617 to 2462. [2021-06-12 22:17:55,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 3.4461600975213327) internal successors, (8481), 2461 states have internal predecessors, (8481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 8481 transitions. [2021-06-12 22:17:55,667 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 8481 transitions. Word has length 30 [2021-06-12 22:17:55,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:55,667 INFO L482 AbstractCegarLoop]: Abstraction has 2462 states and 8481 transitions. [2021-06-12 22:17:55,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 8481 transitions. [2021-06-12 22:17:55,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:17:55,671 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:55,671 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:55,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:55,872 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:55,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:55,872 INFO L82 PathProgramCache]: Analyzing trace with hash 954749098, now seen corresponding path program 27 times [2021-06-12 22:17:55,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:55,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935008867] [2021-06-12 22:17:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:55,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:55,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:55,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935008867] [2021-06-12 22:17:55,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935008867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:55,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445271510] [2021-06-12 22:17:55,915 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 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 22:17:55,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:17:55,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:55,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 22:17:55,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:56,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-12 22:17:56,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:56,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:56,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:17:56,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 22:17:56,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:56,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-12 22:17:56,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:56,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:56,164 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 1 xjuncts. [2021-06-12 22:17:56,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:41 [2021-06-12 22:17:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:17:56,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445271510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:56,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:56,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-06-12 22:17:56,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968149314] [2021-06-12 22:17:56,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:17:56,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:56,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:17:56,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:17:56,277 INFO L87 Difference]: Start difference. First operand 2462 states and 8481 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:00,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:00,406 INFO L93 Difference]: Finished difference Result 7094 states and 21992 transitions. [2021-06-12 22:18:00,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-06-12 22:18:00,406 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 22:18:00,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:00,416 INFO L225 Difference]: With dead ends: 7094 [2021-06-12 22:18:00,416 INFO L226 Difference]: Without dead ends: 7094 [2021-06-12 22:18:00,417 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7400 ImplicationChecksByTransitivity, 3369.2ms TimeCoverageRelationStatistics Valid=2804, Invalid=16656, Unknown=0, NotChecked=0, Total=19460 [2021-06-12 22:18:00,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7094 states. [2021-06-12 22:18:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7094 to 2546. [2021-06-12 22:18:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2545 states have (on average 3.4675834970530452) internal successors, (8825), 2545 states have internal predecessors, (8825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:00,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 8825 transitions. [2021-06-12 22:18:00,476 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 8825 transitions. Word has length 30 [2021-06-12 22:18:00,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:00,476 INFO L482 AbstractCegarLoop]: Abstraction has 2546 states and 8825 transitions. [2021-06-12 22:18:00,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:00,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 8825 transitions. [2021-06-12 22:18:00,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:18:00,481 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:00,481 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:00,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:00,692 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:00,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:00,693 INFO L82 PathProgramCache]: Analyzing trace with hash -52824090, now seen corresponding path program 28 times [2021-06-12 22:18:00,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:00,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636135172] [2021-06-12 22:18:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:00,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:00,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:00,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636135172] [2021-06-12 22:18:00,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636135172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:00,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823019292] [2021-06-12 22:18:00,733 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 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 22:18:00,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:18:00,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:00,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:00,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:00,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823019292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:00,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:00,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:18:00,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965492401] [2021-06-12 22:18:00,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:18:00,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:00,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:18:00,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:18:00,891 INFO L87 Difference]: Start difference. First operand 2546 states and 8825 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:01,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:01,891 INFO L93 Difference]: Finished difference Result 7653 states and 24222 transitions. [2021-06-12 22:18:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:18:01,892 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-12 22:18:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:01,903 INFO L225 Difference]: With dead ends: 7653 [2021-06-12 22:18:01,903 INFO L226 Difference]: Without dead ends: 7653 [2021-06-12 22:18:01,903 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 688.5ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:18:01,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7653 states. [2021-06-12 22:18:01,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7653 to 2551. [2021-06-12 22:18:01,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 2550 states have (on average 3.4705882352941178) internal successors, (8850), 2550 states have internal predecessors, (8850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:01,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 8850 transitions. [2021-06-12 22:18:01,967 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 8850 transitions. Word has length 30 [2021-06-12 22:18:01,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:01,967 INFO L482 AbstractCegarLoop]: Abstraction has 2551 states and 8850 transitions. [2021-06-12 22:18:01,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 8850 transitions. [2021-06-12 22:18:01,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:18:01,972 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:01,972 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:02,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-12 22:18:02,172 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:02,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:02,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1172821128, now seen corresponding path program 29 times [2021-06-12 22:18:02,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:02,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184461522] [2021-06-12 22:18:02,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:02,220 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:02,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:02,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184461522] [2021-06-12 22:18:02,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184461522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:02,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214641337] [2021-06-12 22:18:02,221 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 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 22:18:02,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:18:02,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:02,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:02,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:02,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214641337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:02,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:02,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:18:02,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191448199] [2021-06-12 22:18:02,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:18:02,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:02,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:18:02,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:18:02,362 INFO L87 Difference]: Start difference. First operand 2551 states and 8850 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 22:18:03,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:03,273 INFO L93 Difference]: Finished difference Result 6999 states and 21972 transitions. [2021-06-12 22:18:03,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:18:03,273 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 30 [2021-06-12 22:18:03,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:03,283 INFO L225 Difference]: With dead ends: 6999 [2021-06-12 22:18:03,283 INFO L226 Difference]: Without dead ends: 6979 [2021-06-12 22:18:03,283 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 550.7ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:18:03,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6979 states. [2021-06-12 22:18:03,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6979 to 2561. [2021-06-12 22:18:03,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 3.469140625) internal successors, (8881), 2560 states have internal predecessors, (8881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:03,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 8881 transitions. [2021-06-12 22:18:03,341 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 8881 transitions. Word has length 30 [2021-06-12 22:18:03,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:03,341 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 8881 transitions. [2021-06-12 22:18:03,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 22:18:03,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 8881 transitions. [2021-06-12 22:18:03,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:18:03,344 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:03,344 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:03,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 22:18:03,545 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:03,545 INFO L82 PathProgramCache]: Analyzing trace with hash -902311436, now seen corresponding path program 30 times [2021-06-12 22:18:03,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:03,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77047508] [2021-06-12 22:18:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:03,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:03,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77047508] [2021-06-12 22:18:03,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77047508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:03,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806130289] [2021-06-12 22:18:03,580 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 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 22:18:03,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:18:03,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:03,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:03,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:03,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:03,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806130289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:03,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:03,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:18:03,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862047452] [2021-06-12 22:18:03,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:18:03,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:03,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:18:03,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:18:03,711 INFO L87 Difference]: Start difference. First operand 2561 states and 8881 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 22:18:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:04,602 INFO L93 Difference]: Finished difference Result 7314 states and 22731 transitions. [2021-06-12 22:18:04,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:18:04,603 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 30 [2021-06-12 22:18:04,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:04,613 INFO L225 Difference]: With dead ends: 7314 [2021-06-12 22:18:04,613 INFO L226 Difference]: Without dead ends: 7314 [2021-06-12 22:18:04,614 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 593.8ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:18:04,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7314 states. [2021-06-12 22:18:04,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7314 to 2550. [2021-06-12 22:18:04,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.4699882306786973) internal successors, (8845), 2549 states have internal predecessors, (8845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:04,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8845 transitions. [2021-06-12 22:18:04,679 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8845 transitions. Word has length 30 [2021-06-12 22:18:04,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:04,680 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8845 transitions. [2021-06-12 22:18:04,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 22:18:04,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8845 transitions. [2021-06-12 22:18:04,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:18:04,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:04,685 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:04,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 22:18:04,907 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:04,908 INFO L82 PathProgramCache]: Analyzing trace with hash -317283250, now seen corresponding path program 31 times [2021-06-12 22:18:04,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:04,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168872166] [2021-06-12 22:18:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:04,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:04,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168872166] [2021-06-12 22:18:04,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168872166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:04,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514469459] [2021-06-12 22:18:04,947 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 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 22:18:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:05,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:05,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:05,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:05,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514469459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:05,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:05,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:18:05,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799103198] [2021-06-12 22:18:05,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:18:05,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:05,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:18:05,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:18:05,100 INFO L87 Difference]: Start difference. First operand 2550 states and 8845 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 22:18:05,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:05,715 INFO L93 Difference]: Finished difference Result 5631 states and 17797 transitions. [2021-06-12 22:18:05,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:18:05,715 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-06-12 22:18:05,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:05,723 INFO L225 Difference]: With dead ends: 5631 [2021-06-12 22:18:05,723 INFO L226 Difference]: Without dead ends: 5583 [2021-06-12 22:18:05,724 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 371.9ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:18:05,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5583 states. [2021-06-12 22:18:05,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5583 to 2564. [2021-06-12 22:18:05,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 3.467811158798283) internal successors, (8888), 2563 states have internal predecessors, (8888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:05,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 8888 transitions. [2021-06-12 22:18:05,791 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 8888 transitions. Word has length 30 [2021-06-12 22:18:05,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:05,791 INFO L482 AbstractCegarLoop]: Abstraction has 2564 states and 8888 transitions. [2021-06-12 22:18:05,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 22:18:05,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 8888 transitions. [2021-06-12 22:18:05,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:18:05,795 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:05,796 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:05,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:05,996 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:05,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:05,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1809287982, now seen corresponding path program 32 times [2021-06-12 22:18:05,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:05,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515138687] [2021-06-12 22:18:05,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:06,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:06,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515138687] [2021-06-12 22:18:06,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515138687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:06,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003260825] [2021-06-12 22:18:06,041 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 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 22:18:06,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:18:06,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:06,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:06,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:06,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003260825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:06,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:06,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:18:06,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869732840] [2021-06-12 22:18:06,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:18:06,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:06,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:18:06,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:18:06,176 INFO L87 Difference]: Start difference. First operand 2564 states and 8888 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 22:18:07,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:07,090 INFO L93 Difference]: Finished difference Result 6400 states and 19785 transitions. [2021-06-12 22:18:07,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:18:07,090 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-06-12 22:18:07,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:07,100 INFO L225 Difference]: With dead ends: 6400 [2021-06-12 22:18:07,100 INFO L226 Difference]: Without dead ends: 6384 [2021-06-12 22:18:07,100 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 558.5ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:18:07,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6384 states. [2021-06-12 22:18:07,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6384 to 2642. [2021-06-12 22:18:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2642 states, 2641 states have (on average 3.452101476713366) internal successors, (9117), 2641 states have internal predecessors, (9117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:07,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 9117 transitions. [2021-06-12 22:18:07,190 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 9117 transitions. Word has length 30 [2021-06-12 22:18:07,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:07,190 INFO L482 AbstractCegarLoop]: Abstraction has 2642 states and 9117 transitions. [2021-06-12 22:18:07,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 22:18:07,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 9117 transitions. [2021-06-12 22:18:07,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:18:07,194 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:07,194 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:07,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 22:18:07,395 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:07,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:07,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1538778290, now seen corresponding path program 33 times [2021-06-12 22:18:07,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:07,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671906886] [2021-06-12 22:18:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:07,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:07,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671906886] [2021-06-12 22:18:07,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671906886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:07,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474100236] [2021-06-12 22:18:07,432 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 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 22:18:07,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:18:07,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:07,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:07,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:07,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474100236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:07,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:07,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:18:07,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576110785] [2021-06-12 22:18:07,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:18:07,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:07,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:18:07,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:18:07,543 INFO L87 Difference]: Start difference. First operand 2642 states and 9117 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 22:18:08,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:08,451 INFO L93 Difference]: Finished difference Result 6651 states and 20412 transitions. [2021-06-12 22:18:08,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:18:08,451 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 30 [2021-06-12 22:18:08,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:08,461 INFO L225 Difference]: With dead ends: 6651 [2021-06-12 22:18:08,461 INFO L226 Difference]: Without dead ends: 6651 [2021-06-12 22:18:08,462 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 593.5ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 22:18:08,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-06-12 22:18:08,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 2550. [2021-06-12 22:18:08,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.4699882306786973) internal successors, (8845), 2549 states have internal predecessors, (8845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:08,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8845 transitions. [2021-06-12 22:18:08,521 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8845 transitions. Word has length 30 [2021-06-12 22:18:08,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:08,521 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8845 transitions. [2021-06-12 22:18:08,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 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 22:18:08,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8845 transitions. [2021-06-12 22:18:08,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:18:08,525 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:08,526 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:08,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:08,727 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:08,727 INFO L82 PathProgramCache]: Analyzing trace with hash 729705298, now seen corresponding path program 34 times [2021-06-12 22:18:08,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:08,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117002022] [2021-06-12 22:18:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:08,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:08,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117002022] [2021-06-12 22:18:08,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117002022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:08,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796436285] [2021-06-12 22:18:08,776 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 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 22:18:08,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:18:08,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:08,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:08,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:08,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796436285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:08,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:08,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:18:08,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298359293] [2021-06-12 22:18:08,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:18:08,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:08,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:18:08,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:18:08,937 INFO L87 Difference]: Start difference. First operand 2550 states and 8845 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 22:18:09,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:09,827 INFO L93 Difference]: Finished difference Result 6000 states and 18681 transitions. [2021-06-12 22:18:09,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:18:09,827 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 30 [2021-06-12 22:18:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:09,835 INFO L225 Difference]: With dead ends: 6000 [2021-06-12 22:18:09,835 INFO L226 Difference]: Without dead ends: 5912 [2021-06-12 22:18:09,836 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 582.3ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:18:09,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5912 states. [2021-06-12 22:18:09,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5912 to 2568. [2021-06-12 22:18:09,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 3.4678613167121153) internal successors, (8902), 2567 states have internal predecessors, (8902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:09,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 8902 transitions. [2021-06-12 22:18:09,889 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 8902 transitions. Word has length 30 [2021-06-12 22:18:09,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:09,889 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 8902 transitions. [2021-06-12 22:18:09,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 22:18:09,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 8902 transitions. [2021-06-12 22:18:09,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:18:09,892 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:09,892 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:10,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:10,093 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:10,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:10,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1432234710, now seen corresponding path program 35 times [2021-06-12 22:18:10,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:10,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050291552] [2021-06-12 22:18:10,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:10,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:10,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050291552] [2021-06-12 22:18:10,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050291552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:10,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035511597] [2021-06-12 22:18:10,140 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 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 22:18:10,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:18:10,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:10,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:10,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:10,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035511597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:10,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:10,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:18:10,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039538239] [2021-06-12 22:18:10,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:18:10,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:10,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:18:10,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:18:10,237 INFO L87 Difference]: Start difference. First operand 2568 states and 8902 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 22:18:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:11,123 INFO L93 Difference]: Finished difference Result 6028 states and 18895 transitions. [2021-06-12 22:18:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:18:11,124 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 30 [2021-06-12 22:18:11,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:11,131 INFO L225 Difference]: With dead ends: 6028 [2021-06-12 22:18:11,131 INFO L226 Difference]: Without dead ends: 5980 [2021-06-12 22:18:11,131 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 584.6ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:18:11,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5980 states. [2021-06-12 22:18:11,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5980 to 2814. [2021-06-12 22:18:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2814 states, 2813 states have (on average 3.407394241023818) internal successors, (9585), 2813 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 9585 transitions. [2021-06-12 22:18:11,181 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 9585 transitions. Word has length 30 [2021-06-12 22:18:11,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:11,181 INFO L482 AbstractCegarLoop]: Abstraction has 2814 states and 9585 transitions. [2021-06-12 22:18:11,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 22:18:11,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 9585 transitions. [2021-06-12 22:18:11,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:18:11,184 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:11,184 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:11,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-12 22:18:11,385 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:11,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:11,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2092961066, now seen corresponding path program 36 times [2021-06-12 22:18:11,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:11,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371632459] [2021-06-12 22:18:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:11,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:11,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371632459] [2021-06-12 22:18:11,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371632459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:11,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061963351] [2021-06-12 22:18:11,429 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 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 22:18:11,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:18:11,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:11,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:11,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:11,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061963351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:11,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:11,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:18:11,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988595486] [2021-06-12 22:18:11,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:18:11,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:11,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:18:11,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:18:11,532 INFO L87 Difference]: Start difference. First operand 2814 states and 9585 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 22:18:12,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:12,553 INFO L93 Difference]: Finished difference Result 6722 states and 20709 transitions. [2021-06-12 22:18:12,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:18:12,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 30 [2021-06-12 22:18:12,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:12,563 INFO L225 Difference]: With dead ends: 6722 [2021-06-12 22:18:12,563 INFO L226 Difference]: Without dead ends: 6710 [2021-06-12 22:18:12,563 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 661.5ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 22:18:12,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6710 states. [2021-06-12 22:18:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6710 to 3090. [2021-06-12 22:18:12,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 3089 states have (on average 3.354807381029459) internal successors, (10363), 3089 states have internal predecessors, (10363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 10363 transitions. [2021-06-12 22:18:12,631 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 10363 transitions. Word has length 30 [2021-06-12 22:18:12,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:12,631 INFO L482 AbstractCegarLoop]: Abstraction has 3090 states and 10363 transitions. [2021-06-12 22:18:12,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 22:18:12,631 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 10363 transitions. [2021-06-12 22:18:12,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 22:18:12,636 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:12,636 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:12,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:12,836 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:12,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:12,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1822451374, now seen corresponding path program 37 times [2021-06-12 22:18:12,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:12,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111534882] [2021-06-12 22:18:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:12,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:12,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:12,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:12,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111534882] [2021-06-12 22:18:12,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111534882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:12,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368918144] [2021-06-12 22:18:12,885 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 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 22:18:12,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:12,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:12,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:13,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368918144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:13,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:13,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:18:13,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249979510] [2021-06-12 22:18:13,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:18:13,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:13,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:18:13,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:18:13,007 INFO L87 Difference]: Start difference. First operand 3090 states and 10363 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 22:18:14,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:14,282 INFO L93 Difference]: Finished difference Result 7117 states and 21720 transitions. [2021-06-12 22:18:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-12 22:18:14,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 30 [2021-06-12 22:18:14,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:14,291 INFO L225 Difference]: With dead ends: 7117 [2021-06-12 22:18:14,291 INFO L226 Difference]: Without dead ends: 7117 [2021-06-12 22:18:14,292 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 886.3ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-12 22:18:14,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7117 states. [2021-06-12 22:18:14,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7117 to 2928. [2021-06-12 22:18:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 3.3850358729074137) internal successors, (9908), 2927 states have internal predecessors, (9908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 9908 transitions. [2021-06-12 22:18:14,355 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 9908 transitions. Word has length 30 [2021-06-12 22:18:14,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:14,355 INFO L482 AbstractCegarLoop]: Abstraction has 2928 states and 9908 transitions. [2021-06-12 22:18:14,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 22:18:14,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 9908 transitions. [2021-06-12 22:18:14,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:18:14,358 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:14,358 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:14,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-12 22:18:14,559 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:14,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:14,559 INFO L82 PathProgramCache]: Analyzing trace with hash -605801532, now seen corresponding path program 38 times [2021-06-12 22:18:14,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:14,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230863662] [2021-06-12 22:18:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:14,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:14,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230863662] [2021-06-12 22:18:14,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230863662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:14,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183634778] [2021-06-12 22:18:14,620 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 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 22:18:14,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:18:14,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:14,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:18:14,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:14,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:14,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183634778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:14,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:14,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:18:14,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709616149] [2021-06-12 22:18:14,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:18:14,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:14,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:18:14,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:18:14,775 INFO L87 Difference]: Start difference. First operand 2928 states and 9908 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:15,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:15,762 INFO L93 Difference]: Finished difference Result 11499 states and 37094 transitions. [2021-06-12 22:18:15,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 22:18:15,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:18:15,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:15,779 INFO L225 Difference]: With dead ends: 11499 [2021-06-12 22:18:15,779 INFO L226 Difference]: Without dead ends: 11499 [2021-06-12 22:18:15,780 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 605.0ms TimeCoverageRelationStatistics Valid=922, Invalid=2984, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:18:15,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11499 states. [2021-06-12 22:18:15,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11499 to 3853. [2021-06-12 22:18:15,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3853 states, 3852 states have (on average 3.5983904465212877) internal successors, (13861), 3852 states have internal predecessors, (13861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3853 states to 3853 states and 13861 transitions. [2021-06-12 22:18:15,885 INFO L78 Accepts]: Start accepts. Automaton has 3853 states and 13861 transitions. Word has length 32 [2021-06-12 22:18:15,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:15,885 INFO L482 AbstractCegarLoop]: Abstraction has 3853 states and 13861 transitions. [2021-06-12 22:18:15,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:15,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3853 states and 13861 transitions. [2021-06-12 22:18:15,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:18:15,892 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:15,892 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:16,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 22:18:16,096 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:16,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:16,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1297197704, now seen corresponding path program 17 times [2021-06-12 22:18:16,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:16,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883724550] [2021-06-12 22:18:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:16,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:16,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883724550] [2021-06-12 22:18:16,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883724550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:16,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312360457] [2021-06-12 22:18:16,155 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 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 22:18:16,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:18:16,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:16,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:18:16,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:16,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312360457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:16,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:16,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:18:16,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426116690] [2021-06-12 22:18:16,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:18:16,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:16,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:18:16,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:18:16,348 INFO L87 Difference]: Start difference. First operand 3853 states and 13861 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:17,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:17,436 INFO L93 Difference]: Finished difference Result 11274 states and 36638 transitions. [2021-06-12 22:18:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 22:18:17,437 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:18:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:17,454 INFO L225 Difference]: With dead ends: 11274 [2021-06-12 22:18:17,454 INFO L226 Difference]: Without dead ends: 11274 [2021-06-12 22:18:17,454 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 679.9ms TimeCoverageRelationStatistics Valid=918, Invalid=3114, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:18:17,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11274 states. [2021-06-12 22:18:17,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11274 to 3659. [2021-06-12 22:18:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 3.548933843630399) internal successors, (12982), 3658 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:17,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 12982 transitions. [2021-06-12 22:18:17,566 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 12982 transitions. Word has length 32 [2021-06-12 22:18:17,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:17,566 INFO L482 AbstractCegarLoop]: Abstraction has 3659 states and 12982 transitions. [2021-06-12 22:18:17,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 12982 transitions. [2021-06-12 22:18:17,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:18:17,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:17,572 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:17,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:17,772 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:17,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:17,772 INFO L82 PathProgramCache]: Analyzing trace with hash 600098510, now seen corresponding path program 39 times [2021-06-12 22:18:17,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:17,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802998877] [2021-06-12 22:18:17,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:17,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:17,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802998877] [2021-06-12 22:18:17,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802998877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:17,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422865727] [2021-06-12 22:18:17,816 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 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 22:18:17,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:18:17,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:17,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:18:17,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:17,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422865727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:17,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:17,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:18:17,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679313565] [2021-06-12 22:18:17,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:18:17,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:17,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:18:17,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:18:17,965 INFO L87 Difference]: Start difference. First operand 3659 states and 12982 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:18,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:18,602 INFO L93 Difference]: Finished difference Result 9494 states and 30497 transitions. [2021-06-12 22:18:18,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:18:18,602 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:18:18,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:18,617 INFO L225 Difference]: With dead ends: 9494 [2021-06-12 22:18:18,617 INFO L226 Difference]: Without dead ends: 9486 [2021-06-12 22:18:18,617 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 323.4ms TimeCoverageRelationStatistics Valid=396, Invalid=1244, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:18:18,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9486 states. [2021-06-12 22:18:18,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9486 to 3671. [2021-06-12 22:18:18,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3670 states have (on average 3.5498637602179834) internal successors, (13028), 3670 states have internal predecessors, (13028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:18,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 13028 transitions. [2021-06-12 22:18:18,714 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 13028 transitions. Word has length 32 [2021-06-12 22:18:18,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:18,714 INFO L482 AbstractCegarLoop]: Abstraction has 3671 states and 13028 transitions. [2021-06-12 22:18:18,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:18,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 13028 transitions. [2021-06-12 22:18:18,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:18:18,719 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:18,720 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:18,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 22:18:18,921 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:18,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:18,921 INFO L82 PathProgramCache]: Analyzing trace with hash 870608202, now seen corresponding path program 40 times [2021-06-12 22:18:18,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:18,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661878229] [2021-06-12 22:18:18,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:18,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:18,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661878229] [2021-06-12 22:18:18,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661878229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:18,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579700763] [2021-06-12 22:18:18,967 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 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 22:18:19,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:18:19,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:19,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:18:19,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:19,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579700763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:19,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:19,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:18:19,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756665910] [2021-06-12 22:18:19,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:18:19,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:19,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:18:19,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:18:19,125 INFO L87 Difference]: Start difference. First operand 3671 states and 13028 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:19,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:19,843 INFO L93 Difference]: Finished difference Result 10005 states and 31855 transitions. [2021-06-12 22:18:19,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:18:19,844 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:18:19,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:19,887 INFO L225 Difference]: With dead ends: 10005 [2021-06-12 22:18:19,887 INFO L226 Difference]: Without dead ends: 10005 [2021-06-12 22:18:19,887 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 401.2ms TimeCoverageRelationStatistics Valid=480, Invalid=1412, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:18:19,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10005 states. [2021-06-12 22:18:19,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10005 to 3659. [2021-06-12 22:18:19,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3659 states, 3658 states have (on average 3.548933843630399) internal successors, (12982), 3658 states have internal predecessors, (12982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3659 states to 3659 states and 12982 transitions. [2021-06-12 22:18:19,978 INFO L78 Accepts]: Start accepts. Automaton has 3659 states and 12982 transitions. Word has length 32 [2021-06-12 22:18:19,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:19,978 INFO L482 AbstractCegarLoop]: Abstraction has 3659 states and 12982 transitions. [2021-06-12 22:18:19,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3659 states and 12982 transitions. [2021-06-12 22:18:19,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:18:19,983 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:19,983 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:20,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:20,184 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:20,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:20,184 INFO L82 PathProgramCache]: Analyzing trace with hash 2007937660, now seen corresponding path program 18 times [2021-06-12 22:18:20,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:20,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675807285] [2021-06-12 22:18:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:20,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:20,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675807285] [2021-06-12 22:18:20,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675807285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:20,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097322757] [2021-06-12 22:18:20,226 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 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 22:18:20,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:18:20,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:20,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:20,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:18:20,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097322757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:20,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:20,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-12 22:18:20,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109672558] [2021-06-12 22:18:20,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:18:20,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:20,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:18:20,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:18:20,381 INFO L87 Difference]: Start difference. First operand 3659 states and 12982 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:22,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:22,098 INFO L93 Difference]: Finished difference Result 10824 states and 34873 transitions. [2021-06-12 22:18:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-12 22:18:22,098 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:18:22,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:22,115 INFO L225 Difference]: With dead ends: 10824 [2021-06-12 22:18:22,115 INFO L226 Difference]: Without dead ends: 10824 [2021-06-12 22:18:22,115 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 1069.3ms TimeCoverageRelationStatistics Valid=1649, Invalid=7281, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 22:18:22,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10824 states. [2021-06-12 22:18:22,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10824 to 4026. [2021-06-12 22:18:22,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 4025 states have (on average 3.570683229813665) internal successors, (14372), 4025 states have internal predecessors, (14372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 14372 transitions. [2021-06-12 22:18:22,223 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 14372 transitions. Word has length 32 [2021-06-12 22:18:22,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:22,223 INFO L482 AbstractCegarLoop]: Abstraction has 4026 states and 14372 transitions. [2021-06-12 22:18:22,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 14372 transitions. [2021-06-12 22:18:22,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:18:22,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:22,230 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:22,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 22:18:22,440 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:22,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:22,440 INFO L82 PathProgramCache]: Analyzing trace with hash -383319252, now seen corresponding path program 41 times [2021-06-12 22:18:22,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:22,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163823188] [2021-06-12 22:18:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:22,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:22,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163823188] [2021-06-12 22:18:22,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163823188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:22,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158308462] [2021-06-12 22:18:22,488 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 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 22:18:22,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:18:22,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:22,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:22,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:18:22,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158308462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:22,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:22,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 22:18:22,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109442987] [2021-06-12 22:18:22,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:18:22,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:22,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:18:22,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:18:22,632 INFO L87 Difference]: Start difference. First operand 4026 states and 14372 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:24,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:24,648 INFO L93 Difference]: Finished difference Result 11450 states and 37158 transitions. [2021-06-12 22:18:24,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-12 22:18:24,648 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:18:24,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:24,667 INFO L225 Difference]: With dead ends: 11450 [2021-06-12 22:18:24,667 INFO L226 Difference]: Without dead ends: 11402 [2021-06-12 22:18:24,668 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4651 ImplicationChecksByTransitivity, 1365.6ms TimeCoverageRelationStatistics Valid=2133, Invalid=10299, Unknown=0, NotChecked=0, Total=12432 [2021-06-12 22:18:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11402 states. [2021-06-12 22:18:24,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11402 to 4295. [2021-06-12 22:18:24,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4295 states, 4294 states have (on average 3.6313460642757334) internal successors, (15593), 4294 states have internal predecessors, (15593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4295 states to 4295 states and 15593 transitions. [2021-06-12 22:18:24,812 INFO L78 Accepts]: Start accepts. Automaton has 4295 states and 15593 transitions. Word has length 32 [2021-06-12 22:18:24,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:24,812 INFO L482 AbstractCegarLoop]: Abstraction has 4295 states and 15593 transitions. [2021-06-12 22:18:24,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:24,812 INFO L276 IsEmpty]: Start isEmpty. Operand 4295 states and 15593 transitions. [2021-06-12 22:18:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:18:24,818 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:24,818 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:25,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:25,019 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:25,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:25,019 INFO L82 PathProgramCache]: Analyzing trace with hash 717122884, now seen corresponding path program 19 times [2021-06-12 22:18:25,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:25,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714999164] [2021-06-12 22:18:25,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:25,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:18:25,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:25,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714999164] [2021-06-12 22:18:25,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714999164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:25,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305823507] [2021-06-12 22:18:25,064 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 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 22:18:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:25,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:18:25,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:25,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305823507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:25,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:25,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 22:18:25,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844929361] [2021-06-12 22:18:25,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:18:25,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:25,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:18:25,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:18:25,232 INFO L87 Difference]: Start difference. First operand 4295 states and 15593 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:26,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:26,094 INFO L93 Difference]: Finished difference Result 11886 states and 38735 transitions. [2021-06-12 22:18:26,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:18:26,094 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:18:26,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:26,120 INFO L225 Difference]: With dead ends: 11886 [2021-06-12 22:18:26,120 INFO L226 Difference]: Without dead ends: 11886 [2021-06-12 22:18:26,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 538.5ms TimeCoverageRelationStatistics Valid=740, Invalid=2016, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 22:18:26,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11886 states. [2021-06-12 22:18:26,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11886 to 4493. [2021-06-12 22:18:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4493 states, 4492 states have (on average 3.610418521816563) internal successors, (16218), 4492 states have internal predecessors, (16218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:26,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4493 states to 4493 states and 16218 transitions. [2021-06-12 22:18:26,347 INFO L78 Accepts]: Start accepts. Automaton has 4493 states and 16218 transitions. Word has length 32 [2021-06-12 22:18:26,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:26,348 INFO L482 AbstractCegarLoop]: Abstraction has 4493 states and 16218 transitions. [2021-06-12 22:18:26,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:26,348 INFO L276 IsEmpty]: Start isEmpty. Operand 4493 states and 16218 transitions. [2021-06-12 22:18:26,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:18:26,355 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:26,355 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:26,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-12 22:18:26,555 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:26,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:26,556 INFO L82 PathProgramCache]: Analyzing trace with hash -338254510, now seen corresponding path program 20 times [2021-06-12 22:18:26,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:26,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833753782] [2021-06-12 22:18:26,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:18:26,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:26,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833753782] [2021-06-12 22:18:26,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833753782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:26,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795412678] [2021-06-12 22:18:26,602 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 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 22:18:26,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:18:26,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:26,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:26,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:18:26,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795412678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:26,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:26,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 22:18:26,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013782531] [2021-06-12 22:18:26,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:18:26,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:26,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:18:26,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:18:26,754 INFO L87 Difference]: Start difference. First operand 4493 states and 16218 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:28,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:28,365 INFO L93 Difference]: Finished difference Result 12030 states and 39107 transitions. [2021-06-12 22:18:28,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-12 22:18:28,366 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:18:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:28,384 INFO L225 Difference]: With dead ends: 12030 [2021-06-12 22:18:28,384 INFO L226 Difference]: Without dead ends: 12026 [2021-06-12 22:18:28,384 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3145 ImplicationChecksByTransitivity, 976.0ms TimeCoverageRelationStatistics Valid=1618, Invalid=7124, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 22:18:28,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12026 states. [2021-06-12 22:18:28,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12026 to 4522. [2021-06-12 22:18:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4522 states, 4521 states have (on average 3.6051758460517584) internal successors, (16299), 4521 states have internal predecessors, (16299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:28,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 16299 transitions. [2021-06-12 22:18:28,508 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 16299 transitions. Word has length 32 [2021-06-12 22:18:28,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:28,508 INFO L482 AbstractCegarLoop]: Abstraction has 4522 states and 16299 transitions. [2021-06-12 22:18:28,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:28,508 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 16299 transitions. [2021-06-12 22:18:28,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:18:28,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:28,516 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:28,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:28,728 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:28,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:28,728 INFO L82 PathProgramCache]: Analyzing trace with hash 956690446, now seen corresponding path program 21 times [2021-06-12 22:18:28,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:28,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801180186] [2021-06-12 22:18:28,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:28,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:28,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801180186] [2021-06-12 22:18:28,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801180186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:28,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550393665] [2021-06-12 22:18:28,774 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 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 22:18:28,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 22:18:28,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:28,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:18:28,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:28,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:28,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550393665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:28,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:28,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 22:18:28,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519556812] [2021-06-12 22:18:28,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:18:28,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:28,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:18:28,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:18:28,918 INFO L87 Difference]: Start difference. First operand 4522 states and 16299 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:30,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:30,125 INFO L93 Difference]: Finished difference Result 11020 states and 36349 transitions. [2021-06-12 22:18:30,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 22:18:30,125 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:18:30,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:30,144 INFO L225 Difference]: With dead ends: 11020 [2021-06-12 22:18:30,145 INFO L226 Difference]: Without dead ends: 10988 [2021-06-12 22:18:30,145 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 731.2ms TimeCoverageRelationStatistics Valid=1165, Invalid=4237, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 22:18:30,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10988 states. [2021-06-12 22:18:30,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10988 to 4521. [2021-06-12 22:18:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4521 states, 4520 states have (on average 3.604424778761062) internal successors, (16292), 4520 states have internal predecessors, (16292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4521 states to 4521 states and 16292 transitions. [2021-06-12 22:18:30,263 INFO L78 Accepts]: Start accepts. Automaton has 4521 states and 16292 transitions. Word has length 32 [2021-06-12 22:18:30,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:30,264 INFO L482 AbstractCegarLoop]: Abstraction has 4521 states and 16292 transitions. [2021-06-12 22:18:30,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:30,264 INFO L276 IsEmpty]: Start isEmpty. Operand 4521 states and 16292 transitions. [2021-06-12 22:18:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:18:30,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:30,270 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:30,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-12 22:18:30,471 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:30,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:30,471 INFO L82 PathProgramCache]: Analyzing trace with hash 313112068, now seen corresponding path program 42 times [2021-06-12 22:18:30,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:30,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220443667] [2021-06-12 22:18:30,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:30,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:30,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220443667] [2021-06-12 22:18:30,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220443667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:30,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912921061] [2021-06-12 22:18:30,912 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 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 22:18:30,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:18:30,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:30,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 22:18:30,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:31,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:18:31,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:31,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:31,059 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 1 xjuncts. [2021-06-12 22:18:31,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-06-12 22:18:31,106 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-12 22:18:31,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:18:31,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:31,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:31,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:18:31,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-06-12 22:18:31,194 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-12 22:18:31,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-12 22:18:31,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:31,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:31,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:18:31,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:54 [2021-06-12 22:18:31,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:31,372 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-12 22:18:31,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-12 22:18:31,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:31,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:31,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:18:31,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:57 [2021-06-12 22:18:31,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:31,635 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-12 22:18:31,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-12 22:18:31,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:31,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:31,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 22:18:31,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:64, output treesize:63 [2021-06-12 22:18:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:18:31,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912921061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:31,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:31,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-12 22:18:31,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968254301] [2021-06-12 22:18:31,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 22:18:31,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:31,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 22:18:31,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:18:31,816 INFO L87 Difference]: Start difference. First operand 4521 states and 16292 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:32,390 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-12 22:18:33,641 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-06-12 22:18:34,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:34,655 INFO L93 Difference]: Finished difference Result 6435 states and 22058 transitions. [2021-06-12 22:18:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:18:34,656 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:18:34,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:34,667 INFO L225 Difference]: With dead ends: 6435 [2021-06-12 22:18:34,667 INFO L226 Difference]: Without dead ends: 6256 [2021-06-12 22:18:34,667 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 2520.0ms TimeCoverageRelationStatistics Valid=509, Invalid=3397, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:18:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2021-06-12 22:18:34,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 4629. [2021-06-12 22:18:34,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4628 states have (on average 3.6028522039757993) internal successors, (16674), 4628 states have internal predecessors, (16674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:34,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 16674 transitions. [2021-06-12 22:18:34,741 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 16674 transitions. Word has length 32 [2021-06-12 22:18:34,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:34,741 INFO L482 AbstractCegarLoop]: Abstraction has 4629 states and 16674 transitions. [2021-06-12 22:18:34,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 16674 transitions. [2021-06-12 22:18:34,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:18:34,749 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:34,749 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:34,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:34,972 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:34,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:34,972 INFO L82 PathProgramCache]: Analyzing trace with hash 2029292164, now seen corresponding path program 43 times [2021-06-12 22:18:34,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:34,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635286429] [2021-06-12 22:18:34,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:35,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:35,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635286429] [2021-06-12 22:18:35,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635286429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:35,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221205176] [2021-06-12 22:18:35,444 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 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 22:18:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:35,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 22:18:35,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:35,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:18:35,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:35,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:35,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:18:35,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-12 22:18:35,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:18:35,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:35,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:35,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:18:35,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:35 [2021-06-12 22:18:35,664 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-12 22:18:35,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-12 22:18:35,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:35,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:35,679 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 1 xjuncts. [2021-06-12 22:18:35,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-12 22:18:35,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:35,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:35,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:18:35,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-06-12 22:18:35,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:35,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:35,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:18:35,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:42 [2021-06-12 22:18:35,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:35,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:35,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-06-12 22:18:35,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:35,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:35,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:18:35,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:39 [2021-06-12 22:18:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:36,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221205176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:36,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:36,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-06-12 22:18:36,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215262440] [2021-06-12 22:18:36,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 22:18:36,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:36,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 22:18:36,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:18:36,017 INFO L87 Difference]: Start difference. First operand 4629 states and 16674 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:37,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:37,692 INFO L93 Difference]: Finished difference Result 6469 states and 22175 transitions. [2021-06-12 22:18:37,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:18:37,693 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:18:37,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:37,702 INFO L225 Difference]: With dead ends: 6469 [2021-06-12 22:18:37,703 INFO L226 Difference]: Without dead ends: 6146 [2021-06-12 22:18:37,703 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1744.7ms TimeCoverageRelationStatistics Valid=413, Invalid=1939, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:18:37,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6146 states. [2021-06-12 22:18:37,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6146 to 4719. [2021-06-12 22:18:37,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4719 states, 4718 states have (on average 3.5938957185247986) internal successors, (16956), 4718 states have internal predecessors, (16956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4719 states to 4719 states and 16956 transitions. [2021-06-12 22:18:37,791 INFO L78 Accepts]: Start accepts. Automaton has 4719 states and 16956 transitions. Word has length 32 [2021-06-12 22:18:37,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:37,791 INFO L482 AbstractCegarLoop]: Abstraction has 4719 states and 16956 transitions. [2021-06-12 22:18:37,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4719 states and 16956 transitions. [2021-06-12 22:18:37,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:18:37,797 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:37,797 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:37,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 22:18:37,998 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:37,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:37,998 INFO L82 PathProgramCache]: Analyzing trace with hash -500654400, now seen corresponding path program 44 times [2021-06-12 22:18:37,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:37,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013336954] [2021-06-12 22:18:37,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:38,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:38,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013336954] [2021-06-12 22:18:38,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013336954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:38,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545690772] [2021-06-12 22:18:38,439 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 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 22:18:38,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:18:38,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:38,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:18:38,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:38,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-12 22:18:38,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:38,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:38,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:18:38,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-12 22:18:38,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:38,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-12 22:18:38,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:38,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:38,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:18:38,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-12 22:18:38,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:38,698 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-06-12 22:18:38,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-06-12 22:18:38,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:38,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:38,713 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 1 xjuncts. [2021-06-12 22:18:38,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:53 [2021-06-12 22:18:38,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:38,804 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-06-12 22:18:38,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2021-06-12 22:18:38,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:38,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:38,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:18:38,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:53 [2021-06-12 22:18:38,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:38,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:38,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:38,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:38,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:18:38,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 37 [2021-06-12 22:18:39,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:39,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:39,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:18:39,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:48 [2021-06-12 22:18:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:39,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545690772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:39,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:39,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-12 22:18:39,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072270839] [2021-06-12 22:18:39,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 22:18:39,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:39,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 22:18:39,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:18:39,109 INFO L87 Difference]: Start difference. First operand 4719 states and 16956 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:39,475 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-12 22:18:40,296 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2021-06-12 22:18:40,666 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2021-06-12 22:18:41,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:41,882 INFO L93 Difference]: Finished difference Result 7571 states and 25578 transitions. [2021-06-12 22:18:41,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:18:41,883 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:18:41,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:41,893 INFO L225 Difference]: With dead ends: 7571 [2021-06-12 22:18:41,893 INFO L226 Difference]: Without dead ends: 7144 [2021-06-12 22:18:41,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 2579.4ms TimeCoverageRelationStatistics Valid=604, Invalid=2936, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:18:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7144 states. [2021-06-12 22:18:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7144 to 4997. [2021-06-12 22:18:41,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4997 states, 4996 states have (on average 3.5712570056044837) internal successors, (17842), 4996 states have internal predecessors, (17842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4997 states to 4997 states and 17842 transitions. [2021-06-12 22:18:41,964 INFO L78 Accepts]: Start accepts. Automaton has 4997 states and 17842 transitions. Word has length 32 [2021-06-12 22:18:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:41,964 INFO L482 AbstractCegarLoop]: Abstraction has 4997 states and 17842 transitions. [2021-06-12 22:18:41,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:41,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4997 states and 17842 transitions. [2021-06-12 22:18:41,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:18:41,971 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:41,971 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:42,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-12 22:18:42,171 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:42,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:42,172 INFO L82 PathProgramCache]: Analyzing trace with hash 457173692, now seen corresponding path program 45 times [2021-06-12 22:18:42,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:42,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998985168] [2021-06-12 22:18:42,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:42,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:42,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998985168] [2021-06-12 22:18:42,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998985168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:42,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343321653] [2021-06-12 22:18:42,706 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 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 22:18:42,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:18:42,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:42,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 22:18:42,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:42,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:18:42,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:42,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:42,879 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 1 xjuncts. [2021-06-12 22:18:42,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:33 [2021-06-12 22:18:42,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:42,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:18:42,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:42,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:42,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:18:42,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:40 [2021-06-12 22:18:43,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:43,014 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-12 22:18:43,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-12 22:18:43,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:43,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:43,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:18:43,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:53, output treesize:52 [2021-06-12 22:18:43,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:43,163 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-12 22:18:43,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-12 22:18:43,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:43,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:43,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 22:18:43,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:68, output treesize:67 [2021-06-12 22:18:43,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:43,422 INFO L354 Elim1Store]: treesize reduction 104, result has 16.8 percent of original size [2021-06-12 22:18:43,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 37 treesize of output 48 [2021-06-12 22:18:43,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:43,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:43,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2021-06-12 22:18:43,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:75 [2021-06-12 22:18:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:43,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343321653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:43,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:43,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-12 22:18:43,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823017434] [2021-06-12 22:18:43,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 22:18:43,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:43,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 22:18:43,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:18:43,917 INFO L87 Difference]: Start difference. First operand 4997 states and 17842 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:44,344 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2021-06-12 22:18:44,756 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-12 22:18:44,914 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-06-12 22:18:45,368 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-06-12 22:18:45,514 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-06-12 22:18:45,710 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-06-12 22:18:46,563 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2021-06-12 22:18:47,228 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2021-06-12 22:18:48,059 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-06-12 22:18:48,281 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2021-06-12 22:18:48,624 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-06-12 22:18:49,438 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2021-06-12 22:18:49,681 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2021-06-12 22:18:50,165 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2021-06-12 22:18:50,354 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2021-06-12 22:18:54,790 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2021-06-12 22:18:56,516 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 87 [2021-06-12 22:18:57,992 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2021-06-12 22:19:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:00,838 INFO L93 Difference]: Finished difference Result 7614 states and 26316 transitions. [2021-06-12 22:19:00,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 22:19:00,838 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:19:00,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:00,854 INFO L225 Difference]: With dead ends: 7614 [2021-06-12 22:19:00,854 INFO L226 Difference]: Without dead ends: 7468 [2021-06-12 22:19:00,855 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908 ImplicationChecksByTransitivity, 6225.5ms TimeCoverageRelationStatistics Valid=951, Invalid=5369, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 22:19:00,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7468 states. [2021-06-12 22:19:00,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7468 to 5655. [2021-06-12 22:19:00,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5655 states, 5654 states have (on average 3.5951538733639903) internal successors, (20327), 5654 states have internal predecessors, (20327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:01,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5655 states to 5655 states and 20327 transitions. [2021-06-12 22:19:01,005 INFO L78 Accepts]: Start accepts. Automaton has 5655 states and 20327 transitions. Word has length 32 [2021-06-12 22:19:01,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:01,005 INFO L482 AbstractCegarLoop]: Abstraction has 5655 states and 20327 transitions. [2021-06-12 22:19:01,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:01,005 INFO L276 IsEmpty]: Start isEmpty. Operand 5655 states and 20327 transitions. [2021-06-12 22:19:01,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:19:01,013 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:01,013 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:01,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 22:19:01,214 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:01,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:01,214 INFO L82 PathProgramCache]: Analyzing trace with hash 737661248, now seen corresponding path program 46 times [2021-06-12 22:19:01,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:01,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525722870] [2021-06-12 22:19:01,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:01,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:01,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525722870] [2021-06-12 22:19:01,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525722870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:01,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568158220] [2021-06-12 22:19:01,693 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 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 22:19:01,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:19:01,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:01,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:19:01,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:01,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-12 22:19:01,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:01,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:01,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:01,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-12 22:19:01,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:01,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-12 22:19:01,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:01,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:01,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:01,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:36 [2021-06-12 22:19:02,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:02,032 INFO L354 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2021-06-12 22:19:02,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 32 [2021-06-12 22:19:02,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:02,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:02,051 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 1 xjuncts. [2021-06-12 22:19:02,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:48 [2021-06-12 22:19:02,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:02,122 INFO L354 Elim1Store]: treesize reduction 35, result has 12.5 percent of original size [2021-06-12 22:19:02,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2021-06-12 22:19:02,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:02,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:02,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:19:02,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:48 [2021-06-12 22:19:02,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:02,265 INFO L354 Elim1Store]: treesize reduction 72, result has 20.0 percent of original size [2021-06-12 22:19:02,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 42 [2021-06-12 22:19:02,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:02,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:02,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:19:02,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:60 [2021-06-12 22:19:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:02,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568158220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:02,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:02,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-12 22:19:02,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538315193] [2021-06-12 22:19:02,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 22:19:02,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:02,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 22:19:02,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:19:02,550 INFO L87 Difference]: Start difference. First operand 5655 states and 20327 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:07,856 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 81 [2021-06-12 22:19:08,026 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2021-06-12 22:19:08,627 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-06-12 22:19:08,819 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2021-06-12 22:19:09,038 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2021-06-12 22:19:09,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:09,128 INFO L93 Difference]: Finished difference Result 9721 states and 32858 transitions. [2021-06-12 22:19:09,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 22:19:09,129 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:19:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:09,144 INFO L225 Difference]: With dead ends: 9721 [2021-06-12 22:19:09,144 INFO L226 Difference]: Without dead ends: 9341 [2021-06-12 22:19:09,144 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2164 ImplicationChecksByTransitivity, 5292.9ms TimeCoverageRelationStatistics Valid=1229, Invalid=6253, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 22:19:09,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2021-06-12 22:19:09,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 5540. [2021-06-12 22:19:09,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5540 states, 5539 states have (on average 3.6270084852861526) internal successors, (20090), 5539 states have internal predecessors, (20090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:09,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5540 states to 5540 states and 20090 transitions. [2021-06-12 22:19:09,238 INFO L78 Accepts]: Start accepts. Automaton has 5540 states and 20090 transitions. Word has length 32 [2021-06-12 22:19:09,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:09,238 INFO L482 AbstractCegarLoop]: Abstraction has 5540 states and 20090 transitions. [2021-06-12 22:19:09,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 5540 states and 20090 transitions. [2021-06-12 22:19:09,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:19:09,246 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:09,246 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:09,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:09,446 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:09,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:09,447 INFO L82 PathProgramCache]: Analyzing trace with hash -2125295156, now seen corresponding path program 47 times [2021-06-12 22:19:09,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:09,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787947976] [2021-06-12 22:19:09,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:09,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:09,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787947976] [2021-06-12 22:19:09,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787947976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:09,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528357993] [2021-06-12 22:19:09,935 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 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 22:19:09,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:19:09,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:09,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:19:09,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:10,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:19:10,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:10,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:10,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:10,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-12 22:19:10,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:19:10,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:10,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:10,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:10,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-12 22:19:10,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-06-12 22:19:10,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:10,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:10,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:10,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:27 [2021-06-12 22:19:10,235 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-12 22:19:10,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-12 22:19:10,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:10,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:10,248 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 1 xjuncts. [2021-06-12 22:19:10,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:39 [2021-06-12 22:19:10,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:10,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:10,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:19:10,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-06-12 22:19:10,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:10,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:10,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:19:10,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:41 [2021-06-12 22:19:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:10,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528357993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:10,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:10,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 22:19:10,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856625793] [2021-06-12 22:19:10,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 22:19:10,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:10,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 22:19:10,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:19:10,540 INFO L87 Difference]: Start difference. First operand 5540 states and 20090 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:12,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:12,378 INFO L93 Difference]: Finished difference Result 8803 states and 30962 transitions. [2021-06-12 22:19:12,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 22:19:12,379 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:19:12,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:12,394 INFO L225 Difference]: With dead ends: 8803 [2021-06-12 22:19:12,394 INFO L226 Difference]: Without dead ends: 8465 [2021-06-12 22:19:12,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1756.5ms TimeCoverageRelationStatistics Valid=462, Invalid=2844, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:19:12,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8465 states. [2021-06-12 22:19:12,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8465 to 6862. [2021-06-12 22:19:12,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6862 states, 6861 states have (on average 3.6003498032356798) internal successors, (24702), 6861 states have internal predecessors, (24702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:12,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6862 states to 6862 states and 24702 transitions. [2021-06-12 22:19:12,496 INFO L78 Accepts]: Start accepts. Automaton has 6862 states and 24702 transitions. Word has length 32 [2021-06-12 22:19:12,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:12,496 INFO L482 AbstractCegarLoop]: Abstraction has 6862 states and 24702 transitions. [2021-06-12 22:19:12,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand 6862 states and 24702 transitions. [2021-06-12 22:19:12,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:19:12,505 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:12,505 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:12,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 22:19:12,706 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:12,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:12,706 INFO L82 PathProgramCache]: Analyzing trace with hash -787029172, now seen corresponding path program 48 times [2021-06-12 22:19:12,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:12,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913255525] [2021-06-12 22:19:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:13,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:13,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913255525] [2021-06-12 22:19:13,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913255525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:13,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721146777] [2021-06-12 22:19:13,151 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 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 22:19:13,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:19:13,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:13,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:19:13,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:13,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:19:13,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:13,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:13,301 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 1 xjuncts. [2021-06-12 22:19:13,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-06-12 22:19:13,350 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-12 22:19:13,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:19:13,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:13,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:13,363 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 1 xjuncts. [2021-06-12 22:19:13,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:39 [2021-06-12 22:19:13,454 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-12 22:19:13,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-12 22:19:13,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:13,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:13,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:19:13,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:51 [2021-06-12 22:19:13,553 INFO L354 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2021-06-12 22:19:13,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 38 [2021-06-12 22:19:13,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:13,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:13,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:19:13,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:64, output treesize:63 [2021-06-12 22:19:13,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:13,699 INFO L354 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2021-06-12 22:19:13,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-12 22:19:13,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:13,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:13,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:19:13,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:46 [2021-06-12 22:19:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:13,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721146777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:13,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:13,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-12 22:19:13,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121108390] [2021-06-12 22:19:13,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 22:19:13,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:13,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 22:19:13,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:19:13,889 INFO L87 Difference]: Start difference. First operand 6862 states and 24702 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:18,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:18,163 INFO L93 Difference]: Finished difference Result 10382 states and 35158 transitions. [2021-06-12 22:19:18,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:19:18,163 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:19:18,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:18,180 INFO L225 Difference]: With dead ends: 10382 [2021-06-12 22:19:18,181 INFO L226 Difference]: Without dead ends: 10079 [2021-06-12 22:19:18,181 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 3731.9ms TimeCoverageRelationStatistics Valid=964, Invalid=6518, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 22:19:18,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10079 states. [2021-06-12 22:19:18,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10079 to 7386. [2021-06-12 22:19:18,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7386 states, 7385 states have (on average 3.6106973595125256) internal successors, (26665), 7385 states have internal predecessors, (26665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:18,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7386 states to 7386 states and 26665 transitions. [2021-06-12 22:19:18,328 INFO L78 Accepts]: Start accepts. Automaton has 7386 states and 26665 transitions. Word has length 32 [2021-06-12 22:19:18,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:18,329 INFO L482 AbstractCegarLoop]: Abstraction has 7386 states and 26665 transitions. [2021-06-12 22:19:18,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:18,329 INFO L276 IsEmpty]: Start isEmpty. Operand 7386 states and 26665 transitions. [2021-06-12 22:19:18,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:19:18,339 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:18,339 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:18,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:18,539 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:18,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:18,540 INFO L82 PathProgramCache]: Analyzing trace with hash -700345780, now seen corresponding path program 49 times [2021-06-12 22:19:18,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:18,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157945726] [2021-06-12 22:19:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:18,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:18,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157945726] [2021-06-12 22:19:18,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157945726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:18,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476739210] [2021-06-12 22:19:18,947 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 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 22:19:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:18,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 22:19:18,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:19,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:19:19,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:19,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:19,086 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 1 xjuncts. [2021-06-12 22:19:19,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-12 22:19:19,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:19,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:19:19,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:19,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:19,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:19:19,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-06-12 22:19:19,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:19,206 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-12 22:19:19,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-12 22:19:19,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:19,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:19,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:19:19,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:49 [2021-06-12 22:19:19,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:19,310 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-12 22:19:19,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-12 22:19:19,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:19,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:19,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 22:19:19,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:62, output treesize:61 [2021-06-12 22:19:19,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:19,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:19,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:19,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:19:19,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:19,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:19,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:19:19,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2021-06-12 22:19:19,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:19,602 INFO L628 ElimStorePlain]: treesize reduction 7, result has 88.9 percent of original size [2021-06-12 22:19:19,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 22:19:19,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:71, output treesize:51 [2021-06-12 22:19:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:21,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476739210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:21,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:21,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-06-12 22:19:21,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918356406] [2021-06-12 22:19:21,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 22:19:21,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:21,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 22:19:21,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=592, Unknown=1, NotChecked=0, Total=702 [2021-06-12 22:19:21,838 INFO L87 Difference]: Start difference. First operand 7386 states and 26665 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:22,725 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2021-06-12 22:19:24,142 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-06-12 22:19:25,605 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-06-12 22:19:29,486 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-12 22:19:32,725 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-06-12 22:19:34,099 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-06-12 22:19:36,372 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-12 22:19:37,520 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-12 22:19:39,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:39,227 INFO L93 Difference]: Finished difference Result 13949 states and 48004 transitions. [2021-06-12 22:19:39,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 22:19:39,228 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:19:39,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:39,251 INFO L225 Difference]: With dead ends: 13949 [2021-06-12 22:19:39,251 INFO L226 Difference]: Without dead ends: 12941 [2021-06-12 22:19:39,252 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 12433.0ms TimeCoverageRelationStatistics Valid=957, Invalid=4444, Unknown=1, NotChecked=0, Total=5402 [2021-06-12 22:19:39,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12941 states. [2021-06-12 22:19:39,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12941 to 9690. [2021-06-12 22:19:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9690 states, 9689 states have (on average 3.617297966766436) internal successors, (35048), 9689 states have internal predecessors, (35048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9690 states to 9690 states and 35048 transitions. [2021-06-12 22:19:39,432 INFO L78 Accepts]: Start accepts. Automaton has 9690 states and 35048 transitions. Word has length 32 [2021-06-12 22:19:39,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:39,432 INFO L482 AbstractCegarLoop]: Abstraction has 9690 states and 35048 transitions. [2021-06-12 22:19:39,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand 9690 states and 35048 transitions. [2021-06-12 22:19:39,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:19:39,446 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:39,446 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:39,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-12 22:19:39,646 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:39,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:39,647 INFO L82 PathProgramCache]: Analyzing trace with hash -643597936, now seen corresponding path program 50 times [2021-06-12 22:19:39,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:39,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233354720] [2021-06-12 22:19:39,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:40,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:40,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233354720] [2021-06-12 22:19:40,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233354720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:40,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862770489] [2021-06-12 22:19:40,199 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 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 22:19:40,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:19:40,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:40,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:19:40,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:40,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:19:40,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:40,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:40,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:40,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 22:19:40,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:19:40,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:40,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:40,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:40,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:33 [2021-06-12 22:19:40,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-06-12 22:19:40,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:40,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:40,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:40,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:33 [2021-06-12 22:19:40,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2021-06-12 22:19:40,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:40,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:40,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:40,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:40 [2021-06-12 22:19:40,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:40,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:40,583 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-12 22:19:40,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 38 [2021-06-12 22:19:40,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:40,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:40,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:40,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-06-12 22:19:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:40,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862770489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:40,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:40,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-12 22:19:40,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388599570] [2021-06-12 22:19:40,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 22:19:40,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:40,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 22:19:40,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:19:40,729 INFO L87 Difference]: Start difference. First operand 9690 states and 35048 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:41,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:41,868 INFO L93 Difference]: Finished difference Result 10881 states and 38680 transitions. [2021-06-12 22:19:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:19:41,868 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:19:41,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:41,886 INFO L225 Difference]: With dead ends: 10881 [2021-06-12 22:19:41,886 INFO L226 Difference]: Without dead ends: 10561 [2021-06-12 22:19:41,886 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1369.3ms TimeCoverageRelationStatistics Valid=299, Invalid=1863, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:19:41,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-06-12 22:19:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 9690. [2021-06-12 22:19:42,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9690 states, 9689 states have (on average 3.6100732789761585) internal successors, (34978), 9689 states have internal predecessors, (34978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:42,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9690 states to 9690 states and 34978 transitions. [2021-06-12 22:19:42,034 INFO L78 Accepts]: Start accepts. Automaton has 9690 states and 34978 transitions. Word has length 32 [2021-06-12 22:19:42,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:42,034 INFO L482 AbstractCegarLoop]: Abstraction has 9690 states and 34978 transitions. [2021-06-12 22:19:42,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:42,034 INFO L276 IsEmpty]: Start isEmpty. Operand 9690 states and 34978 transitions. [2021-06-12 22:19:42,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:19:42,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:42,047 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:42,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:42,247 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:42,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:42,247 INFO L82 PathProgramCache]: Analyzing trace with hash 42131912, now seen corresponding path program 51 times [2021-06-12 22:19:42,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:42,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312697900] [2021-06-12 22:19:42,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:42,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:42,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312697900] [2021-06-12 22:19:42,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312697900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:42,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167142782] [2021-06-12 22:19:42,715 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 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 22:19:42,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:19:42,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:42,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 22:19:42,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:42,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-12 22:19:42,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:42,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:42,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:42,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-06-12 22:19:42,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:42,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-12 22:19:42,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:42,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:42,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:42,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-12 22:19:42,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-06-12 22:19:42,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:42,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:42,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:42,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:24 [2021-06-12 22:19:42,925 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-12 22:19:42,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-12 22:19:42,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:42,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:42,937 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 1 xjuncts. [2021-06-12 22:19:42,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:36 [2021-06-12 22:19:43,001 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-12 22:19:43,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-12 22:19:43,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:43,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:43,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:19:43,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:43 [2021-06-12 22:19:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:43,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167142782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:43,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:43,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2021-06-12 22:19:43,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109961652] [2021-06-12 22:19:43,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:19:43,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:43,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:19:43,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:19:43,105 INFO L87 Difference]: Start difference. First operand 9690 states and 34978 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:44,151 INFO L93 Difference]: Finished difference Result 13901 states and 49107 transitions. [2021-06-12 22:19:44,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:19:44,151 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:19:44,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:44,175 INFO L225 Difference]: With dead ends: 13901 [2021-06-12 22:19:44,175 INFO L226 Difference]: Without dead ends: 13475 [2021-06-12 22:19:44,175 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1021.9ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:19:44,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13475 states. [2021-06-12 22:19:44,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13475 to 8431. [2021-06-12 22:19:44,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8431 states, 8430 states have (on average 3.5896797153024913) internal successors, (30261), 8430 states have internal predecessors, (30261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:44,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8431 states to 8431 states and 30261 transitions. [2021-06-12 22:19:44,321 INFO L78 Accepts]: Start accepts. Automaton has 8431 states and 30261 transitions. Word has length 32 [2021-06-12 22:19:44,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:44,321 INFO L482 AbstractCegarLoop]: Abstraction has 8431 states and 30261 transitions. [2021-06-12 22:19:44,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:44,321 INFO L276 IsEmpty]: Start isEmpty. Operand 8431 states and 30261 transitions. [2021-06-12 22:19:44,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:19:44,333 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:44,333 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:44,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:44,537 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:44,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:44,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1250586420, now seen corresponding path program 52 times [2021-06-12 22:19:44,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:44,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454498753] [2021-06-12 22:19:44,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:44,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:44,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454498753] [2021-06-12 22:19:44,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454498753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:44,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99540492] [2021-06-12 22:19:44,910 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 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 22:19:44,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:19:44,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:44,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 22:19:44,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:45,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-12 22:19:45,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:45,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:45,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:45,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-12 22:19:45,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:19:45,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:45,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:45,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:45,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-12 22:19:45,192 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-12 22:19:45,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-12 22:19:45,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:45,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:45,207 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 1 xjuncts. [2021-06-12 22:19:45,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:44 [2021-06-12 22:19:45,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:45,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:19:45,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:19:45,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-06-12 22:19:45,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:45,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:45,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 22:19:45,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:34 [2021-06-12 22:19:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:45,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99540492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:45,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:45,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-12 22:19:45,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518883509] [2021-06-12 22:19:45,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 22:19:45,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:45,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 22:19:45,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:19:45,365 INFO L87 Difference]: Start difference. First operand 8431 states and 30261 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:45,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:45,982 INFO L93 Difference]: Finished difference Result 10312 states and 36179 transitions. [2021-06-12 22:19:45,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:19:45,982 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:19:45,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:45,999 INFO L225 Difference]: With dead ends: 10312 [2021-06-12 22:19:45,999 INFO L226 Difference]: Without dead ends: 10002 [2021-06-12 22:19:45,999 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 822.5ms TimeCoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:19:46,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10002 states. [2021-06-12 22:19:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10002 to 8831. [2021-06-12 22:19:46,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8831 states, 8830 states have (on average 3.5691959229898074) internal successors, (31516), 8830 states have internal predecessors, (31516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:46,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8831 states to 8831 states and 31516 transitions. [2021-06-12 22:19:46,130 INFO L78 Accepts]: Start accepts. Automaton has 8831 states and 31516 transitions. Word has length 32 [2021-06-12 22:19:46,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:46,130 INFO L482 AbstractCegarLoop]: Abstraction has 8831 states and 31516 transitions. [2021-06-12 22:19:46,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:46,130 INFO L276 IsEmpty]: Start isEmpty. Operand 8831 states and 31516 transitions. [2021-06-12 22:19:46,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 22:19:46,142 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:46,142 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:46,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:46,343 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:46,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:46,343 INFO L82 PathProgramCache]: Analyzing trace with hash -564856572, now seen corresponding path program 53 times [2021-06-12 22:19:46,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:46,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375816870] [2021-06-12 22:19:46,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:46,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:46,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375816870] [2021-06-12 22:19:46,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375816870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:46,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955457524] [2021-06-12 22:19:46,785 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 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 22:19:46,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:19:46,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:46,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 22:19:46,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:46,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:19:46,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:46,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:46,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:46,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:17 [2021-06-12 22:19:46,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:19:46,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:46,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:46,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:19:46,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-06-12 22:19:46,993 INFO L354 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2021-06-12 22:19:46,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2021-06-12 22:19:46,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:47,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:47,009 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 1 xjuncts. [2021-06-12 22:19:47,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:36 [2021-06-12 22:19:47,133 INFO L354 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2021-06-12 22:19:47,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 38 [2021-06-12 22:19:47,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:47,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:47,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:19:47,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:51 [2021-06-12 22:19:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:47,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955457524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:47,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:47,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-06-12 22:19:47,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480176720] [2021-06-12 22:19:47,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 22:19:47,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:47,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 22:19:47,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:19:47,351 INFO L87 Difference]: Start difference. First operand 8831 states and 31516 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:49,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:49,046 INFO L93 Difference]: Finished difference Result 16437 states and 56867 transitions. [2021-06-12 22:19:49,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:19:49,046 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-12 22:19:49,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:49,077 INFO L225 Difference]: With dead ends: 16437 [2021-06-12 22:19:49,077 INFO L226 Difference]: Without dead ends: 15835 [2021-06-12 22:19:49,077 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1488.3ms TimeCoverageRelationStatistics Valid=422, Invalid=2334, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 22:19:49,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15835 states. [2021-06-12 22:19:49,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15835 to 8581. [2021-06-12 22:19:49,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8581 states, 8580 states have (on average 3.5440559440559443) internal successors, (30408), 8580 states have internal predecessors, (30408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:49,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8581 states to 8581 states and 30408 transitions. [2021-06-12 22:19:49,252 INFO L78 Accepts]: Start accepts. Automaton has 8581 states and 30408 transitions. Word has length 32 [2021-06-12 22:19:49,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:49,252 INFO L482 AbstractCegarLoop]: Abstraction has 8581 states and 30408 transitions. [2021-06-12 22:19:49,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:49,252 INFO L276 IsEmpty]: Start isEmpty. Operand 8581 states and 30408 transitions. [2021-06-12 22:19:49,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:19:49,264 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:49,264 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:49,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-12 22:19:49,465 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:49,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:49,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1781126392, now seen corresponding path program 54 times [2021-06-12 22:19:49,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:49,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758830992] [2021-06-12 22:19:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:49,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:49,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758830992] [2021-06-12 22:19:49,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758830992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:49,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013861067] [2021-06-12 22:19:49,535 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 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 22:19:49,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:19:49,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:49,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:19:49,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:19:49,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013861067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:49,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:49,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-12 22:19:49,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142732092] [2021-06-12 22:19:49,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:19:49,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:49,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:19:49,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:19:49,723 INFO L87 Difference]: Start difference. First operand 8581 states and 30408 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:52,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:52,851 INFO L93 Difference]: Finished difference Result 24214 states and 79256 transitions. [2021-06-12 22:19:52,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-06-12 22:19:52,851 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:19:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:52,889 INFO L225 Difference]: With dead ends: 24214 [2021-06-12 22:19:52,889 INFO L226 Difference]: Without dead ends: 24214 [2021-06-12 22:19:52,890 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7207 ImplicationChecksByTransitivity, 2048.3ms TimeCoverageRelationStatistics Valid=3677, Invalid=15505, Unknown=0, NotChecked=0, Total=19182 [2021-06-12 22:19:52,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24214 states. [2021-06-12 22:19:53,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24214 to 9398. [2021-06-12 22:19:53,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 3.6118974140683195) internal successors, (33941), 9397 states have internal predecessors, (33941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:53,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 33941 transitions. [2021-06-12 22:19:53,166 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 33941 transitions. Word has length 36 [2021-06-12 22:19:53,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:53,166 INFO L482 AbstractCegarLoop]: Abstraction has 9398 states and 33941 transitions. [2021-06-12 22:19:53,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:53,166 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 33941 transitions. [2021-06-12 22:19:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:19:53,179 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:53,179 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:53,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:53,380 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:53,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:53,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1765665596, now seen corresponding path program 55 times [2021-06-12 22:19:53,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:53,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218482823] [2021-06-12 22:19:53,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:53,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:53,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218482823] [2021-06-12 22:19:53,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218482823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:53,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262009723] [2021-06-12 22:19:53,458 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 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 22:19:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:53,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:19:53,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:53,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262009723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:53,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:53,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 22:19:53,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156832753] [2021-06-12 22:19:53,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:19:53,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:53,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:19:53,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:19:53,851 INFO L87 Difference]: Start difference. First operand 9398 states and 33941 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:55,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:55,405 INFO L93 Difference]: Finished difference Result 23183 states and 75907 transitions. [2021-06-12 22:19:55,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:19:55,459 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:19:55,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:55,498 INFO L225 Difference]: With dead ends: 23183 [2021-06-12 22:19:55,498 INFO L226 Difference]: Without dead ends: 23183 [2021-06-12 22:19:55,498 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2349 ImplicationChecksByTransitivity, 1032.0ms TimeCoverageRelationStatistics Valid=1560, Invalid=5246, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 22:19:55,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23183 states. [2021-06-12 22:19:55,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23183 to 9263. [2021-06-12 22:19:55,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9263 states, 9262 states have (on average 3.587670049665299) internal successors, (33229), 9262 states have internal predecessors, (33229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:55,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9263 states to 9263 states and 33229 transitions. [2021-06-12 22:19:55,748 INFO L78 Accepts]: Start accepts. Automaton has 9263 states and 33229 transitions. Word has length 36 [2021-06-12 22:19:55,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:55,749 INFO L482 AbstractCegarLoop]: Abstraction has 9263 states and 33229 transitions. [2021-06-12 22:19:55,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:55,749 INFO L276 IsEmpty]: Start isEmpty. Operand 9263 states and 33229 transitions. [2021-06-12 22:19:55,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:19:55,761 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:55,761 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:55,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:55,962 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:55,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:55,962 INFO L82 PathProgramCache]: Analyzing trace with hash -610681024, now seen corresponding path program 56 times [2021-06-12 22:19:55,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:55,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795828537] [2021-06-12 22:19:55,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:56,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:56,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795828537] [2021-06-12 22:19:56,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795828537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:56,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139787241] [2021-06-12 22:19:56,035 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 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 22:19:56,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:19:56,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:56,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:19:56,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:56,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139787241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:56,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:56,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 22:19:56,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767468707] [2021-06-12 22:19:56,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:19:56,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:56,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:19:56,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:19:56,218 INFO L87 Difference]: Start difference. First operand 9263 states and 33229 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:57,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:57,257 INFO L93 Difference]: Finished difference Result 19614 states and 64898 transitions. [2021-06-12 22:19:57,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:19:57,257 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:19:57,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:57,292 INFO L225 Difference]: With dead ends: 19614 [2021-06-12 22:19:57,292 INFO L226 Difference]: Without dead ends: 19614 [2021-06-12 22:19:57,293 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 606.0ms TimeCoverageRelationStatistics Valid=763, Invalid=2777, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:19:57,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19614 states. [2021-06-12 22:19:57,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19614 to 9363. [2021-06-12 22:19:57,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9363 states, 9362 states have (on average 3.5803247169408245) internal successors, (33519), 9362 states have internal predecessors, (33519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:57,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9363 states to 9363 states and 33519 transitions. [2021-06-12 22:19:57,559 INFO L78 Accepts]: Start accepts. Automaton has 9363 states and 33519 transitions. Word has length 36 [2021-06-12 22:19:57,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:57,559 INFO L482 AbstractCegarLoop]: Abstraction has 9363 states and 33519 transitions. [2021-06-12 22:19:57,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:57,559 INFO L276 IsEmpty]: Start isEmpty. Operand 9363 states and 33519 transitions. [2021-06-12 22:19:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:19:57,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:57,573 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:57,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-12 22:19:57,773 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:57,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:57,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2146021892, now seen corresponding path program 57 times [2021-06-12 22:19:57,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:57,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921942656] [2021-06-12 22:19:57,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:57,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:57,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921942656] [2021-06-12 22:19:57,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921942656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:57,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220682308] [2021-06-12 22:19:57,940 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 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 22:19:57,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:19:57,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:57,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 22:19:57,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:58,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:19:58,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:58,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:58,087 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 1 xjuncts. [2021-06-12 22:19:58,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:25 [2021-06-12 22:19:58,129 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-12 22:19:58,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:19:58,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:58,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:58,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:19:58,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:37 [2021-06-12 22:19:58,265 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-12 22:19:58,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-12 22:19:58,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:19:58,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:19:58,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:19:58,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:46 [2021-06-12 22:19:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-12 22:19:58,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220682308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:58,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:58,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-12 22:19:58,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820467945] [2021-06-12 22:19:58,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:19:58,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:58,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:19:58,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:19:58,408 INFO L87 Difference]: Start difference. First operand 9363 states and 33519 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:05,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:05,763 INFO L93 Difference]: Finished difference Result 23064 states and 74612 transitions. [2021-06-12 22:20:05,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-06-12 22:20:05,763 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:05,799 INFO L225 Difference]: With dead ends: 23064 [2021-06-12 22:20:05,799 INFO L226 Difference]: Without dead ends: 22846 [2021-06-12 22:20:05,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9982 ImplicationChecksByTransitivity, 3821.4ms TimeCoverageRelationStatistics Valid=3338, Invalid=23068, Unknown=0, NotChecked=0, Total=26406 [2021-06-12 22:20:05,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22846 states. [2021-06-12 22:20:06,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22846 to 10239. [2021-06-12 22:20:06,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10239 states, 10238 states have (on average 3.6391873412775935) internal successors, (37258), 10238 states have internal predecessors, (37258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:06,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10239 states to 10239 states and 37258 transitions. [2021-06-12 22:20:06,100 INFO L78 Accepts]: Start accepts. Automaton has 10239 states and 37258 transitions. Word has length 36 [2021-06-12 22:20:06,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:06,100 INFO L482 AbstractCegarLoop]: Abstraction has 10239 states and 37258 transitions. [2021-06-12 22:20:06,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:06,100 INFO L276 IsEmpty]: Start isEmpty. Operand 10239 states and 37258 transitions. [2021-06-12 22:20:06,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:06,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:06,115 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:06,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-12 22:20:06,316 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:06,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:06,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1242329482, now seen corresponding path program 58 times [2021-06-12 22:20:06,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:06,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642212913] [2021-06-12 22:20:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:06,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:06,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642212913] [2021-06-12 22:20:06,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642212913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:06,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098398827] [2021-06-12 22:20:06,360 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 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 22:20:06,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:20:06,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:06,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:20:06,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:06,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098398827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:06,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:06,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-12 22:20:06,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618961121] [2021-06-12 22:20:06,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:20:06,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:06,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:20:06,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:20:06,544 INFO L87 Difference]: Start difference. First operand 10239 states and 37258 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:08,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:08,829 INFO L93 Difference]: Finished difference Result 24062 states and 79366 transitions. [2021-06-12 22:20:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-12 22:20:08,830 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:08,871 INFO L225 Difference]: With dead ends: 24062 [2021-06-12 22:20:08,872 INFO L226 Difference]: Without dead ends: 24054 [2021-06-12 22:20:08,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4827 ImplicationChecksByTransitivity, 1386.1ms TimeCoverageRelationStatistics Valid=2444, Invalid=10212, Unknown=0, NotChecked=0, Total=12656 [2021-06-12 22:20:08,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24054 states. [2021-06-12 22:20:09,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24054 to 10176. [2021-06-12 22:20:09,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10176 states, 10175 states have (on average 3.6354791154791153) internal successors, (36991), 10175 states have internal predecessors, (36991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10176 states to 10176 states and 36991 transitions. [2021-06-12 22:20:09,281 INFO L78 Accepts]: Start accepts. Automaton has 10176 states and 36991 transitions. Word has length 36 [2021-06-12 22:20:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:09,281 INFO L482 AbstractCegarLoop]: Abstraction has 10176 states and 36991 transitions. [2021-06-12 22:20:09,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 10176 states and 36991 transitions. [2021-06-12 22:20:09,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:09,296 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:09,296 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:09,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:09,497 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:09,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:09,497 INFO L82 PathProgramCache]: Analyzing trace with hash -999630980, now seen corresponding path program 59 times [2021-06-12 22:20:09,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:09,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196378996] [2021-06-12 22:20:09,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:09,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:09,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196378996] [2021-06-12 22:20:09,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196378996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:09,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192015810] [2021-06-12 22:20:09,546 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 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 22:20:09,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:20:09,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:09,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:20:09,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:09,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192015810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:09,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:09,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-12 22:20:09,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954976134] [2021-06-12 22:20:09,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:20:09,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:09,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:20:09,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:20:09,747 INFO L87 Difference]: Start difference. First operand 10176 states and 36991 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:12,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:12,801 INFO L93 Difference]: Finished difference Result 27302 states and 90504 transitions. [2021-06-12 22:20:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-06-12 22:20:12,801 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:12,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:12,853 INFO L225 Difference]: With dead ends: 27302 [2021-06-12 22:20:12,853 INFO L226 Difference]: Without dead ends: 27302 [2021-06-12 22:20:12,855 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8677 ImplicationChecksByTransitivity, 2000.9ms TimeCoverageRelationStatistics Valid=3708, Invalid=17754, Unknown=0, NotChecked=0, Total=21462 [2021-06-12 22:20:12,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27302 states. [2021-06-12 22:20:13,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27302 to 10278. [2021-06-12 22:20:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10278 states, 10277 states have (on average 3.647562518244624) internal successors, (37486), 10277 states have internal predecessors, (37486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10278 states to 10278 states and 37486 transitions. [2021-06-12 22:20:13,295 INFO L78 Accepts]: Start accepts. Automaton has 10278 states and 37486 transitions. Word has length 36 [2021-06-12 22:20:13,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:13,295 INFO L482 AbstractCegarLoop]: Abstraction has 10278 states and 37486 transitions. [2021-06-12 22:20:13,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:13,296 INFO L276 IsEmpty]: Start isEmpty. Operand 10278 states and 37486 transitions. [2021-06-12 22:20:13,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:13,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:13,310 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:13,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:13,511 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:13,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:13,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1594791238, now seen corresponding path program 60 times [2021-06-12 22:20:13,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:13,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611946815] [2021-06-12 22:20:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:13,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:13,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611946815] [2021-06-12 22:20:13,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611946815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:13,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692116589] [2021-06-12 22:20:13,564 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 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 22:20:13,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 22:20:13,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:13,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:20:13,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:13,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692116589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:13,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:13,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-12 22:20:13,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629105290] [2021-06-12 22:20:13,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:20:13,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:13,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:20:13,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:20:13,794 INFO L87 Difference]: Start difference. First operand 10278 states and 37486 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:14,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:14,777 INFO L93 Difference]: Finished difference Result 23076 states and 77948 transitions. [2021-06-12 22:20:14,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:20:14,777 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:14,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:14,817 INFO L225 Difference]: With dead ends: 23076 [2021-06-12 22:20:14,817 INFO L226 Difference]: Without dead ends: 23064 [2021-06-12 22:20:14,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 571.9ms TimeCoverageRelationStatistics Valid=771, Invalid=2535, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:20:14,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23064 states. [2021-06-12 22:20:15,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23064 to 10277. [2021-06-12 22:20:15,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10277 states, 10276 states have (on average 3.6474309069676916) internal successors, (37481), 10276 states have internal predecessors, (37481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:15,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10277 states to 10277 states and 37481 transitions. [2021-06-12 22:20:15,208 INFO L78 Accepts]: Start accepts. Automaton has 10277 states and 37481 transitions. Word has length 36 [2021-06-12 22:20:15,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:15,209 INFO L482 AbstractCegarLoop]: Abstraction has 10277 states and 37481 transitions. [2021-06-12 22:20:15,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:15,209 INFO L276 IsEmpty]: Start isEmpty. Operand 10277 states and 37481 transitions. [2021-06-12 22:20:15,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:15,223 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:15,223 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:15,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:15,423 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:15,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:15,424 INFO L82 PathProgramCache]: Analyzing trace with hash 619738612, now seen corresponding path program 61 times [2021-06-12 22:20:15,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:15,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165199977] [2021-06-12 22:20:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:15,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:15,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165199977] [2021-06-12 22:20:15,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165199977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:15,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208241674] [2021-06-12 22:20:15,491 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 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 22:20:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:15,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:20:15,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:15,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208241674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:15,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:15,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 22:20:15,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284358601] [2021-06-12 22:20:15,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:20:15,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:15,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:20:15,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:20:15,668 INFO L87 Difference]: Start difference. First operand 10277 states and 37481 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:16,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:16,527 INFO L93 Difference]: Finished difference Result 21184 states and 71447 transitions. [2021-06-12 22:20:16,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:20:16,527 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:16,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:16,564 INFO L225 Difference]: With dead ends: 21184 [2021-06-12 22:20:16,564 INFO L226 Difference]: Without dead ends: 21184 [2021-06-12 22:20:16,565 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 514.2ms TimeCoverageRelationStatistics Valid=579, Invalid=1971, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:20:16,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21184 states. [2021-06-12 22:20:16,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21184 to 10309. [2021-06-12 22:20:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10309 states, 10308 states have (on average 3.646779200620877) internal successors, (37591), 10308 states have internal predecessors, (37591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:16,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10309 states to 10309 states and 37591 transitions. [2021-06-12 22:20:16,890 INFO L78 Accepts]: Start accepts. Automaton has 10309 states and 37591 transitions. Word has length 36 [2021-06-12 22:20:16,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:16,890 INFO L482 AbstractCegarLoop]: Abstraction has 10309 states and 37591 transitions. [2021-06-12 22:20:16,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:16,890 INFO L276 IsEmpty]: Start isEmpty. Operand 10309 states and 37591 transitions. [2021-06-12 22:20:16,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:16,907 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:16,907 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:17,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:17,107 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:17,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:17,108 INFO L82 PathProgramCache]: Analyzing trace with hash 334296516, now seen corresponding path program 62 times [2021-06-12 22:20:17,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:17,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284986339] [2021-06-12 22:20:17,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:17,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:17,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284986339] [2021-06-12 22:20:17,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284986339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:17,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35861080] [2021-06-12 22:20:17,172 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 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 22:20:17,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:17,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:17,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:20:17,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:17,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35861080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:17,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:17,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 22:20:17,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16834867] [2021-06-12 22:20:17,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:20:17,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:17,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:20:17,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:20:17,375 INFO L87 Difference]: Start difference. First operand 10309 states and 37591 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:18,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:18,582 INFO L93 Difference]: Finished difference Result 22583 states and 75226 transitions. [2021-06-12 22:20:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 22:20:18,583 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:18,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:18,698 INFO L225 Difference]: With dead ends: 22583 [2021-06-12 22:20:18,698 INFO L226 Difference]: Without dead ends: 22583 [2021-06-12 22:20:18,698 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 745.9ms TimeCoverageRelationStatistics Valid=1128, Invalid=3984, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 22:20:18,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22583 states. [2021-06-12 22:20:18,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22583 to 10288. [2021-06-12 22:20:18,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10288 states, 10287 states have (on average 3.621950034023525) internal successors, (37259), 10287 states have internal predecessors, (37259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10288 states to 10288 states and 37259 transitions. [2021-06-12 22:20:18,978 INFO L78 Accepts]: Start accepts. Automaton has 10288 states and 37259 transitions. Word has length 36 [2021-06-12 22:20:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:18,978 INFO L482 AbstractCegarLoop]: Abstraction has 10288 states and 37259 transitions. [2021-06-12 22:20:18,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 10288 states and 37259 transitions. [2021-06-12 22:20:18,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:18,993 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:18,993 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:19,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:19,194 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:19,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:19,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1645233024, now seen corresponding path program 63 times [2021-06-12 22:20:19,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:19,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52109350] [2021-06-12 22:20:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:19,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:19,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52109350] [2021-06-12 22:20:19,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52109350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:19,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768774234] [2021-06-12 22:20:19,256 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 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 22:20:19,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:20:19,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:19,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 22:20:19,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:19,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:20:19,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:20:19,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:20:19,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:20:19,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:22 [2021-06-12 22:20:19,440 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-12 22:20:19,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:20:19,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:20:19,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:20:19,452 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 1 xjuncts. [2021-06-12 22:20:19,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:34 [2021-06-12 22:20:19,530 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-12 22:20:19,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-12 22:20:19,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:20:19,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:20:19,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:20:19,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:49 [2021-06-12 22:20:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-06-12 22:20:19,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768774234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:19,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:19,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-12 22:20:19,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918203653] [2021-06-12 22:20:19,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:20:19,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:19,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:20:19,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:20:19,704 INFO L87 Difference]: Start difference. First operand 10288 states and 37259 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:24,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:24,075 INFO L93 Difference]: Finished difference Result 20591 states and 67124 transitions. [2021-06-12 22:20:24,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-12 22:20:24,075 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:24,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:24,109 INFO L225 Difference]: With dead ends: 20591 [2021-06-12 22:20:24,109 INFO L226 Difference]: Without dead ends: 20576 [2021-06-12 22:20:24,110 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5098 ImplicationChecksByTransitivity, 2955.3ms TimeCoverageRelationStatistics Valid=1942, Invalid=12578, Unknown=0, NotChecked=0, Total=14520 [2021-06-12 22:20:24,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20576 states. [2021-06-12 22:20:24,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20576 to 11680. [2021-06-12 22:20:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11680 states, 11679 states have (on average 3.5503895881496703) internal successors, (41465), 11679 states have internal predecessors, (41465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:24,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11680 states to 11680 states and 41465 transitions. [2021-06-12 22:20:24,444 INFO L78 Accepts]: Start accepts. Automaton has 11680 states and 41465 transitions. Word has length 36 [2021-06-12 22:20:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:24,444 INFO L482 AbstractCegarLoop]: Abstraction has 11680 states and 41465 transitions. [2021-06-12 22:20:24,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:24,445 INFO L276 IsEmpty]: Start isEmpty. Operand 11680 states and 41465 transitions. [2021-06-12 22:20:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:24,462 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:24,462 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:24,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-12 22:20:24,663 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:24,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:24,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1594356878, now seen corresponding path program 64 times [2021-06-12 22:20:24,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:24,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336250552] [2021-06-12 22:20:24,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:24,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:24,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336250552] [2021-06-12 22:20:24,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336250552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:24,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580820048] [2021-06-12 22:20:24,729 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 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 22:20:24,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:20:24,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:24,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:20:24,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:24,914 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:24,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580820048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:24,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:24,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-12 22:20:24,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243110656] [2021-06-12 22:20:24,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:20:24,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:24,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:20:24,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:20:24,915 INFO L87 Difference]: Start difference. First operand 11680 states and 41465 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:27,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:27,292 INFO L93 Difference]: Finished difference Result 24526 states and 80567 transitions. [2021-06-12 22:20:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-12 22:20:27,293 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:27,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:27,334 INFO L225 Difference]: With dead ends: 24526 [2021-06-12 22:20:27,334 INFO L226 Difference]: Without dead ends: 24518 [2021-06-12 22:20:27,335 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 1556.6ms TimeCoverageRelationStatistics Valid=2276, Invalid=11766, Unknown=0, NotChecked=0, Total=14042 [2021-06-12 22:20:27,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24518 states. [2021-06-12 22:20:27,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24518 to 10224. [2021-06-12 22:20:27,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10224 states, 10223 states have (on average 3.5769343636897193) internal successors, (36567), 10223 states have internal predecessors, (36567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:27,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10224 states to 10224 states and 36567 transitions. [2021-06-12 22:20:27,618 INFO L78 Accepts]: Start accepts. Automaton has 10224 states and 36567 transitions. Word has length 36 [2021-06-12 22:20:27,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:27,618 INFO L482 AbstractCegarLoop]: Abstraction has 10224 states and 36567 transitions. [2021-06-12 22:20:27,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:27,618 INFO L276 IsEmpty]: Start isEmpty. Operand 10224 states and 36567 transitions. [2021-06-12 22:20:27,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:27,633 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:27,633 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:27,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:27,833 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:27,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:27,834 INFO L82 PathProgramCache]: Analyzing trace with hash 649769798, now seen corresponding path program 22 times [2021-06-12 22:20:27,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:27,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815201115] [2021-06-12 22:20:27,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:27,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:27,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815201115] [2021-06-12 22:20:27,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815201115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:27,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190938561] [2021-06-12 22:20:27,888 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 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 22:20:27,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:20:27,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:27,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:20:27,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:28,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190938561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:28,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:28,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-12 22:20:28,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814410028] [2021-06-12 22:20:28,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:20:28,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:28,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:20:28,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:20:28,059 INFO L87 Difference]: Start difference. First operand 10224 states and 36567 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:29,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:29,315 INFO L93 Difference]: Finished difference Result 23351 states and 75809 transitions. [2021-06-12 22:20:29,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-12 22:20:29,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:29,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:29,357 INFO L225 Difference]: With dead ends: 23351 [2021-06-12 22:20:29,357 INFO L226 Difference]: Without dead ends: 23351 [2021-06-12 22:20:29,358 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 784.9ms TimeCoverageRelationStatistics Valid=1338, Invalid=4514, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 22:20:29,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23351 states. [2021-06-12 22:20:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23351 to 10314. [2021-06-12 22:20:29,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10314 states, 10313 states have (on average 3.570638999321245) internal successors, (36824), 10313 states have internal predecessors, (36824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:29,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10314 states to 10314 states and 36824 transitions. [2021-06-12 22:20:29,694 INFO L78 Accepts]: Start accepts. Automaton has 10314 states and 36824 transitions. Word has length 36 [2021-06-12 22:20:29,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:29,695 INFO L482 AbstractCegarLoop]: Abstraction has 10314 states and 36824 transitions. [2021-06-12 22:20:29,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:29,695 INFO L276 IsEmpty]: Start isEmpty. Operand 10314 states and 36824 transitions. [2021-06-12 22:20:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:29,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:29,709 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:29,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-12 22:20:29,910 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:29,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:29,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1914163660, now seen corresponding path program 23 times [2021-06-12 22:20:29,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:29,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894532468] [2021-06-12 22:20:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:29,965 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:29,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:29,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894532468] [2021-06-12 22:20:29,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894532468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:29,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419636130] [2021-06-12 22:20:29,965 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 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 22:20:29,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 22:20:29,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:29,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:20:29,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:30,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419636130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:30,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:30,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 22:20:30,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992566326] [2021-06-12 22:20:30,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:20:30,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:30,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:20:30,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:20:30,151 INFO L87 Difference]: Start difference. First operand 10314 states and 36824 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:33,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:33,659 INFO L93 Difference]: Finished difference Result 25345 states and 80932 transitions. [2021-06-12 22:20:33,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-12 22:20:33,660 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:33,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:33,708 INFO L225 Difference]: With dead ends: 25345 [2021-06-12 22:20:33,708 INFO L226 Difference]: Without dead ends: 25341 [2021-06-12 22:20:33,710 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12290 ImplicationChecksByTransitivity, 2490.3ms TimeCoverageRelationStatistics Valid=4827, Invalid=25275, Unknown=0, NotChecked=0, Total=30102 [2021-06-12 22:20:33,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25341 states. [2021-06-12 22:20:33,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25341 to 10697. [2021-06-12 22:20:33,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10697 states, 10696 states have (on average 3.5331899775617055) internal successors, (37791), 10696 states have internal predecessors, (37791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:34,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10697 states to 10697 states and 37791 transitions. [2021-06-12 22:20:34,013 INFO L78 Accepts]: Start accepts. Automaton has 10697 states and 37791 transitions. Word has length 36 [2021-06-12 22:20:34,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:34,013 INFO L482 AbstractCegarLoop]: Abstraction has 10697 states and 37791 transitions. [2021-06-12 22:20:34,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:34,014 INFO L276 IsEmpty]: Start isEmpty. Operand 10697 states and 37791 transitions. [2021-06-12 22:20:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:34,027 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:34,027 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:34,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-12 22:20:34,228 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:34,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:34,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1955379200, now seen corresponding path program 65 times [2021-06-12 22:20:34,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:34,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510055357] [2021-06-12 22:20:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:34,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:34,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510055357] [2021-06-12 22:20:34,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510055357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:34,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757073430] [2021-06-12 22:20:34,285 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 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 22:20:34,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:20:34,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:34,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:20:34,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:34,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757073430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:34,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:34,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 22:20:34,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106480723] [2021-06-12 22:20:34,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:20:34,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:34,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:20:34,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:20:34,559 INFO L87 Difference]: Start difference. First operand 10697 states and 37791 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:35,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:35,609 INFO L93 Difference]: Finished difference Result 28584 states and 95318 transitions. [2021-06-12 22:20:35,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:20:35,609 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:35,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:35,666 INFO L225 Difference]: With dead ends: 28584 [2021-06-12 22:20:35,666 INFO L226 Difference]: Without dead ends: 28584 [2021-06-12 22:20:35,667 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1334 ImplicationChecksByTransitivity, 606.7ms TimeCoverageRelationStatistics Valid=1025, Invalid=2757, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:20:35,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28584 states. [2021-06-12 22:20:36,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28584 to 11040. [2021-06-12 22:20:36,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11040 states, 11039 states have (on average 3.5667179998188243) internal successors, (39373), 11039 states have internal predecessors, (39373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:36,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11040 states to 11040 states and 39373 transitions. [2021-06-12 22:20:36,058 INFO L78 Accepts]: Start accepts. Automaton has 11040 states and 39373 transitions. Word has length 36 [2021-06-12 22:20:36,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:36,059 INFO L482 AbstractCegarLoop]: Abstraction has 11040 states and 39373 transitions. [2021-06-12 22:20:36,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:36,059 INFO L276 IsEmpty]: Start isEmpty. Operand 11040 states and 39373 transitions. [2021-06-12 22:20:36,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:36,075 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:36,075 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:36,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:36,276 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:36,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:36,276 INFO L82 PathProgramCache]: Analyzing trace with hash 835382162, now seen corresponding path program 66 times [2021-06-12 22:20:36,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:36,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006752780] [2021-06-12 22:20:36,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:36,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:36,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:36,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006752780] [2021-06-12 22:20:36,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006752780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:36,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799486337] [2021-06-12 22:20:36,326 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 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 22:20:36,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:20:36,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:36,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:20:36,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:36,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799486337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:36,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:36,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-12 22:20:36,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072448609] [2021-06-12 22:20:36,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:20:36,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:36,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:20:36,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:20:36,537 INFO L87 Difference]: Start difference. First operand 11040 states and 39373 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:38,893 INFO L93 Difference]: Finished difference Result 28065 states and 91868 transitions. [2021-06-12 22:20:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-12 22:20:38,893 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:38,953 INFO L225 Difference]: With dead ends: 28065 [2021-06-12 22:20:38,953 INFO L226 Difference]: Without dead ends: 28057 [2021-06-12 22:20:38,954 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4765 ImplicationChecksByTransitivity, 1436.5ms TimeCoverageRelationStatistics Valid=2261, Invalid=10171, Unknown=0, NotChecked=0, Total=12432 [2021-06-12 22:20:38,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28057 states. [2021-06-12 22:20:39,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28057 to 11031. [2021-06-12 22:20:39,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11031 states, 11030 states have (on average 3.565185856754306) internal successors, (39324), 11030 states have internal predecessors, (39324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11031 states to 11031 states and 39324 transitions. [2021-06-12 22:20:39,408 INFO L78 Accepts]: Start accepts. Automaton has 11031 states and 39324 transitions. Word has length 36 [2021-06-12 22:20:39,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:39,408 INFO L482 AbstractCegarLoop]: Abstraction has 11031 states and 39324 transitions. [2021-06-12 22:20:39,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:39,409 INFO L276 IsEmpty]: Start isEmpty. Operand 11031 states and 39324 transitions. [2021-06-12 22:20:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:39,424 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:39,424 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:39,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:39,625 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:39,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:39,625 INFO L82 PathProgramCache]: Analyzing trace with hash -645736056, now seen corresponding path program 67 times [2021-06-12 22:20:39,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:39,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355503404] [2021-06-12 22:20:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:39,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:39,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355503404] [2021-06-12 22:20:39,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355503404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:39,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407781919] [2021-06-12 22:20:39,681 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 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 22:20:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:39,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:20:39,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:39,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407781919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:39,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:39,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-12 22:20:39,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279407053] [2021-06-12 22:20:39,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:20:39,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:39,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:20:39,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:20:39,858 INFO L87 Difference]: Start difference. First operand 11031 states and 39324 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:41,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:41,224 INFO L93 Difference]: Finished difference Result 25852 states and 84621 transitions. [2021-06-12 22:20:41,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 22:20:41,225 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:41,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:41,272 INFO L225 Difference]: With dead ends: 25852 [2021-06-12 22:20:41,272 INFO L226 Difference]: Without dead ends: 25852 [2021-06-12 22:20:41,272 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 855.0ms TimeCoverageRelationStatistics Valid=1383, Invalid=4019, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 22:20:41,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25852 states. [2021-06-12 22:20:41,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25852 to 11109. [2021-06-12 22:20:41,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11109 states, 11108 states have (on average 3.5620273676629455) internal successors, (39567), 11108 states have internal predecessors, (39567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:41,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11109 states to 11109 states and 39567 transitions. [2021-06-12 22:20:41,695 INFO L78 Accepts]: Start accepts. Automaton has 11109 states and 39567 transitions. Word has length 36 [2021-06-12 22:20:41,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:41,695 INFO L482 AbstractCegarLoop]: Abstraction has 11109 states and 39567 transitions. [2021-06-12 22:20:41,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:41,695 INFO L276 IsEmpty]: Start isEmpty. Operand 11109 states and 39567 transitions. [2021-06-12 22:20:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:41,712 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:41,712 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:41,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:41,913 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:41,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:41,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1701113450, now seen corresponding path program 68 times [2021-06-12 22:20:41,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:41,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002135796] [2021-06-12 22:20:41,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:41,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:41,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002135796] [2021-06-12 22:20:41,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002135796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:41,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841470224] [2021-06-12 22:20:41,970 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 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 22:20:41,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:41,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:41,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:20:41,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:42,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841470224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:42,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:42,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 22:20:42,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439784455] [2021-06-12 22:20:42,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:20:42,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:42,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:20:42,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:20:42,174 INFO L87 Difference]: Start difference. First operand 11109 states and 39567 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:44,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:44,817 INFO L93 Difference]: Finished difference Result 26133 states and 85715 transitions. [2021-06-12 22:20:44,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-12 22:20:44,817 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:44,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:44,861 INFO L225 Difference]: With dead ends: 26133 [2021-06-12 22:20:44,862 INFO L226 Difference]: Without dead ends: 26125 [2021-06-12 22:20:44,863 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5792 ImplicationChecksByTransitivity, 1585.3ms TimeCoverageRelationStatistics Valid=2641, Invalid=12859, Unknown=0, NotChecked=0, Total=15500 [2021-06-12 22:20:44,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26125 states. [2021-06-12 22:20:45,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26125 to 10815. [2021-06-12 22:20:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10815 states, 10814 states have (on average 3.549935269095617) internal successors, (38389), 10814 states have internal predecessors, (38389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:45,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10815 states to 10815 states and 38389 transitions. [2021-06-12 22:20:45,238 INFO L78 Accepts]: Start accepts. Automaton has 10815 states and 38389 transitions. Word has length 36 [2021-06-12 22:20:45,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:45,238 INFO L482 AbstractCegarLoop]: Abstraction has 10815 states and 38389 transitions. [2021-06-12 22:20:45,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:45,238 INFO L276 IsEmpty]: Start isEmpty. Operand 10815 states and 38389 transitions. [2021-06-12 22:20:45,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:45,253 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:45,253 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:45,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-12 22:20:45,454 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:45,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:45,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1129408980, now seen corresponding path program 69 times [2021-06-12 22:20:45,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:45,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034782383] [2021-06-12 22:20:45,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:45,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:45,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034782383] [2021-06-12 22:20:45,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034782383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:45,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617471391] [2021-06-12 22:20:45,518 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 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 22:20:45,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 22:20:45,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:45,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:20:45,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:45,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617471391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:45,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:45,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-12 22:20:45,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764459118] [2021-06-12 22:20:45,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:20:45,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:45,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:20:45,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:20:45,668 INFO L87 Difference]: Start difference. First operand 10815 states and 38389 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:47,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:47,255 INFO L93 Difference]: Finished difference Result 25481 states and 83280 transitions. [2021-06-12 22:20:47,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-12 22:20:47,255 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:47,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:47,306 INFO L225 Difference]: With dead ends: 25481 [2021-06-12 22:20:47,306 INFO L226 Difference]: Without dead ends: 25421 [2021-06-12 22:20:47,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3412 ImplicationChecksByTransitivity, 1005.3ms TimeCoverageRelationStatistics Valid=1884, Invalid=7622, Unknown=0, NotChecked=0, Total=9506 [2021-06-12 22:20:47,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25421 states. [2021-06-12 22:20:47,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25421 to 10825. [2021-06-12 22:20:47,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10825 states, 10824 states have (on average 3.5495195861049518) internal successors, (38420), 10824 states have internal predecessors, (38420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10825 states to 10825 states and 38420 transitions. [2021-06-12 22:20:47,715 INFO L78 Accepts]: Start accepts. Automaton has 10825 states and 38420 transitions. Word has length 36 [2021-06-12 22:20:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:47,716 INFO L482 AbstractCegarLoop]: Abstraction has 10825 states and 38420 transitions. [2021-06-12 22:20:47,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 10825 states and 38420 transitions. [2021-06-12 22:20:47,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:47,730 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:47,731 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:47,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:47,932 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:47,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:47,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1944063276, now seen corresponding path program 70 times [2021-06-12 22:20:47,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:47,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959797507] [2021-06-12 22:20:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:47,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:47,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959797507] [2021-06-12 22:20:47,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959797507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:47,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821428052] [2021-06-12 22:20:47,981 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 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 22:20:48,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:20:48,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:48,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:20:48,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:48,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821428052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:48,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:48,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-12 22:20:48,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071532851] [2021-06-12 22:20:48,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:20:48,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:48,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:20:48,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:20:48,136 INFO L87 Difference]: Start difference. First operand 10825 states and 38420 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:49,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:49,328 INFO L93 Difference]: Finished difference Result 25553 states and 83090 transitions. [2021-06-12 22:20:49,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:20:49,329 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:49,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:49,375 INFO L225 Difference]: With dead ends: 25553 [2021-06-12 22:20:49,375 INFO L226 Difference]: Without dead ends: 25553 [2021-06-12 22:20:49,376 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 684.8ms TimeCoverageRelationStatistics Valid=1205, Invalid=3625, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:20:49,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25553 states. [2021-06-12 22:20:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25553 to 11156. [2021-06-12 22:20:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11156 states, 11155 states have (on average 3.528731510533393) internal successors, (39363), 11155 states have internal predecessors, (39363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:49,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11156 states to 11156 states and 39363 transitions. [2021-06-12 22:20:49,714 INFO L78 Accepts]: Start accepts. Automaton has 11156 states and 39363 transitions. Word has length 36 [2021-06-12 22:20:49,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:49,714 INFO L482 AbstractCegarLoop]: Abstraction has 11156 states and 39363 transitions. [2021-06-12 22:20:49,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:49,714 INFO L276 IsEmpty]: Start isEmpty. Operand 11156 states and 39363 transitions. [2021-06-12 22:20:49,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:49,729 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:49,729 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:49,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-12 22:20:49,930 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:49,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:49,930 INFO L82 PathProgramCache]: Analyzing trace with hash -417474388, now seen corresponding path program 71 times [2021-06-12 22:20:49,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:49,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881901646] [2021-06-12 22:20:49,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:50,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:50,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881901646] [2021-06-12 22:20:50,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881901646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:50,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525786495] [2021-06-12 22:20:50,010 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 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 22:20:50,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 22:20:50,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:50,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:20:50,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:50,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525786495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:50,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:50,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 22:20:50,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739882664] [2021-06-12 22:20:50,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:20:50,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:50,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:20:50,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:20:50,280 INFO L87 Difference]: Start difference. First operand 11156 states and 39363 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:52,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:52,041 INFO L93 Difference]: Finished difference Result 24060 states and 79445 transitions. [2021-06-12 22:20:52,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-12 22:20:52,042 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:52,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:52,084 INFO L225 Difference]: With dead ends: 24060 [2021-06-12 22:20:52,084 INFO L226 Difference]: Without dead ends: 23988 [2021-06-12 22:20:52,085 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3341 ImplicationChecksByTransitivity, 1119.7ms TimeCoverageRelationStatistics Valid=1989, Invalid=7323, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 22:20:52,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23988 states. [2021-06-12 22:20:52,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23988 to 11635. [2021-06-12 22:20:52,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11635 states, 11634 states have (on average 3.5373044524669073) internal successors, (41153), 11634 states have internal predecessors, (41153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 41153 transitions. [2021-06-12 22:20:52,414 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 41153 transitions. Word has length 36 [2021-06-12 22:20:52,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:52,414 INFO L482 AbstractCegarLoop]: Abstraction has 11635 states and 41153 transitions. [2021-06-12 22:20:52,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:52,414 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 41153 transitions. [2021-06-12 22:20:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:52,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:52,431 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:52,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:52,631 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:52,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:52,631 INFO L82 PathProgramCache]: Analyzing trace with hash -56872508, now seen corresponding path program 72 times [2021-06-12 22:20:52,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:52,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117222099] [2021-06-12 22:20:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:52,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:52,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117222099] [2021-06-12 22:20:52,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117222099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:52,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552311186] [2021-06-12 22:20:52,676 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 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 22:20:52,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:20:52,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:52,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:20:52,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:52,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552311186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:52,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:52,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-12 22:20:52,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215572417] [2021-06-12 22:20:52,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:20:52,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:52,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:20:52,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:20:52,929 INFO L87 Difference]: Start difference. First operand 11635 states and 41153 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:55,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:55,520 INFO L93 Difference]: Finished difference Result 32188 states and 105890 transitions. [2021-06-12 22:20:55,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-06-12 22:20:55,520 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:55,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:55,574 INFO L225 Difference]: With dead ends: 32188 [2021-06-12 22:20:55,574 INFO L226 Difference]: Without dead ends: 32188 [2021-06-12 22:20:55,576 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7629 ImplicationChecksByTransitivity, 1765.7ms TimeCoverageRelationStatistics Valid=3449, Invalid=15183, Unknown=0, NotChecked=0, Total=18632 [2021-06-12 22:20:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32188 states. [2021-06-12 22:20:55,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32188 to 11859. [2021-06-12 22:20:55,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11859 states, 11858 states have (on average 3.5428402766065106) internal successors, (42011), 11858 states have internal predecessors, (42011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:56,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11859 states to 11859 states and 42011 transitions. [2021-06-12 22:20:56,006 INFO L78 Accepts]: Start accepts. Automaton has 11859 states and 42011 transitions. Word has length 36 [2021-06-12 22:20:56,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:56,006 INFO L482 AbstractCegarLoop]: Abstraction has 11859 states and 42011 transitions. [2021-06-12 22:20:56,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:56,006 INFO L276 IsEmpty]: Start isEmpty. Operand 11859 states and 42011 transitions. [2021-06-12 22:20:56,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:56,022 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:56,022 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:56,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:56,223 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:56,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:56,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1328456694, now seen corresponding path program 73 times [2021-06-12 22:20:56,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:56,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320867867] [2021-06-12 22:20:56,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:56,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:56,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320867867] [2021-06-12 22:20:56,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320867867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:56,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832086364] [2021-06-12 22:20:56,289 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 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 22:20:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:56,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:20:56,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:56,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832086364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:56,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:56,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-12 22:20:56,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566685962] [2021-06-12 22:20:56,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:20:56,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:56,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:20:56,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:20:56,464 INFO L87 Difference]: Start difference. First operand 11859 states and 42011 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:57,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:57,390 INFO L93 Difference]: Finished difference Result 21337 states and 71691 transitions. [2021-06-12 22:20:57,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:20:57,391 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:20:57,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:57,447 INFO L225 Difference]: With dead ends: 21337 [2021-06-12 22:20:57,447 INFO L226 Difference]: Without dead ends: 21337 [2021-06-12 22:20:57,448 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 493.8ms TimeCoverageRelationStatistics Valid=705, Invalid=2375, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 22:20:57,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21337 states. [2021-06-12 22:20:57,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21337 to 12014. [2021-06-12 22:20:57,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12014 states, 12013 states have (on average 3.539082660451178) internal successors, (42515), 12013 states have internal predecessors, (42515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:57,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12014 states to 12014 states and 42515 transitions. [2021-06-12 22:20:57,760 INFO L78 Accepts]: Start accepts. Automaton has 12014 states and 42515 transitions. Word has length 36 [2021-06-12 22:20:57,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:57,760 INFO L482 AbstractCegarLoop]: Abstraction has 12014 states and 42515 transitions. [2021-06-12 22:20:57,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:57,760 INFO L276 IsEmpty]: Start isEmpty. Operand 12014 states and 42515 transitions. [2021-06-12 22:20:57,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:20:57,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:57,777 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:57,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-12 22:20:57,977 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:57,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:57,978 INFO L82 PathProgramCache]: Analyzing trace with hash -757061290, now seen corresponding path program 74 times [2021-06-12 22:20:57,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:57,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253091444] [2021-06-12 22:20:57,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:58,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:58,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253091444] [2021-06-12 22:20:58,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253091444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:58,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568352795] [2021-06-12 22:20:58,030 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 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 22:20:58,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:58,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:58,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:20:58,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:20:58,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568352795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:58,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:58,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-12 22:20:58,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820657070] [2021-06-12 22:20:58,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:20:58,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:58,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:20:58,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:20:58,206 INFO L87 Difference]: Start difference. First operand 12014 states and 42515 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:00,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:00,046 INFO L93 Difference]: Finished difference Result 23584 states and 78972 transitions. [2021-06-12 22:21:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-12 22:21:00,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:00,091 INFO L225 Difference]: With dead ends: 23584 [2021-06-12 22:21:00,091 INFO L226 Difference]: Without dead ends: 23568 [2021-06-12 22:21:00,092 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4149 ImplicationChecksByTransitivity, 1175.0ms TimeCoverageRelationStatistics Valid=2031, Invalid=9311, Unknown=0, NotChecked=0, Total=11342 [2021-06-12 22:21:00,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23568 states. [2021-06-12 22:21:00,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23568 to 12014. [2021-06-12 22:21:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12014 states, 12013 states have (on average 3.5387496878381755) internal successors, (42511), 12013 states have internal predecessors, (42511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12014 states to 12014 states and 42511 transitions. [2021-06-12 22:21:00,426 INFO L78 Accepts]: Start accepts. Automaton has 12014 states and 42511 transitions. Word has length 36 [2021-06-12 22:21:00,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:00,426 INFO L482 AbstractCegarLoop]: Abstraction has 12014 states and 42511 transitions. [2021-06-12 22:21:00,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:00,426 INFO L276 IsEmpty]: Start isEmpty. Operand 12014 states and 42511 transitions. [2021-06-12 22:21:00,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:00,442 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:00,442 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:00,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:00,644 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:00,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:00,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1893700292, now seen corresponding path program 24 times [2021-06-12 22:21:00,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:00,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524450146] [2021-06-12 22:21:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:21:00,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:00,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524450146] [2021-06-12 22:21:00,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524450146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:00,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897338721] [2021-06-12 22:21:00,703 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 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 22:21:00,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:21:00,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:00,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:21:00,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:21:00,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897338721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:00,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:00,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 22:21:00,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595167852] [2021-06-12 22:21:00,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:00,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:00,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:00,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:00,883 INFO L87 Difference]: Start difference. First operand 12014 states and 42511 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:04,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:04,800 INFO L93 Difference]: Finished difference Result 24185 states and 80281 transitions. [2021-06-12 22:21:04,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2021-06-12 22:21:04,800 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:04,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:04,841 INFO L225 Difference]: With dead ends: 24185 [2021-06-12 22:21:04,841 INFO L226 Difference]: Without dead ends: 24161 [2021-06-12 22:21:04,844 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15417 ImplicationChecksByTransitivity, 2856.5ms TimeCoverageRelationStatistics Valid=5544, Invalid=31128, Unknown=0, NotChecked=0, Total=36672 [2021-06-12 22:21:04,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24161 states. [2021-06-12 22:21:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24161 to 12318. [2021-06-12 22:21:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12318 states, 12317 states have (on average 3.522935779816514) internal successors, (43392), 12317 states have internal predecessors, (43392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:05,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12318 states to 12318 states and 43392 transitions. [2021-06-12 22:21:05,211 INFO L78 Accepts]: Start accepts. Automaton has 12318 states and 43392 transitions. Word has length 36 [2021-06-12 22:21:05,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:05,211 INFO L482 AbstractCegarLoop]: Abstraction has 12318 states and 43392 transitions. [2021-06-12 22:21:05,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:05,212 INFO L276 IsEmpty]: Start isEmpty. Operand 12318 states and 43392 transitions. [2021-06-12 22:21:05,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:05,229 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:05,229 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:05,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:05,445 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:05,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:05,445 INFO L82 PathProgramCache]: Analyzing trace with hash 14650632, now seen corresponding path program 75 times [2021-06-12 22:21:05,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:05,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418922395] [2021-06-12 22:21:05,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:05,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:05,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418922395] [2021-06-12 22:21:05,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418922395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:05,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425980595] [2021-06-12 22:21:05,502 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 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 22:21:05,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 22:21:05,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:05,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:21:05,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:05,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425980595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:05,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:05,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-12 22:21:05,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956080817] [2021-06-12 22:21:05,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:21:05,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:05,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:21:05,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:21:05,670 INFO L87 Difference]: Start difference. First operand 12318 states and 43392 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:06,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:06,774 INFO L93 Difference]: Finished difference Result 30224 states and 99175 transitions. [2021-06-12 22:21:06,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:21:06,775 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:06,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:06,832 INFO L225 Difference]: With dead ends: 30224 [2021-06-12 22:21:06,832 INFO L226 Difference]: Without dead ends: 30224 [2021-06-12 22:21:06,833 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 650.0ms TimeCoverageRelationStatistics Valid=959, Invalid=2701, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:21:06,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30224 states. [2021-06-12 22:21:07,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30224 to 13376. [2021-06-12 22:21:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13376 states, 13375 states have (on average 3.5404859813084113) internal successors, (47354), 13375 states have internal predecessors, (47354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:07,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13376 states to 13376 states and 47354 transitions. [2021-06-12 22:21:07,313 INFO L78 Accepts]: Start accepts. Automaton has 13376 states and 47354 transitions. Word has length 36 [2021-06-12 22:21:07,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:07,313 INFO L482 AbstractCegarLoop]: Abstraction has 13376 states and 47354 transitions. [2021-06-12 22:21:07,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand 13376 states and 47354 transitions. [2021-06-12 22:21:07,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:07,332 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:07,332 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:07,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-12 22:21:07,533 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:07,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1040726762, now seen corresponding path program 76 times [2021-06-12 22:21:07,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:07,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971218954] [2021-06-12 22:21:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:07,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:07,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971218954] [2021-06-12 22:21:07,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971218954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:07,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244938078] [2021-06-12 22:21:07,598 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 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 22:21:07,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:21:07,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:07,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:21:07,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:21:07,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244938078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:07,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:07,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-12 22:21:07,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966310045] [2021-06-12 22:21:07,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:21:07,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:07,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:21:07,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:21:07,783 INFO L87 Difference]: Start difference. First operand 13376 states and 47354 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:10,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:10,452 INFO L93 Difference]: Finished difference Result 31957 states and 103754 transitions. [2021-06-12 22:21:10,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-06-12 22:21:10,452 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:10,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:10,518 INFO L225 Difference]: With dead ends: 31957 [2021-06-12 22:21:10,518 INFO L226 Difference]: Without dead ends: 31941 [2021-06-12 22:21:10,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7670 ImplicationChecksByTransitivity, 1868.4ms TimeCoverageRelationStatistics Valid=3631, Invalid=15551, Unknown=0, NotChecked=0, Total=19182 [2021-06-12 22:21:10,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31941 states. [2021-06-12 22:21:11,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31941 to 12804. [2021-06-12 22:21:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12804 states, 12803 states have (on average 3.5590096071233304) internal successors, (45566), 12803 states have internal predecessors, (45566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:11,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12804 states to 12804 states and 45566 transitions. [2021-06-12 22:21:11,049 INFO L78 Accepts]: Start accepts. Automaton has 12804 states and 45566 transitions. Word has length 36 [2021-06-12 22:21:11,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:11,049 INFO L482 AbstractCegarLoop]: Abstraction has 12804 states and 45566 transitions. [2021-06-12 22:21:11,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:11,050 INFO L276 IsEmpty]: Start isEmpty. Operand 12804 states and 45566 transitions. [2021-06-12 22:21:11,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:11,069 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:11,069 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:11,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-12 22:21:11,270 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:11,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:11,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1670020454, now seen corresponding path program 77 times [2021-06-12 22:21:11,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:11,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407869982] [2021-06-12 22:21:11,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:11,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:11,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407869982] [2021-06-12 22:21:11,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407869982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:11,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319032867] [2021-06-12 22:21:11,329 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 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 22:21:11,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 22:21:11,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:11,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:21:11,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:21:11,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319032867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:11,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:11,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 22:21:11,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392859846] [2021-06-12 22:21:11,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:21:11,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:11,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:21:11,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:21:11,478 INFO L87 Difference]: Start difference. First operand 12804 states and 45566 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:13,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:13,409 INFO L93 Difference]: Finished difference Result 29035 states and 95366 transitions. [2021-06-12 22:21:13,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-12 22:21:13,410 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:13,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:13,461 INFO L225 Difference]: With dead ends: 29035 [2021-06-12 22:21:13,461 INFO L226 Difference]: Without dead ends: 28951 [2021-06-12 22:21:13,462 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4298 ImplicationChecksByTransitivity, 1257.6ms TimeCoverageRelationStatistics Valid=2386, Invalid=8956, Unknown=0, NotChecked=0, Total=11342 [2021-06-12 22:21:13,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28951 states. [2021-06-12 22:21:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28951 to 12660. [2021-06-12 22:21:13,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12660 states, 12659 states have (on average 3.5663164546962633) internal successors, (45146), 12659 states have internal predecessors, (45146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:13,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12660 states to 12660 states and 45146 transitions. [2021-06-12 22:21:13,911 INFO L78 Accepts]: Start accepts. Automaton has 12660 states and 45146 transitions. Word has length 36 [2021-06-12 22:21:13,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:13,911 INFO L482 AbstractCegarLoop]: Abstraction has 12660 states and 45146 transitions. [2021-06-12 22:21:13,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:13,911 INFO L276 IsEmpty]: Start isEmpty. Operand 12660 states and 45146 transitions. [2021-06-12 22:21:13,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:13,929 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:13,929 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:14,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-12 22:21:14,131 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:14,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:14,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1988479988, now seen corresponding path program 78 times [2021-06-12 22:21:14,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:14,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546724112] [2021-06-12 22:21:14,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:14,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:14,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546724112] [2021-06-12 22:21:14,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546724112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:14,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857819315] [2021-06-12 22:21:14,188 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 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 22:21:14,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 22:21:14,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:14,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 22:21:14,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:14,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-12 22:21:14,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:14,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:14,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:14,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-06-12 22:21:14,418 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-06-12 22:21:14,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-12 22:21:14,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:14,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:14,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:14,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-12 22:21:14,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:21:14,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:21:14,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:21:14,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-06-12 22:21:14,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:14,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:14,498 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 1 xjuncts. [2021-06-12 22:21:14,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-12 22:21:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 22:21:14,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857819315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:14,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:14,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-12 22:21:14,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130602618] [2021-06-12 22:21:14,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 22:21:14,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:14,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 22:21:14,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:21:14,615 INFO L87 Difference]: Start difference. First operand 12660 states and 45146 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:18,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:18,674 INFO L93 Difference]: Finished difference Result 27292 states and 89638 transitions. [2021-06-12 22:21:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-06-12 22:21:18,674 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:18,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:18,721 INFO L225 Difference]: With dead ends: 27292 [2021-06-12 22:21:18,721 INFO L226 Difference]: Without dead ends: 27101 [2021-06-12 22:21:18,723 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10096 ImplicationChecksByTransitivity, 2989.7ms TimeCoverageRelationStatistics Valid=3156, Invalid=22604, Unknown=0, NotChecked=0, Total=25760 [2021-06-12 22:21:18,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27101 states. [2021-06-12 22:21:19,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27101 to 12693. [2021-06-12 22:21:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12693 states, 12692 states have (on average 3.567601638827608) internal successors, (45280), 12692 states have internal predecessors, (45280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:19,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12693 states to 12693 states and 45280 transitions. [2021-06-12 22:21:19,053 INFO L78 Accepts]: Start accepts. Automaton has 12693 states and 45280 transitions. Word has length 36 [2021-06-12 22:21:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:19,054 INFO L482 AbstractCegarLoop]: Abstraction has 12693 states and 45280 transitions. [2021-06-12 22:21:19,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 12693 states and 45280 transitions. [2021-06-12 22:21:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:19,072 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:19,072 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:19,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-12 22:21:19,273 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:19,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:19,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1792794872, now seen corresponding path program 79 times [2021-06-12 22:21:19,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:19,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233113652] [2021-06-12 22:21:19,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:21:19,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:19,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233113652] [2021-06-12 22:21:19,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233113652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:19,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949324446] [2021-06-12 22:21:19,315 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 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 22:21:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:19,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:21:19,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:19,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949324446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:19,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:19,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 22:21:19,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235611784] [2021-06-12 22:21:19,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:21:19,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:19,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:21:19,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:21:19,471 INFO L87 Difference]: Start difference. First operand 12693 states and 45280 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:20,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:20,268 INFO L93 Difference]: Finished difference Result 30802 states and 102946 transitions. [2021-06-12 22:21:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:21:20,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:20,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:20,334 INFO L225 Difference]: With dead ends: 30802 [2021-06-12 22:21:20,335 INFO L226 Difference]: Without dead ends: 30802 [2021-06-12 22:21:20,335 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 395.1ms TimeCoverageRelationStatistics Valid=588, Invalid=1574, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:21:20,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30802 states. [2021-06-12 22:21:20,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30802 to 12697. [2021-06-12 22:21:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12697 states, 12696 states have (on average 3.5682104599873976) internal successors, (45302), 12696 states have internal predecessors, (45302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:20,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12697 states to 12697 states and 45302 transitions. [2021-06-12 22:21:20,809 INFO L78 Accepts]: Start accepts. Automaton has 12697 states and 45302 transitions. Word has length 36 [2021-06-12 22:21:20,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:20,810 INFO L482 AbstractCegarLoop]: Abstraction has 12697 states and 45302 transitions. [2021-06-12 22:21:20,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:20,810 INFO L276 IsEmpty]: Start isEmpty. Operand 12697 states and 45302 transitions. [2021-06-12 22:21:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:20,828 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:20,828 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:21,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-12 22:21:21,029 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:21,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:21,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1230140076, now seen corresponding path program 80 times [2021-06-12 22:21:21,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:21,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958926217] [2021-06-12 22:21:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:21,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:21,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958926217] [2021-06-12 22:21:21,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958926217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:21,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615783906] [2021-06-12 22:21:21,079 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 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 22:21:21,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:21,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:21,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:21:21,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:21:21,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615783906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:21,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:21,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:21:21,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968177035] [2021-06-12 22:21:21,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:21:21,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:21,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:21:21,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:21:21,235 INFO L87 Difference]: Start difference. First operand 12697 states and 45302 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:24,452 INFO L93 Difference]: Finished difference Result 33049 states and 107981 transitions. [2021-06-12 22:21:24,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-06-12 22:21:24,452 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:24,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:24,512 INFO L225 Difference]: With dead ends: 33049 [2021-06-12 22:21:24,512 INFO L226 Difference]: Without dead ends: 32977 [2021-06-12 22:21:24,513 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11512 ImplicationChecksByTransitivity, 2220.6ms TimeCoverageRelationStatistics Valid=4716, Invalid=23006, Unknown=0, NotChecked=0, Total=27722 [2021-06-12 22:21:24,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32977 states. [2021-06-12 22:21:24,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32977 to 12738. [2021-06-12 22:21:24,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12738 states, 12737 states have (on average 3.5727408337913165) internal successors, (45506), 12737 states have internal predecessors, (45506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12738 states to 12738 states and 45506 transitions. [2021-06-12 22:21:24,917 INFO L78 Accepts]: Start accepts. Automaton has 12738 states and 45506 transitions. Word has length 36 [2021-06-12 22:21:24,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:24,917 INFO L482 AbstractCegarLoop]: Abstraction has 12738 states and 45506 transitions. [2021-06-12 22:21:24,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:24,917 INFO L276 IsEmpty]: Start isEmpty. Operand 12738 states and 45506 transitions. [2021-06-12 22:21:24,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:24,938 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:24,938 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:25,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-12 22:21:25,139 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:25,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:25,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2017838672, now seen corresponding path program 81 times [2021-06-12 22:21:25,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:25,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52640615] [2021-06-12 22:21:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:25,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:25,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52640615] [2021-06-12 22:21:25,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52640615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:25,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870756367] [2021-06-12 22:21:25,206 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 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 22:21:25,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 22:21:25,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:25,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:21:25,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:25,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870756367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:25,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:25,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-12 22:21:25,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118006066] [2021-06-12 22:21:25,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:21:25,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:25,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:21:25,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:21:25,363 INFO L87 Difference]: Start difference. First operand 12738 states and 45506 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:26,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:26,806 INFO L93 Difference]: Finished difference Result 28529 states and 93962 transitions. [2021-06-12 22:21:26,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-12 22:21:26,807 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:26,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:26,860 INFO L225 Difference]: With dead ends: 28529 [2021-06-12 22:21:26,861 INFO L226 Difference]: Without dead ends: 28385 [2021-06-12 22:21:26,861 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2641 ImplicationChecksByTransitivity, 895.9ms TimeCoverageRelationStatistics Valid=1478, Invalid=6004, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 22:21:26,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28385 states. [2021-06-12 22:21:27,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28385 to 12796. [2021-06-12 22:21:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12796 states, 12795 states have (on average 3.569753810082063) internal successors, (45675), 12795 states have internal predecessors, (45675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:27,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12796 states to 12796 states and 45675 transitions. [2021-06-12 22:21:27,304 INFO L78 Accepts]: Start accepts. Automaton has 12796 states and 45675 transitions. Word has length 36 [2021-06-12 22:21:27,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:27,304 INFO L482 AbstractCegarLoop]: Abstraction has 12796 states and 45675 transitions. [2021-06-12 22:21:27,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:27,305 INFO L276 IsEmpty]: Start isEmpty. Operand 12796 states and 45675 transitions. [2021-06-12 22:21:27,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:27,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:27,324 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:27,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-12 22:21:27,524 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:27,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:27,525 INFO L82 PathProgramCache]: Analyzing trace with hash -545537740, now seen corresponding path program 82 times [2021-06-12 22:21:27,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:27,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036013562] [2021-06-12 22:21:27,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:27,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:27,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036013562] [2021-06-12 22:21:27,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036013562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:27,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024118967] [2021-06-12 22:21:27,580 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 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 22:21:27,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:21:27,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:27,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:21:27,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:21:27,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024118967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:27,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:27,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-12 22:21:27,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121556918] [2021-06-12 22:21:27,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:21:27,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:27,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:21:27,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:21:27,724 INFO L87 Difference]: Start difference. First operand 12796 states and 45675 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:29,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:29,745 INFO L93 Difference]: Finished difference Result 30495 states and 99403 transitions. [2021-06-12 22:21:29,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-12 22:21:29,745 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:29,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:29,804 INFO L225 Difference]: With dead ends: 30495 [2021-06-12 22:21:29,804 INFO L226 Difference]: Without dead ends: 30483 [2021-06-12 22:21:29,805 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5685 ImplicationChecksByTransitivity, 1289.4ms TimeCoverageRelationStatistics Valid=2727, Invalid=11315, Unknown=0, NotChecked=0, Total=14042 [2021-06-12 22:21:29,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30483 states. [2021-06-12 22:21:30,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30483 to 11108. [2021-06-12 22:21:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11108 states, 11107 states have (on average 3.466822724408031) internal successors, (38506), 11107 states have internal predecessors, (38506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11108 states to 11108 states and 38506 transitions. [2021-06-12 22:21:30,238 INFO L78 Accepts]: Start accepts. Automaton has 11108 states and 38506 transitions. Word has length 36 [2021-06-12 22:21:30,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:30,238 INFO L482 AbstractCegarLoop]: Abstraction has 11108 states and 38506 transitions. [2021-06-12 22:21:30,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 11108 states and 38506 transitions. [2021-06-12 22:21:30,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:30,252 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:30,253 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:30,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:30,453 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:30,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:30,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1920078252, now seen corresponding path program 83 times [2021-06-12 22:21:30,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:30,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419710441] [2021-06-12 22:21:30,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:30,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:30,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419710441] [2021-06-12 22:21:30,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419710441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:30,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335597465] [2021-06-12 22:21:30,510 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 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 22:21:30,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 22:21:30,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:30,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:21:30,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:21:30,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335597465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:30,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:30,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-12 22:21:30,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744804614] [2021-06-12 22:21:30,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:21:30,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:30,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:21:30,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:21:30,680 INFO L87 Difference]: Start difference. First operand 11108 states and 38506 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:32,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:32,485 INFO L93 Difference]: Finished difference Result 23782 states and 78083 transitions. [2021-06-12 22:21:32,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-12 22:21:32,485 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:32,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:32,524 INFO L225 Difference]: With dead ends: 23782 [2021-06-12 22:21:32,524 INFO L226 Difference]: Without dead ends: 23782 [2021-06-12 22:21:32,525 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4543 ImplicationChecksByTransitivity, 1267.9ms TimeCoverageRelationStatistics Valid=2343, Invalid=8999, Unknown=0, NotChecked=0, Total=11342 [2021-06-12 22:21:32,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23782 states. [2021-06-12 22:21:32,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23782 to 11414. [2021-06-12 22:21:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11414 states, 11413 states have (on average 3.453517918163498) internal successors, (39415), 11413 states have internal predecessors, (39415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11414 states to 11414 states and 39415 transitions. [2021-06-12 22:21:32,799 INFO L78 Accepts]: Start accepts. Automaton has 11414 states and 39415 transitions. Word has length 36 [2021-06-12 22:21:32,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:32,799 INFO L482 AbstractCegarLoop]: Abstraction has 11414 states and 39415 transitions. [2021-06-12 22:21:32,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:32,799 INFO L276 IsEmpty]: Start isEmpty. Operand 11414 states and 39415 transitions. [2021-06-12 22:21:32,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:32,815 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:32,815 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:33,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:33,016 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:33,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:33,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1278156332, now seen corresponding path program 84 times [2021-06-12 22:21:33,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:33,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403452768] [2021-06-12 22:21:33,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:33,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:33,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403452768] [2021-06-12 22:21:33,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403452768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:33,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843154219] [2021-06-12 22:21:33,073 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 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 22:21:33,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 22:21:33,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:33,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 22:21:33,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:33,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-12 22:21:33,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:33,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:33,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:33,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-06-12 22:21:33,325 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-06-12 22:21:33,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-12 22:21:33,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:33,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:33,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:33,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-12 22:21:33,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:21:33,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:21:33,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:21:33,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-06-12 22:21:33,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:33,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:33,404 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 1 xjuncts. [2021-06-12 22:21:33,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-12 22:21:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 22:21:33,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843154219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:33,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:33,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-12 22:21:33,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528612311] [2021-06-12 22:21:33,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 22:21:33,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:33,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 22:21:33,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:21:33,573 INFO L87 Difference]: Start difference. First operand 11414 states and 39415 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:38,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:38,556 INFO L93 Difference]: Finished difference Result 23675 states and 76434 transitions. [2021-06-12 22:21:38,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-12 22:21:38,556 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:38,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:38,593 INFO L225 Difference]: With dead ends: 23675 [2021-06-12 22:21:38,593 INFO L226 Difference]: Without dead ends: 23445 [2021-06-12 22:21:38,594 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12718 ImplicationChecksByTransitivity, 3604.4ms TimeCoverageRelationStatistics Valid=3502, Invalid=29078, Unknown=0, NotChecked=0, Total=32580 [2021-06-12 22:21:38,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23445 states. [2021-06-12 22:21:38,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23445 to 11648. [2021-06-12 22:21:38,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11648 states, 11647 states have (on average 3.4537649180046364) internal successors, (40226), 11647 states have internal predecessors, (40226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:38,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11648 states to 11648 states and 40226 transitions. [2021-06-12 22:21:38,864 INFO L78 Accepts]: Start accepts. Automaton has 11648 states and 40226 transitions. Word has length 36 [2021-06-12 22:21:38,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:38,864 INFO L482 AbstractCegarLoop]: Abstraction has 11648 states and 40226 transitions. [2021-06-12 22:21:38,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:38,864 INFO L276 IsEmpty]: Start isEmpty. Operand 11648 states and 40226 transitions. [2021-06-12 22:21:38,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:38,879 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:38,879 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:39,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:39,085 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:39,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:39,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1851612882, now seen corresponding path program 85 times [2021-06-12 22:21:39,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:39,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930650945] [2021-06-12 22:21:39,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:21:39,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:39,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930650945] [2021-06-12 22:21:39,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930650945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:39,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281209357] [2021-06-12 22:21:39,150 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 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 22:21:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:39,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:21:39,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 22:21:39,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281209357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:39,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:39,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:21:39,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111131920] [2021-06-12 22:21:39,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:21:39,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:39,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:21:39,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:21:39,329 INFO L87 Difference]: Start difference. First operand 11648 states and 40226 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:40,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:40,546 INFO L93 Difference]: Finished difference Result 21100 states and 70299 transitions. [2021-06-12 22:21:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-12 22:21:40,547 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:40,582 INFO L225 Difference]: With dead ends: 21100 [2021-06-12 22:21:40,582 INFO L226 Difference]: Without dead ends: 21088 [2021-06-12 22:21:40,582 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 776.8ms TimeCoverageRelationStatistics Valid=1148, Invalid=4858, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 22:21:40,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21088 states. [2021-06-12 22:21:40,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21088 to 11913. [2021-06-12 22:21:40,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11913 states, 11912 states have (on average 3.4548354600402953) internal successors, (41154), 11912 states have internal predecessors, (41154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11913 states to 11913 states and 41154 transitions. [2021-06-12 22:21:40,957 INFO L78 Accepts]: Start accepts. Automaton has 11913 states and 41154 transitions. Word has length 36 [2021-06-12 22:21:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:40,957 INFO L482 AbstractCegarLoop]: Abstraction has 11913 states and 41154 transitions. [2021-06-12 22:21:40,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 11913 states and 41154 transitions. [2021-06-12 22:21:40,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:40,972 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:40,972 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:41,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:41,173 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:41,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:41,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1819802944, now seen corresponding path program 25 times [2021-06-12 22:21:41,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:41,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026207427] [2021-06-12 22:21:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 22:21:41,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:41,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026207427] [2021-06-12 22:21:41,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026207427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:41,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123930762] [2021-06-12 22:21:41,224 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 22:21:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:41,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:21:41,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:41,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123930762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:41,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:41,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-12 22:21:41,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732108810] [2021-06-12 22:21:41,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:21:41,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:41,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:21:41,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:21:41,449 INFO L87 Difference]: Start difference. First operand 11913 states and 41154 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:42,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:42,577 INFO L93 Difference]: Finished difference Result 29397 states and 97752 transitions. [2021-06-12 22:21:42,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:21:42,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:42,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:42,633 INFO L225 Difference]: With dead ends: 29397 [2021-06-12 22:21:42,633 INFO L226 Difference]: Without dead ends: 29397 [2021-06-12 22:21:42,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 679.7ms TimeCoverageRelationStatistics Valid=957, Invalid=2583, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:21:42,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29397 states. [2021-06-12 22:21:42,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29397 to 12618. [2021-06-12 22:21:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12618 states, 12617 states have (on average 3.513672029801062) internal successors, (44332), 12617 states have internal predecessors, (44332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12618 states to 12618 states and 44332 transitions. [2021-06-12 22:21:42,990 INFO L78 Accepts]: Start accepts. Automaton has 12618 states and 44332 transitions. Word has length 36 [2021-06-12 22:21:42,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:42,990 INFO L482 AbstractCegarLoop]: Abstraction has 12618 states and 44332 transitions. [2021-06-12 22:21:42,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:42,990 INFO L276 IsEmpty]: Start isEmpty. Operand 12618 states and 44332 transitions. [2021-06-12 22:21:43,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:43,005 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:43,005 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:43,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-12 22:21:43,206 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:43,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:43,206 INFO L82 PathProgramCache]: Analyzing trace with hash 512328654, now seen corresponding path program 26 times [2021-06-12 22:21:43,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:43,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544894941] [2021-06-12 22:21:43,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:21:43,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:43,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544894941] [2021-06-12 22:21:43,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544894941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:43,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874542475] [2021-06-12 22:21:43,251 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 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 22:21:43,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:43,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:43,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:21:43,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:43,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874542475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:43,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:43,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 18 [2021-06-12 22:21:43,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878974371] [2021-06-12 22:21:43,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:21:43,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:43,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:21:43,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:21:43,411 INFO L87 Difference]: Start difference. First operand 12618 states and 44332 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:44,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:44,415 INFO L93 Difference]: Finished difference Result 27598 states and 91849 transitions. [2021-06-12 22:21:44,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:21:44,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:44,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:44,464 INFO L225 Difference]: With dead ends: 27598 [2021-06-12 22:21:44,464 INFO L226 Difference]: Without dead ends: 27598 [2021-06-12 22:21:44,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 574.2ms TimeCoverageRelationStatistics Valid=833, Invalid=2359, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:21:44,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27598 states. [2021-06-12 22:21:44,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27598 to 12630. [2021-06-12 22:21:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12630 states, 12629 states have (on average 3.5136590387204056) internal successors, (44374), 12629 states have internal predecessors, (44374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12630 states to 12630 states and 44374 transitions. [2021-06-12 22:21:44,786 INFO L78 Accepts]: Start accepts. Automaton has 12630 states and 44374 transitions. Word has length 36 [2021-06-12 22:21:44,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:44,786 INFO L482 AbstractCegarLoop]: Abstraction has 12630 states and 44374 transitions. [2021-06-12 22:21:44,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:44,786 INFO L276 IsEmpty]: Start isEmpty. Operand 12630 states and 44374 transitions. [2021-06-12 22:21:44,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:44,802 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:44,802 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:45,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 22:21:45,002 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:45,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:45,002 INFO L82 PathProgramCache]: Analyzing trace with hash -2051604804, now seen corresponding path program 27 times [2021-06-12 22:21:45,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:45,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654483854] [2021-06-12 22:21:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:21:45,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:45,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654483854] [2021-06-12 22:21:45,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654483854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:45,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098732524] [2021-06-12 22:21:45,044 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 22:21:45,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 22:21:45,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:45,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:21:45,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:45,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098732524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:45,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:45,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 18 [2021-06-12 22:21:45,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488966671] [2021-06-12 22:21:45,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:21:45,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:45,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:21:45,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:21:45,202 INFO L87 Difference]: Start difference. First operand 12630 states and 44374 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:46,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:46,197 INFO L93 Difference]: Finished difference Result 27112 states and 90425 transitions. [2021-06-12 22:21:46,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:21:46,197 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:46,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:46,254 INFO L225 Difference]: With dead ends: 27112 [2021-06-12 22:21:46,254 INFO L226 Difference]: Without dead ends: 27108 [2021-06-12 22:21:46,254 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=708, Invalid=2048, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 22:21:46,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27108 states. [2021-06-12 22:21:46,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27108 to 12826. [2021-06-12 22:21:46,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12826 states, 12825 states have (on average 3.504093567251462) internal successors, (44940), 12825 states have internal predecessors, (44940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:46,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12826 states to 12826 states and 44940 transitions. [2021-06-12 22:21:46,716 INFO L78 Accepts]: Start accepts. Automaton has 12826 states and 44940 transitions. Word has length 36 [2021-06-12 22:21:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:46,716 INFO L482 AbstractCegarLoop]: Abstraction has 12826 states and 44940 transitions. [2021-06-12 22:21:46,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:46,716 INFO L276 IsEmpty]: Start isEmpty. Operand 12826 states and 44940 transitions. [2021-06-12 22:21:46,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:46,736 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:46,736 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:46,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-12 22:21:46,936 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:46,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:46,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1246962008, now seen corresponding path program 28 times [2021-06-12 22:21:46,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:46,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761184678] [2021-06-12 22:21:46,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:21:46,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:46,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761184678] [2021-06-12 22:21:46,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761184678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:46,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903129311] [2021-06-12 22:21:46,998 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 22:21:47,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:21:47,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:47,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:21:47,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:47,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903129311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:47,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:47,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2021-06-12 22:21:47,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476622367] [2021-06-12 22:21:47,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:21:47,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:47,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:21:47,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:21:47,153 INFO L87 Difference]: Start difference. First operand 12826 states and 44940 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:48,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:48,230 INFO L93 Difference]: Finished difference Result 26778 states and 89284 transitions. [2021-06-12 22:21:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:21:48,230 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:48,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:48,284 INFO L225 Difference]: With dead ends: 26778 [2021-06-12 22:21:48,285 INFO L226 Difference]: Without dead ends: 26778 [2021-06-12 22:21:48,285 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 616.0ms TimeCoverageRelationStatistics Valid=956, Invalid=2704, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:21:48,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26778 states. [2021-06-12 22:21:48,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26778 to 12913. [2021-06-12 22:21:48,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12913 states, 12912 states have (on average 3.5164188351920695) internal successors, (45404), 12912 states have internal predecessors, (45404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12913 states to 12913 states and 45404 transitions. [2021-06-12 22:21:48,659 INFO L78 Accepts]: Start accepts. Automaton has 12913 states and 45404 transitions. Word has length 36 [2021-06-12 22:21:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:48,659 INFO L482 AbstractCegarLoop]: Abstraction has 12913 states and 45404 transitions. [2021-06-12 22:21:48,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:48,659 INFO L276 IsEmpty]: Start isEmpty. Operand 12913 states and 45404 transitions. [2021-06-12 22:21:48,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:48,679 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:48,679 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:48,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-12 22:21:48,880 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:48,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:48,880 INFO L82 PathProgramCache]: Analyzing trace with hash 680135048, now seen corresponding path program 29 times [2021-06-12 22:21:48,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:48,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973936416] [2021-06-12 22:21:48,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:21:48,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:48,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973936416] [2021-06-12 22:21:48,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973936416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:48,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271361711] [2021-06-12 22:21:48,952 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 22:21:48,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 22:21:48,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:48,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:21:48,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:21:49,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271361711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:49,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:49,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 22:21:49,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144894086] [2021-06-12 22:21:49,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:21:49,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:49,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:21:49,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:21:49,162 INFO L87 Difference]: Start difference. First operand 12913 states and 45404 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:53,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:53,653 INFO L93 Difference]: Finished difference Result 28407 states and 94171 transitions. [2021-06-12 22:21:53,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-06-12 22:21:53,653 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:53,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:53,707 INFO L225 Difference]: With dead ends: 28407 [2021-06-12 22:21:53,707 INFO L226 Difference]: Without dead ends: 28387 [2021-06-12 22:21:53,710 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18300 ImplicationChecksByTransitivity, 3419.7ms TimeCoverageRelationStatistics Valid=7298, Invalid=36174, Unknown=0, NotChecked=0, Total=43472 [2021-06-12 22:21:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28387 states. [2021-06-12 22:21:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28387 to 13021. [2021-06-12 22:21:54,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13021 states, 13020 states have (on average 3.526804915514593) internal successors, (45919), 13020 states have internal predecessors, (45919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:54,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13021 states to 13021 states and 45919 transitions. [2021-06-12 22:21:54,107 INFO L78 Accepts]: Start accepts. Automaton has 13021 states and 45919 transitions. Word has length 36 [2021-06-12 22:21:54,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:54,107 INFO L482 AbstractCegarLoop]: Abstraction has 13021 states and 45919 transitions. [2021-06-12 22:21:54,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:54,108 INFO L276 IsEmpty]: Start isEmpty. Operand 13021 states and 45919 transitions. [2021-06-12 22:21:54,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:54,126 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:54,126 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:54,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:21:54,326 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:54,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:54,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1847708024, now seen corresponding path program 30 times [2021-06-12 22:21:54,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:54,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846727937] [2021-06-12 22:21:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:21:54,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:54,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846727937] [2021-06-12 22:21:54,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846727937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:54,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988774319] [2021-06-12 22:21:54,383 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 22:21:54,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 22:21:54,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:54,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 22:21:54,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:54,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-12 22:21:54,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:54,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:54,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:54,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-06-12 22:21:54,604 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-06-12 22:21:54,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-12 22:21:54,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:54,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:54,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:21:54,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-12 22:21:54,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:21:54,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:21:54,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:21:54,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-06-12 22:21:54,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:21:54,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:21:54,679 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 1 xjuncts. [2021-06-12 22:21:54,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-12 22:21:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 22:21:54,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988774319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:54,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:54,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-12 22:21:54,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090343537] [2021-06-12 22:21:54,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 22:21:54,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:54,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 22:21:54,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:21:54,772 INFO L87 Difference]: Start difference. First operand 13021 states and 45919 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:59,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:21:59,002 INFO L93 Difference]: Finished difference Result 25162 states and 83066 transitions. [2021-06-12 22:21:59,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2021-06-12 22:21:59,003 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:21:59,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:21:59,045 INFO L225 Difference]: With dead ends: 25162 [2021-06-12 22:21:59,046 INFO L226 Difference]: Without dead ends: 24983 [2021-06-12 22:21:59,048 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13764 ImplicationChecksByTransitivity, 3315.7ms TimeCoverageRelationStatistics Valid=4792, Invalid=29248, Unknown=0, NotChecked=0, Total=34040 [2021-06-12 22:21:59,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24983 states. [2021-06-12 22:21:59,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24983 to 13428. [2021-06-12 22:21:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13428 states, 13427 states have (on average 3.5044313696283607) internal successors, (47054), 13427 states have internal predecessors, (47054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:59,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13428 states to 13428 states and 47054 transitions. [2021-06-12 22:21:59,376 INFO L78 Accepts]: Start accepts. Automaton has 13428 states and 47054 transitions. Word has length 36 [2021-06-12 22:21:59,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:21:59,376 INFO L482 AbstractCegarLoop]: Abstraction has 13428 states and 47054 transitions. [2021-06-12 22:21:59,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:21:59,376 INFO L276 IsEmpty]: Start isEmpty. Operand 13428 states and 47054 transitions. [2021-06-12 22:21:59,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:21:59,396 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:21:59,396 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:21:59,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-12 22:21:59,596 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:21:59,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:21:59,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1284231232, now seen corresponding path program 86 times [2021-06-12 22:21:59,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:21:59,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423750099] [2021-06-12 22:21:59,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:21:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:21:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:21:59,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:21:59,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423750099] [2021-06-12 22:21:59,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423750099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:59,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378533235] [2021-06-12 22:21:59,653 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 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 22:21:59,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:21:59,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:21:59,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:21:59,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:21:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:21:59,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378533235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:21:59,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:21:59,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-12 22:21:59,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417113930] [2021-06-12 22:21:59,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:21:59,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:21:59,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:21:59,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:21:59,809 INFO L87 Difference]: Start difference. First operand 13428 states and 47054 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:00,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:00,653 INFO L93 Difference]: Finished difference Result 24409 states and 81988 transitions. [2021-06-12 22:22:00,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:22:00,653 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:00,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:00,693 INFO L225 Difference]: With dead ends: 24409 [2021-06-12 22:22:00,694 INFO L226 Difference]: Without dead ends: 24409 [2021-06-12 22:22:00,694 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 492.6ms TimeCoverageRelationStatistics Valid=614, Invalid=1836, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:22:00,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24409 states. [2021-06-12 22:22:00,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24409 to 13273. [2021-06-12 22:22:00,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13273 states, 13272 states have (on average 3.4954792043399636) internal successors, (46392), 13272 states have internal predecessors, (46392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13273 states to 13273 states and 46392 transitions. [2021-06-12 22:22:01,006 INFO L78 Accepts]: Start accepts. Automaton has 13273 states and 46392 transitions. Word has length 36 [2021-06-12 22:22:01,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:01,006 INFO L482 AbstractCegarLoop]: Abstraction has 13273 states and 46392 transitions. [2021-06-12 22:22:01,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 13273 states and 46392 transitions. [2021-06-12 22:22:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:01,024 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:01,025 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:01,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:01,225 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:01,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:01,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2050547776, now seen corresponding path program 87 times [2021-06-12 22:22:01,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:01,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865385426] [2021-06-12 22:22:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:22:01,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:01,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865385426] [2021-06-12 22:22:01,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865385426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:01,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741330560] [2021-06-12 22:22:01,276 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 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 22:22:01,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:22:01,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:01,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:22:01,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 22:22:01,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741330560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:01,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:01,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 22:22:01,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396118532] [2021-06-12 22:22:01,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:22:01,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:01,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:22:01,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:22:01,412 INFO L87 Difference]: Start difference. First operand 13273 states and 46392 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:01,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:01,889 INFO L93 Difference]: Finished difference Result 23775 states and 80054 transitions. [2021-06-12 22:22:01,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:22:01,889 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:01,930 INFO L225 Difference]: With dead ends: 23775 [2021-06-12 22:22:01,931 INFO L226 Difference]: Without dead ends: 23775 [2021-06-12 22:22:01,931 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 242.6ms TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:22:01,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23775 states. [2021-06-12 22:22:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23775 to 13214. [2021-06-12 22:22:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13214 states, 13213 states have (on average 3.4921668054189055) internal successors, (46142), 13213 states have internal predecessors, (46142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13214 states to 13214 states and 46142 transitions. [2021-06-12 22:22:02,265 INFO L78 Accepts]: Start accepts. Automaton has 13214 states and 46142 transitions. Word has length 36 [2021-06-12 22:22:02,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:02,265 INFO L482 AbstractCegarLoop]: Abstraction has 13214 states and 46142 transitions. [2021-06-12 22:22:02,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:02,266 INFO L276 IsEmpty]: Start isEmpty. Operand 13214 states and 46142 transitions. [2021-06-12 22:22:02,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:02,284 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:02,284 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:02,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-12 22:22:02,484 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:02,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:02,484 INFO L82 PathProgramCache]: Analyzing trace with hash 281583822, now seen corresponding path program 88 times [2021-06-12 22:22:02,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:02,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941412888] [2021-06-12 22:22:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:22:02,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:02,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941412888] [2021-06-12 22:22:02,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941412888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:02,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944785108] [2021-06-12 22:22:02,532 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 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 22:22:02,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:22:02,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:02,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:22:02,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 22:22:02,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944785108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:02,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:02,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2021-06-12 22:22:02,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124900074] [2021-06-12 22:22:02,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:22:02,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:02,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:22:02,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:22:02,662 INFO L87 Difference]: Start difference. First operand 13214 states and 46142 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:03,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:03,179 INFO L93 Difference]: Finished difference Result 23327 states and 78114 transitions. [2021-06-12 22:22:03,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:22:03,179 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:03,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:03,217 INFO L225 Difference]: With dead ends: 23327 [2021-06-12 22:22:03,217 INFO L226 Difference]: Without dead ends: 23327 [2021-06-12 22:22:03,217 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=312, Invalid=878, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:22:03,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23327 states. [2021-06-12 22:22:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23327 to 13240. [2021-06-12 22:22:03,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13240 states, 13239 states have (on average 3.4912757761160207) internal successors, (46221), 13239 states have internal predecessors, (46221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:03,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13240 states to 13240 states and 46221 transitions. [2021-06-12 22:22:03,527 INFO L78 Accepts]: Start accepts. Automaton has 13240 states and 46221 transitions. Word has length 36 [2021-06-12 22:22:03,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:03,527 INFO L482 AbstractCegarLoop]: Abstraction has 13240 states and 46221 transitions. [2021-06-12 22:22:03,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:03,527 INFO L276 IsEmpty]: Start isEmpty. Operand 13240 states and 46221 transitions. [2021-06-12 22:22:03,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:03,545 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:03,545 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:03,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-06-12 22:22:03,746 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:03,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:03,746 INFO L82 PathProgramCache]: Analyzing trace with hash 2012617660, now seen corresponding path program 89 times [2021-06-12 22:22:03,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:03,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246637852] [2021-06-12 22:22:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:22:03,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:03,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246637852] [2021-06-12 22:22:03,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246637852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:03,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930850166] [2021-06-12 22:22:03,803 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 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 22:22:03,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 22:22:03,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:03,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:22:03,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 22:22:03,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930850166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:03,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:03,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 22:22:03,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503009680] [2021-06-12 22:22:03,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:22:03,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:03,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:22:03,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:22:03,941 INFO L87 Difference]: Start difference. First operand 13240 states and 46221 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:05,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:05,429 INFO L93 Difference]: Finished difference Result 26376 states and 86731 transitions. [2021-06-12 22:22:05,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-12 22:22:05,429 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:05,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:05,479 INFO L225 Difference]: With dead ends: 26376 [2021-06-12 22:22:05,479 INFO L226 Difference]: Without dead ends: 26364 [2021-06-12 22:22:05,480 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2864 ImplicationChecksByTransitivity, 920.9ms TimeCoverageRelationStatistics Valid=1623, Invalid=6387, Unknown=0, NotChecked=0, Total=8010 [2021-06-12 22:22:05,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26364 states. [2021-06-12 22:22:05,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26364 to 13310. [2021-06-12 22:22:05,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13310 states, 13309 states have (on average 3.4776467052370577) internal successors, (46284), 13309 states have internal predecessors, (46284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:05,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13310 states to 13310 states and 46284 transitions. [2021-06-12 22:22:05,887 INFO L78 Accepts]: Start accepts. Automaton has 13310 states and 46284 transitions. Word has length 36 [2021-06-12 22:22:05,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:05,888 INFO L482 AbstractCegarLoop]: Abstraction has 13310 states and 46284 transitions. [2021-06-12 22:22:05,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:05,888 INFO L276 IsEmpty]: Start isEmpty. Operand 13310 states and 46284 transitions. [2021-06-12 22:22:05,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:05,907 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:05,907 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:06,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:06,108 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:06,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:06,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1239534524, now seen corresponding path program 90 times [2021-06-12 22:22:06,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:06,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970133509] [2021-06-12 22:22:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:22:06,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:06,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970133509] [2021-06-12 22:22:06,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970133509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:06,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92456157] [2021-06-12 22:22:06,164 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 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 22:22:06,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:22:06,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:06,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:22:06,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 22:22:06,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92456157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:06,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:06,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-12 22:22:06,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851003183] [2021-06-12 22:22:06,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:22:06,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:06,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:22:06,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:22:06,299 INFO L87 Difference]: Start difference. First operand 13310 states and 46284 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:07,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:07,169 INFO L93 Difference]: Finished difference Result 26781 states and 88963 transitions. [2021-06-12 22:22:07,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:22:07,169 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:07,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:07,219 INFO L225 Difference]: With dead ends: 26781 [2021-06-12 22:22:07,219 INFO L226 Difference]: Without dead ends: 26737 [2021-06-12 22:22:07,219 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 518.0ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:22:07,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26737 states. [2021-06-12 22:22:07,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26737 to 13708. [2021-06-12 22:22:07,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13708 states, 13707 states have (on average 3.4510104326256656) internal successors, (47303), 13707 states have internal predecessors, (47303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13708 states to 13708 states and 47303 transitions. [2021-06-12 22:22:07,557 INFO L78 Accepts]: Start accepts. Automaton has 13708 states and 47303 transitions. Word has length 36 [2021-06-12 22:22:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:07,557 INFO L482 AbstractCegarLoop]: Abstraction has 13708 states and 47303 transitions. [2021-06-12 22:22:07,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 13708 states and 47303 transitions. [2021-06-12 22:22:07,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:07,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:07,577 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:07,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:07,778 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:07,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:07,778 INFO L82 PathProgramCache]: Analyzing trace with hash 790366380, now seen corresponding path program 91 times [2021-06-12 22:22:07,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:07,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818279450] [2021-06-12 22:22:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:22:07,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:07,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818279450] [2021-06-12 22:22:07,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818279450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:07,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466794544] [2021-06-12 22:22:07,832 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 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 22:22:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:07,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:22:07,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:22:07,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466794544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:07,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:07,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2021-06-12 22:22:07,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753978823] [2021-06-12 22:22:07,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:22:07,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:07,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:22:07,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:22:07,948 INFO L87 Difference]: Start difference. First operand 13708 states and 47303 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:08,712 INFO L93 Difference]: Finished difference Result 26715 states and 87686 transitions. [2021-06-12 22:22:08,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:22:08,712 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:08,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:08,755 INFO L225 Difference]: With dead ends: 26715 [2021-06-12 22:22:08,755 INFO L226 Difference]: Without dead ends: 26715 [2021-06-12 22:22:08,755 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 401.3ms TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:22:08,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26715 states. [2021-06-12 22:22:09,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26715 to 14801. [2021-06-12 22:22:09,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14801 states, 14800 states have (on average 3.4525675675675678) internal successors, (51098), 14800 states have internal predecessors, (51098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:09,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14801 states to 14801 states and 51098 transitions. [2021-06-12 22:22:09,096 INFO L78 Accepts]: Start accepts. Automaton has 14801 states and 51098 transitions. Word has length 36 [2021-06-12 22:22:09,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:09,096 INFO L482 AbstractCegarLoop]: Abstraction has 14801 states and 51098 transitions. [2021-06-12 22:22:09,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:09,097 INFO L276 IsEmpty]: Start isEmpty. Operand 14801 states and 51098 transitions. [2021-06-12 22:22:09,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:09,117 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:09,117 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:09,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-12 22:22:09,317 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:09,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:09,318 INFO L82 PathProgramCache]: Analyzing trace with hash -2078452856, now seen corresponding path program 92 times [2021-06-12 22:22:09,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:09,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874543845] [2021-06-12 22:22:09,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:22:09,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:09,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874543845] [2021-06-12 22:22:09,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874543845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:09,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983550988] [2021-06-12 22:22:09,373 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 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 22:22:09,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:09,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:09,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:22:09,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 22:22:09,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983550988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:09,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:09,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-06-12 22:22:09,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122927884] [2021-06-12 22:22:09,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:22:09,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:09,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:22:09,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:22:09,486 INFO L87 Difference]: Start difference. First operand 14801 states and 51098 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:10,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:10,505 INFO L93 Difference]: Finished difference Result 26862 states and 89241 transitions. [2021-06-12 22:22:10,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:22:10,505 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:10,557 INFO L225 Difference]: With dead ends: 26862 [2021-06-12 22:22:10,557 INFO L226 Difference]: Without dead ends: 26794 [2021-06-12 22:22:10,558 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 583.5ms TimeCoverageRelationStatistics Valid=916, Invalid=3640, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:22:10,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26794 states. [2021-06-12 22:22:10,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26794 to 14135. [2021-06-12 22:22:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14135 states, 14134 states have (on average 3.475944530918353) internal successors, (49129), 14134 states have internal predecessors, (49129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:11,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14135 states to 14135 states and 49129 transitions. [2021-06-12 22:22:11,045 INFO L78 Accepts]: Start accepts. Automaton has 14135 states and 49129 transitions. Word has length 36 [2021-06-12 22:22:11,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:11,045 INFO L482 AbstractCegarLoop]: Abstraction has 14135 states and 49129 transitions. [2021-06-12 22:22:11,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:11,045 INFO L276 IsEmpty]: Start isEmpty. Operand 14135 states and 49129 transitions. [2021-06-12 22:22:11,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:11,065 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:11,065 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:11,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:11,265 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:11,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1434655568, now seen corresponding path program 93 times [2021-06-12 22:22:11,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:11,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616617668] [2021-06-12 22:22:11,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:11,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:11,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616617668] [2021-06-12 22:22:11,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616617668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:11,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974211096] [2021-06-12 22:22:11,328 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 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 22:22:11,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:22:11,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:11,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:22:11,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:11,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974211096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:11,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:11,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-12 22:22:11,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813941443] [2021-06-12 22:22:11,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:22:11,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:11,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:22:11,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:22:11,447 INFO L87 Difference]: Start difference. First operand 14135 states and 49129 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:12,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:12,347 INFO L93 Difference]: Finished difference Result 25932 states and 85483 transitions. [2021-06-12 22:22:12,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 22:22:12,347 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:12,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:12,400 INFO L225 Difference]: With dead ends: 25932 [2021-06-12 22:22:12,400 INFO L226 Difference]: Without dead ends: 25932 [2021-06-12 22:22:12,400 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 524.1ms TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:22:12,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25932 states. [2021-06-12 22:22:12,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25932 to 14667. [2021-06-12 22:22:12,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14667 states, 14666 states have (on average 3.455407063957453) internal successors, (50677), 14666 states have internal predecessors, (50677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:12,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14667 states to 14667 states and 50677 transitions. [2021-06-12 22:22:12,777 INFO L78 Accepts]: Start accepts. Automaton has 14667 states and 50677 transitions. Word has length 36 [2021-06-12 22:22:12,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:12,777 INFO L482 AbstractCegarLoop]: Abstraction has 14667 states and 50677 transitions. [2021-06-12 22:22:12,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:12,777 INFO L276 IsEmpty]: Start isEmpty. Operand 14667 states and 50677 transitions. [2021-06-12 22:22:12,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:12,797 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:12,797 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:12,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-12 22:22:12,998 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:12,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:12,998 INFO L82 PathProgramCache]: Analyzing trace with hash 296378270, now seen corresponding path program 94 times [2021-06-12 22:22:12,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:12,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208199680] [2021-06-12 22:22:12,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:13,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:13,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208199680] [2021-06-12 22:22:13,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208199680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:13,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486147637] [2021-06-12 22:22:13,055 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 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 22:22:13,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:22:13,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:13,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:22:13,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:22:13,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486147637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:13,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:13,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-12 22:22:13,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652793878] [2021-06-12 22:22:13,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:22:13,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:13,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:22:13,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:22:13,183 INFO L87 Difference]: Start difference. First operand 14667 states and 50677 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:14,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:14,933 INFO L93 Difference]: Finished difference Result 27978 states and 91670 transitions. [2021-06-12 22:22:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-06-12 22:22:14,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:14,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:14,984 INFO L225 Difference]: With dead ends: 27978 [2021-06-12 22:22:14,984 INFO L226 Difference]: Without dead ends: 27978 [2021-06-12 22:22:14,985 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5435 ImplicationChecksByTransitivity, 1134.0ms TimeCoverageRelationStatistics Valid=2370, Invalid=10740, Unknown=0, NotChecked=0, Total=13110 [2021-06-12 22:22:15,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27978 states. [2021-06-12 22:22:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27978 to 13839. [2021-06-12 22:22:15,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13839 states, 13838 states have (on average 3.4976875270992918) internal successors, (48401), 13838 states have internal predecessors, (48401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:15,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13839 states to 13839 states and 48401 transitions. [2021-06-12 22:22:15,346 INFO L78 Accepts]: Start accepts. Automaton has 13839 states and 48401 transitions. Word has length 36 [2021-06-12 22:22:15,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:15,346 INFO L482 AbstractCegarLoop]: Abstraction has 13839 states and 48401 transitions. [2021-06-12 22:22:15,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:15,346 INFO L276 IsEmpty]: Start isEmpty. Operand 13839 states and 48401 transitions. [2021-06-12 22:22:15,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:15,365 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:15,365 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:15,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-12 22:22:15,566 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:15,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:15,566 INFO L82 PathProgramCache]: Analyzing trace with hash -384155512, now seen corresponding path program 95 times [2021-06-12 22:22:15,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:15,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878277375] [2021-06-12 22:22:15,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:15,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:15,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878277375] [2021-06-12 22:22:15,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878277375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:15,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653322803] [2021-06-12 22:22:15,629 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 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 22:22:15,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:22:15,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:15,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:22:15,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:15,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653322803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:15,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:15,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-12 22:22:15,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155706321] [2021-06-12 22:22:15,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:22:15,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:15,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:22:15,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:22:15,746 INFO L87 Difference]: Start difference. First operand 13839 states and 48401 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:17,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:17,040 INFO L93 Difference]: Finished difference Result 26069 states and 86821 transitions. [2021-06-12 22:22:17,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 22:22:17,041 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:17,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:17,090 INFO L225 Difference]: With dead ends: 26069 [2021-06-12 22:22:17,090 INFO L226 Difference]: Without dead ends: 25977 [2021-06-12 22:22:17,090 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 739.7ms TimeCoverageRelationStatistics Valid=1207, Invalid=5435, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 22:22:17,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25977 states. [2021-06-12 22:22:17,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25977 to 14407. [2021-06-12 22:22:17,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14407 states, 14406 states have (on average 3.470637234485631) internal successors, (49998), 14406 states have internal predecessors, (49998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14407 states to 14407 states and 49998 transitions. [2021-06-12 22:22:17,441 INFO L78 Accepts]: Start accepts. Automaton has 14407 states and 49998 transitions. Word has length 36 [2021-06-12 22:22:17,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:17,441 INFO L482 AbstractCegarLoop]: Abstraction has 14407 states and 49998 transitions. [2021-06-12 22:22:17,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:17,441 INFO L276 IsEmpty]: Start isEmpty. Operand 14407 states and 49998 transitions. [2021-06-12 22:22:17,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:17,461 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:17,461 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:17,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-12 22:22:17,662 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:17,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:17,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1269898876, now seen corresponding path program 96 times [2021-06-12 22:22:17,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:17,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092190045] [2021-06-12 22:22:17,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:17,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:17,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092190045] [2021-06-12 22:22:17,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092190045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:17,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198435312] [2021-06-12 22:22:17,720 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 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 22:22:17,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:22:17,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:17,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 22:22:17,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:17,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-12 22:22:17,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:17,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:17,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:17,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:27 [2021-06-12 22:22:17,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:17,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-06-12 22:22:17,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:17,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:17,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:22:17,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-06-12 22:22:17,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:17,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:17,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:17,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2021-06-12 22:22:17,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:17,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:17,949 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 1 xjuncts. [2021-06-12 22:22:17,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:38 [2021-06-12 22:22:17,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:17,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:17,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-06-12 22:22:17,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:17,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:17,998 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 1 xjuncts. [2021-06-12 22:22:17,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:34 [2021-06-12 22:22:18,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:18,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:18,059 INFO L354 Elim1Store]: treesize reduction 48, result has 25.0 percent of original size [2021-06-12 22:22:18,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 38 [2021-06-12 22:22:18,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:18,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:18,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:22:18,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:46 [2021-06-12 22:22:18,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:18,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:18,157 INFO L354 Elim1Store]: treesize reduction 88, result has 19.3 percent of original size [2021-06-12 22:22:18,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 37 treesize of output 48 [2021-06-12 22:22:18,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:18,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:18,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:22:18,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:58 [2021-06-12 22:22:18,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:18,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:22:18,327 INFO L354 Elim1Store]: treesize reduction 136, result has 16.0 percent of original size [2021-06-12 22:22:18,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 58 [2021-06-12 22:22:18,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:22:18,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:22:18,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-12 22:22:18,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:70 [2021-06-12 22:22:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:18,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198435312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:18,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:18,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-06-12 22:22:18,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437805892] [2021-06-12 22:22:18,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 22:22:18,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:18,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 22:22:18,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:22:18,513 INFO L87 Difference]: Start difference. First operand 14407 states and 49998 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:21,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:21,500 INFO L93 Difference]: Finished difference Result 19437 states and 64480 transitions. [2021-06-12 22:22:21,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:22:21,500 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:21,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:21,532 INFO L225 Difference]: With dead ends: 19437 [2021-06-12 22:22:21,533 INFO L226 Difference]: Without dead ends: 19021 [2021-06-12 22:22:21,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 1800.7ms TimeCoverageRelationStatistics Valid=651, Invalid=5829, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 22:22:21,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19021 states. [2021-06-12 22:22:21,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19021 to 15957. [2021-06-12 22:22:21,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15957 states, 15956 states have (on average 3.4367009275507647) internal successors, (54836), 15956 states have internal predecessors, (54836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:21,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15957 states to 15957 states and 54836 transitions. [2021-06-12 22:22:21,840 INFO L78 Accepts]: Start accepts. Automaton has 15957 states and 54836 transitions. Word has length 36 [2021-06-12 22:22:21,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:21,840 INFO L482 AbstractCegarLoop]: Abstraction has 15957 states and 54836 transitions. [2021-06-12 22:22:21,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:21,840 INFO L276 IsEmpty]: Start isEmpty. Operand 15957 states and 54836 transitions. [2021-06-12 22:22:21,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:21,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:21,863 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:22,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:22,064 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:22,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:22,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1525571952, now seen corresponding path program 97 times [2021-06-12 22:22:22,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:22,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417903022] [2021-06-12 22:22:22,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:22,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:22,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417903022] [2021-06-12 22:22:22,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417903022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:22,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204557803] [2021-06-12 22:22:22,129 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 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 22:22:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:22,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:22:22,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:22,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204557803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:22,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:22,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 22:22:22,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45949548] [2021-06-12 22:22:22,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:22:22,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:22,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:22:22,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:22:22,303 INFO L87 Difference]: Start difference. First operand 15957 states and 54836 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:23,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:23,618 INFO L93 Difference]: Finished difference Result 31024 states and 101059 transitions. [2021-06-12 22:22:23,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 22:22:23,618 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:23,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:23,771 INFO L225 Difference]: With dead ends: 31024 [2021-06-12 22:22:23,771 INFO L226 Difference]: Without dead ends: 31024 [2021-06-12 22:22:23,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 856.3ms TimeCoverageRelationStatistics Valid=1344, Invalid=3912, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 22:22:23,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31024 states. [2021-06-12 22:22:24,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31024 to 16979. [2021-06-12 22:22:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16979 states, 16978 states have (on average 3.408234185416421) internal successors, (57865), 16978 states have internal predecessors, (57865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:24,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16979 states to 16979 states and 57865 transitions. [2021-06-12 22:22:24,155 INFO L78 Accepts]: Start accepts. Automaton has 16979 states and 57865 transitions. Word has length 36 [2021-06-12 22:22:24,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:24,155 INFO L482 AbstractCegarLoop]: Abstraction has 16979 states and 57865 transitions. [2021-06-12 22:22:24,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 16979 states and 57865 transitions. [2021-06-12 22:22:24,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:24,177 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:24,178 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:24,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-12 22:22:24,378 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:24,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:24,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1354812750, now seen corresponding path program 98 times [2021-06-12 22:22:24,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:24,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384995325] [2021-06-12 22:22:24,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:24,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:24,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384995325] [2021-06-12 22:22:24,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384995325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:24,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537409160] [2021-06-12 22:22:24,437 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 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 22:22:24,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:24,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:24,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:22:24,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:22:24,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537409160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:24,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:24,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 22:22:24,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764037038] [2021-06-12 22:22:24,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:22:24,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:24,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:22:24,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:22:24,633 INFO L87 Difference]: Start difference. First operand 16979 states and 57865 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:27,162 INFO L93 Difference]: Finished difference Result 33282 states and 107796 transitions. [2021-06-12 22:22:27,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-06-12 22:22:27,163 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:27,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:27,223 INFO L225 Difference]: With dead ends: 33282 [2021-06-12 22:22:27,223 INFO L226 Difference]: Without dead ends: 33254 [2021-06-12 22:22:27,224 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7204 ImplicationChecksByTransitivity, 1858.2ms TimeCoverageRelationStatistics Valid=3502, Invalid=14320, Unknown=0, NotChecked=0, Total=17822 [2021-06-12 22:22:27,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33254 states. [2021-06-12 22:22:27,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33254 to 16803. [2021-06-12 22:22:27,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16803 states, 16802 states have (on average 3.411082014045947) internal successors, (57313), 16802 states have internal predecessors, (57313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16803 states to 16803 states and 57313 transitions. [2021-06-12 22:22:27,660 INFO L78 Accepts]: Start accepts. Automaton has 16803 states and 57313 transitions. Word has length 36 [2021-06-12 22:22:27,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:27,660 INFO L482 AbstractCegarLoop]: Abstraction has 16803 states and 57313 transitions. [2021-06-12 22:22:27,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:27,660 INFO L276 IsEmpty]: Start isEmpty. Operand 16803 states and 57313 transitions. [2021-06-12 22:22:27,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:27,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:27,682 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:27,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-12 22:22:27,883 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:27,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:27,883 INFO L82 PathProgramCache]: Analyzing trace with hash 2057609742, now seen corresponding path program 99 times [2021-06-12 22:22:27,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:27,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718021455] [2021-06-12 22:22:27,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:27,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:27,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718021455] [2021-06-12 22:22:27,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718021455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:27,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387781026] [2021-06-12 22:22:27,950 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 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 22:22:27,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 22:22:27,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:27,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:22:27,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:28,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387781026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:28,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:28,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-12 22:22:28,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005679334] [2021-06-12 22:22:28,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:22:28,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:28,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:22:28,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:22:28,099 INFO L87 Difference]: Start difference. First operand 16803 states and 57313 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:29,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:29,644 INFO L93 Difference]: Finished difference Result 30475 states and 100578 transitions. [2021-06-12 22:22:29,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-12 22:22:29,644 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:29,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:29,702 INFO L225 Difference]: With dead ends: 30475 [2021-06-12 22:22:29,702 INFO L226 Difference]: Without dead ends: 30411 [2021-06-12 22:22:29,703 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 964.2ms TimeCoverageRelationStatistics Valid=1678, Invalid=5978, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 22:22:29,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30411 states. [2021-06-12 22:22:30,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30411 to 16624. [2021-06-12 22:22:30,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16624 states, 16623 states have (on average 3.411417914937135) internal successors, (56708), 16623 states have internal predecessors, (56708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16624 states to 16624 states and 56708 transitions. [2021-06-12 22:22:30,074 INFO L78 Accepts]: Start accepts. Automaton has 16624 states and 56708 transitions. Word has length 36 [2021-06-12 22:22:30,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:30,074 INFO L482 AbstractCegarLoop]: Abstraction has 16624 states and 56708 transitions. [2021-06-12 22:22:30,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:30,074 INFO L276 IsEmpty]: Start isEmpty. Operand 16624 states and 56708 transitions. [2021-06-12 22:22:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:30,096 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:30,096 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:30,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:30,296 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:30,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:30,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1448352448, now seen corresponding path program 100 times [2021-06-12 22:22:30,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:30,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766592095] [2021-06-12 22:22:30,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:30,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:30,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766592095] [2021-06-12 22:22:30,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766592095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:30,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454154501] [2021-06-12 22:22:30,352 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 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 22:22:30,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:22:30,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:30,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:22:30,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:30,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454154501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:30,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:30,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-12 22:22:30,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152696096] [2021-06-12 22:22:30,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:22:30,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:30,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:22:30,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:22:30,514 INFO L87 Difference]: Start difference. First operand 16624 states and 56708 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:31,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:31,512 INFO L93 Difference]: Finished difference Result 32379 states and 105054 transitions. [2021-06-12 22:22:31,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:22:31,513 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:31,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:31,572 INFO L225 Difference]: With dead ends: 32379 [2021-06-12 22:22:31,572 INFO L226 Difference]: Without dead ends: 32379 [2021-06-12 22:22:31,572 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 559.0ms TimeCoverageRelationStatistics Valid=832, Invalid=2360, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:22:31,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32379 states. [2021-06-12 22:22:32,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32379 to 17402. [2021-06-12 22:22:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17402 states, 17401 states have (on average 3.3985977817366817) internal successors, (59139), 17401 states have internal predecessors, (59139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:32,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17402 states to 17402 states and 59139 transitions. [2021-06-12 22:22:32,092 INFO L78 Accepts]: Start accepts. Automaton has 17402 states and 59139 transitions. Word has length 36 [2021-06-12 22:22:32,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:32,093 INFO L482 AbstractCegarLoop]: Abstraction has 17402 states and 59139 transitions. [2021-06-12 22:22:32,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:32,093 INFO L276 IsEmpty]: Start isEmpty. Operand 17402 states and 59139 transitions. [2021-06-12 22:22:32,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:32,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:32,115 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:32,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:32,316 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:32,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:32,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1791237454, now seen corresponding path program 101 times [2021-06-12 22:22:32,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:32,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393713316] [2021-06-12 22:22:32,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:32,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:32,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393713316] [2021-06-12 22:22:32,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393713316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:32,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062869220] [2021-06-12 22:22:32,375 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 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 22:22:32,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 22:22:32,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:32,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:22:32,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:32,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062869220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:32,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:32,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-12 22:22:32,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884765749] [2021-06-12 22:22:32,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:22:32,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:32,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:22:32,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:22:32,550 INFO L87 Difference]: Start difference. First operand 17402 states and 59139 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:33,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:33,432 INFO L93 Difference]: Finished difference Result 31791 states and 103499 transitions. [2021-06-12 22:22:33,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:22:33,432 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:33,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:33,488 INFO L225 Difference]: With dead ends: 31791 [2021-06-12 22:22:33,489 INFO L226 Difference]: Without dead ends: 31779 [2021-06-12 22:22:33,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 466.9ms TimeCoverageRelationStatistics Valid=606, Invalid=1944, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:22:33,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31779 states. [2021-06-12 22:22:34,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31779 to 17354. [2021-06-12 22:22:34,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17354 states, 17353 states have (on average 3.3990088169192645) internal successors, (58983), 17353 states have internal predecessors, (58983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17354 states to 17354 states and 58983 transitions. [2021-06-12 22:22:34,052 INFO L78 Accepts]: Start accepts. Automaton has 17354 states and 58983 transitions. Word has length 36 [2021-06-12 22:22:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:34,052 INFO L482 AbstractCegarLoop]: Abstraction has 17354 states and 58983 transitions. [2021-06-12 22:22:34,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 17354 states and 58983 transitions. [2021-06-12 22:22:34,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:34,073 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:34,073 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:34,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:34,274 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:34,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:34,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1020594904, now seen corresponding path program 102 times [2021-06-12 22:22:34,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:34,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786753352] [2021-06-12 22:22:34,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:34,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:34,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786753352] [2021-06-12 22:22:34,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786753352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:34,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882098398] [2021-06-12 22:22:34,329 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 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 22:22:34,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 22:22:34,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:34,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:22:34,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:22:34,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882098398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:34,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:34,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-12 22:22:34,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445588676] [2021-06-12 22:22:34,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:22:34,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:34,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:22:34,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:22:34,481 INFO L87 Difference]: Start difference. First operand 17354 states and 58983 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:37,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:37,698 INFO L93 Difference]: Finished difference Result 32845 states and 106582 transitions. [2021-06-12 22:22:37,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-12 22:22:37,699 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:37,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:37,761 INFO L225 Difference]: With dead ends: 32845 [2021-06-12 22:22:37,762 INFO L226 Difference]: Without dead ends: 32825 [2021-06-12 22:22:37,763 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11588 ImplicationChecksByTransitivity, 2285.2ms TimeCoverageRelationStatistics Valid=4603, Invalid=23453, Unknown=0, NotChecked=0, Total=28056 [2021-06-12 22:22:37,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32825 states. [2021-06-12 22:22:38,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32825 to 17254. [2021-06-12 22:22:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17254 states, 17253 states have (on average 3.4028284935953166) internal successors, (58709), 17253 states have internal predecessors, (58709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17254 states to 17254 states and 58709 transitions. [2021-06-12 22:22:38,212 INFO L78 Accepts]: Start accepts. Automaton has 17254 states and 58709 transitions. Word has length 36 [2021-06-12 22:22:38,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:38,212 INFO L482 AbstractCegarLoop]: Abstraction has 17254 states and 58709 transitions. [2021-06-12 22:22:38,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 17254 states and 58709 transitions. [2021-06-12 22:22:38,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:38,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:38,237 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:38,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-12 22:22:38,438 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:38,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:38,438 INFO L82 PathProgramCache]: Analyzing trace with hash 590890608, now seen corresponding path program 103 times [2021-06-12 22:22:38,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:38,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244066126] [2021-06-12 22:22:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:38,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:22:38,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:38,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244066126] [2021-06-12 22:22:38,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244066126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:38,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249175738] [2021-06-12 22:22:38,586 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 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 22:22:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:38,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:22:38,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:38,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249175738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:38,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:38,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 22:22:38,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977399446] [2021-06-12 22:22:38,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:22:38,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:38,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:22:38,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:22:38,744 INFO L87 Difference]: Start difference. First operand 17254 states and 58709 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:39,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:39,447 INFO L93 Difference]: Finished difference Result 36771 states and 121891 transitions. [2021-06-12 22:22:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:22:39,447 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:39,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:39,515 INFO L225 Difference]: With dead ends: 36771 [2021-06-12 22:22:39,515 INFO L226 Difference]: Without dead ends: 36771 [2021-06-12 22:22:39,515 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 321.7ms TimeCoverageRelationStatistics Valid=403, Invalid=1157, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:22:39,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36771 states. [2021-06-12 22:22:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36771 to 17615. [2021-06-12 22:22:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17615 states, 17614 states have (on average 3.421653230384921) internal successors, (60269), 17614 states have internal predecessors, (60269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17615 states to 17615 states and 60269 transitions. [2021-06-12 22:22:39,989 INFO L78 Accepts]: Start accepts. Automaton has 17615 states and 60269 transitions. Word has length 36 [2021-06-12 22:22:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:39,989 INFO L482 AbstractCegarLoop]: Abstraction has 17615 states and 60269 transitions. [2021-06-12 22:22:39,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:39,989 INFO L276 IsEmpty]: Start isEmpty. Operand 17615 states and 60269 transitions. [2021-06-12 22:22:40,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:40,012 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:40,012 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:40,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-12 22:22:40,213 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:40,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:40,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1255821764, now seen corresponding path program 104 times [2021-06-12 22:22:40,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:40,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735133985] [2021-06-12 22:22:40,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:40,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:40,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735133985] [2021-06-12 22:22:40,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735133985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:40,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454864429] [2021-06-12 22:22:40,294 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 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 22:22:40,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:40,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:40,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:22:40,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:22:40,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454864429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:40,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:40,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-06-12 22:22:40,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252716404] [2021-06-12 22:22:40,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:22:40,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:40,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:22:40,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:22:40,582 INFO L87 Difference]: Start difference. First operand 17615 states and 60269 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:43,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:43,648 INFO L93 Difference]: Finished difference Result 43448 states and 142049 transitions. [2021-06-12 22:22:43,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-06-12 22:22:43,648 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:43,821 INFO L225 Difference]: With dead ends: 43448 [2021-06-12 22:22:43,822 INFO L226 Difference]: Without dead ends: 43448 [2021-06-12 22:22:43,823 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11743 ImplicationChecksByTransitivity, 2323.5ms TimeCoverageRelationStatistics Valid=5181, Invalid=22209, Unknown=0, NotChecked=0, Total=27390 [2021-06-12 22:22:43,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43448 states. [2021-06-12 22:22:44,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43448 to 17843. [2021-06-12 22:22:44,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17843 states, 17842 states have (on average 3.444064566752606) internal successors, (61449), 17842 states have internal predecessors, (61449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:44,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17843 states to 17843 states and 61449 transitions. [2021-06-12 22:22:44,297 INFO L78 Accepts]: Start accepts. Automaton has 17843 states and 61449 transitions. Word has length 36 [2021-06-12 22:22:44,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:44,297 INFO L482 AbstractCegarLoop]: Abstraction has 17843 states and 61449 transitions. [2021-06-12 22:22:44,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:44,297 INFO L276 IsEmpty]: Start isEmpty. Operand 17843 states and 61449 transitions. [2021-06-12 22:22:44,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:44,321 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:44,321 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:44,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-12 22:22:44,521 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:44,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:44,521 INFO L82 PathProgramCache]: Analyzing trace with hash -428849322, now seen corresponding path program 105 times [2021-06-12 22:22:44,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:44,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81618789] [2021-06-12 22:22:44,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:44,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:44,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81618789] [2021-06-12 22:22:44,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81618789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:44,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253583357] [2021-06-12 22:22:44,597 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 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 22:22:44,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:22:44,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:44,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:22:44,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:44,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253583357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:44,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:44,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 22:22:44,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375663761] [2021-06-12 22:22:44,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:22:44,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:44,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:22:44,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:22:44,755 INFO L87 Difference]: Start difference. First operand 17843 states and 61449 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:47,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:47,022 INFO L93 Difference]: Finished difference Result 39837 states and 131123 transitions. [2021-06-12 22:22:47,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-12 22:22:47,023 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:47,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:47,099 INFO L225 Difference]: With dead ends: 39837 [2021-06-12 22:22:47,100 INFO L226 Difference]: Without dead ends: 39721 [2021-06-12 22:22:47,101 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6312 ImplicationChecksByTransitivity, 1575.2ms TimeCoverageRelationStatistics Valid=3104, Invalid=12396, Unknown=0, NotChecked=0, Total=15500 [2021-06-12 22:22:47,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39721 states. [2021-06-12 22:22:47,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39721 to 17669. [2021-06-12 22:22:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17669 states, 17668 states have (on average 3.4479284582295677) internal successors, (60918), 17668 states have internal predecessors, (60918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17669 states to 17669 states and 60918 transitions. [2021-06-12 22:22:47,626 INFO L78 Accepts]: Start accepts. Automaton has 17669 states and 60918 transitions. Word has length 36 [2021-06-12 22:22:47,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:47,626 INFO L482 AbstractCegarLoop]: Abstraction has 17669 states and 60918 transitions. [2021-06-12 22:22:47,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 21 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:47,626 INFO L276 IsEmpty]: Start isEmpty. Operand 17669 states and 60918 transitions. [2021-06-12 22:22:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:47,650 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:47,650 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:47,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-12 22:22:47,851 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:47,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:47,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1065316176, now seen corresponding path program 106 times [2021-06-12 22:22:47,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:47,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093538111] [2021-06-12 22:22:47,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:47,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:47,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093538111] [2021-06-12 22:22:47,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093538111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:47,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642083545] [2021-06-12 22:22:47,914 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 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 22:22:47,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:22:47,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:47,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:22:47,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:48,077 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-12 22:22:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:22:48,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642083545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:48,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:48,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-06-12 22:22:48,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350816991] [2021-06-12 22:22:48,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:22:48,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:48,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:22:48,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:22:48,174 INFO L87 Difference]: Start difference. First operand 17669 states and 60918 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:50,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:50,181 INFO L93 Difference]: Finished difference Result 38843 states and 128526 transitions. [2021-06-12 22:22:50,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-06-12 22:22:50,182 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:50,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:50,255 INFO L225 Difference]: With dead ends: 38843 [2021-06-12 22:22:50,256 INFO L226 Difference]: Without dead ends: 38727 [2021-06-12 22:22:50,257 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5135 ImplicationChecksByTransitivity, 1306.5ms TimeCoverageRelationStatistics Valid=2357, Invalid=10983, Unknown=0, NotChecked=0, Total=13340 [2021-06-12 22:22:50,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38727 states. [2021-06-12 22:22:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38727 to 17699. [2021-06-12 22:22:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17699 states, 17698 states have (on average 3.446208611142502) internal successors, (60991), 17698 states have internal predecessors, (60991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:50,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17699 states to 17699 states and 60991 transitions. [2021-06-12 22:22:50,851 INFO L78 Accepts]: Start accepts. Automaton has 17699 states and 60991 transitions. Word has length 36 [2021-06-12 22:22:50,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:50,851 INFO L482 AbstractCegarLoop]: Abstraction has 17699 states and 60991 transitions. [2021-06-12 22:22:50,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:50,851 INFO L276 IsEmpty]: Start isEmpty. Operand 17699 states and 60991 transitions. [2021-06-12 22:22:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:50,874 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:50,875 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:51,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:51,075 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:51,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:51,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1348989260, now seen corresponding path program 107 times [2021-06-12 22:22:51,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:51,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20098113] [2021-06-12 22:22:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:51,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:51,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20098113] [2021-06-12 22:22:51,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20098113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:51,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358496211] [2021-06-12 22:22:51,141 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 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 22:22:51,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:22:51,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:51,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:22:51,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:22:51,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358496211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:51,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:51,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2021-06-12 22:22:51,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409718121] [2021-06-12 22:22:51,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:22:51,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:51,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:22:51,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:22:51,301 INFO L87 Difference]: Start difference. First operand 17699 states and 60991 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:53,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:53,261 INFO L93 Difference]: Finished difference Result 37783 states and 125271 transitions. [2021-06-12 22:22:53,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-12 22:22:53,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:53,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:53,334 INFO L225 Difference]: With dead ends: 37783 [2021-06-12 22:22:53,335 INFO L226 Difference]: Without dead ends: 37663 [2021-06-12 22:22:53,335 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4108 ImplicationChecksByTransitivity, 1297.1ms TimeCoverageRelationStatistics Valid=2049, Invalid=9081, Unknown=0, NotChecked=0, Total=11130 [2021-06-12 22:22:53,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37663 states. [2021-06-12 22:22:53,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37663 to 18035. [2021-06-12 22:22:53,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18035 states, 18034 states have (on average 3.456692913385827) internal successors, (62338), 18034 states have internal predecessors, (62338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:53,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18035 states to 18035 states and 62338 transitions. [2021-06-12 22:22:53,852 INFO L78 Accepts]: Start accepts. Automaton has 18035 states and 62338 transitions. Word has length 36 [2021-06-12 22:22:53,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:53,852 INFO L482 AbstractCegarLoop]: Abstraction has 18035 states and 62338 transitions. [2021-06-12 22:22:53,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 18035 states and 62338 transitions. [2021-06-12 22:22:53,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:53,876 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:53,876 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:54,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-12 22:22:54,076 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:54,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:54,077 INFO L82 PathProgramCache]: Analyzing trace with hash 255839428, now seen corresponding path program 108 times [2021-06-12 22:22:54,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:54,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993065874] [2021-06-12 22:22:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:22:54,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:54,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993065874] [2021-06-12 22:22:54,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993065874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:54,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495876134] [2021-06-12 22:22:54,119 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 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 22:22:54,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:22:54,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:54,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:22:54,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:54,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495876134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:54,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:54,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 22:22:54,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292657373] [2021-06-12 22:22:54,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:22:54,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:54,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:22:54,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:22:54,262 INFO L87 Difference]: Start difference. First operand 18035 states and 62338 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:55,869 INFO L93 Difference]: Finished difference Result 41243 states and 137063 transitions. [2021-06-12 22:22:55,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-12 22:22:55,870 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:55,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:55,955 INFO L225 Difference]: With dead ends: 41243 [2021-06-12 22:22:55,955 INFO L226 Difference]: Without dead ends: 41243 [2021-06-12 22:22:55,955 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2866 ImplicationChecksByTransitivity, 997.7ms TimeCoverageRelationStatistics Valid=1732, Invalid=6100, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 22:22:56,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41243 states. [2021-06-12 22:22:56,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41243 to 18004. [2021-06-12 22:22:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18004 states, 18003 states have (on average 3.4605343553852137) internal successors, (62300), 18003 states have internal predecessors, (62300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:56,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18004 states to 18004 states and 62300 transitions. [2021-06-12 22:22:56,526 INFO L78 Accepts]: Start accepts. Automaton has 18004 states and 62300 transitions. Word has length 36 [2021-06-12 22:22:56,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:56,526 INFO L482 AbstractCegarLoop]: Abstraction has 18004 states and 62300 transitions. [2021-06-12 22:22:56,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:56,527 INFO L276 IsEmpty]: Start isEmpty. Operand 18004 states and 62300 transitions. [2021-06-12 22:22:56,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:56,551 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:56,551 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:56,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-12 22:22:56,752 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:56,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:56,752 INFO L82 PathProgramCache]: Analyzing trace with hash 30795628, now seen corresponding path program 109 times [2021-06-12 22:22:56,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:56,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28085009] [2021-06-12 22:22:56,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:56,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:56,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28085009] [2021-06-12 22:22:56,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28085009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:56,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651563283] [2021-06-12 22:22:56,811 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 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 22:22:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:56,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:22:56,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:22:56,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651563283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:56,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:56,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-12 22:22:56,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426565281] [2021-06-12 22:22:56,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:22:56,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:56,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:22:56,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:22:56,948 INFO L87 Difference]: Start difference. First operand 18004 states and 62300 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:58,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:22:58,511 INFO L93 Difference]: Finished difference Result 39031 states and 128601 transitions. [2021-06-12 22:22:58,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-12 22:22:58,512 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:22:58,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:22:58,590 INFO L225 Difference]: With dead ends: 39031 [2021-06-12 22:22:58,590 INFO L226 Difference]: Without dead ends: 38811 [2021-06-12 22:22:58,591 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2721 ImplicationChecksByTransitivity, 931.7ms TimeCoverageRelationStatistics Valid=1466, Invalid=6190, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 22:22:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38811 states. [2021-06-12 22:22:59,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38811 to 18070. [2021-06-12 22:22:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18070 states, 18069 states have (on average 3.458354087110521) internal successors, (62489), 18069 states have internal predecessors, (62489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18070 states to 18070 states and 62489 transitions. [2021-06-12 22:22:59,150 INFO L78 Accepts]: Start accepts. Automaton has 18070 states and 62489 transitions. Word has length 36 [2021-06-12 22:22:59,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:22:59,150 INFO L482 AbstractCegarLoop]: Abstraction has 18070 states and 62489 transitions. [2021-06-12 22:22:59,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:22:59,150 INFO L276 IsEmpty]: Start isEmpty. Operand 18070 states and 62489 transitions. [2021-06-12 22:22:59,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:22:59,176 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:22:59,176 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:22:59,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:22:59,376 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:22:59,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:22:59,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1503096560, now seen corresponding path program 110 times [2021-06-12 22:22:59,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:22:59,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249271732] [2021-06-12 22:22:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:22:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:22:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:22:59,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:22:59,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249271732] [2021-06-12 22:22:59,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249271732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:59,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049249384] [2021-06-12 22:22:59,435 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 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 22:22:59,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:22:59,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:22:59,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:22:59,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:22:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:22:59,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049249384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:22:59,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:22:59,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-12 22:22:59,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237217946] [2021-06-12 22:22:59,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:22:59,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:22:59,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:22:59,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:22:59,560 INFO L87 Difference]: Start difference. First operand 18070 states and 62489 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:01,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:01,848 INFO L93 Difference]: Finished difference Result 41905 states and 136821 transitions. [2021-06-12 22:23:01,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-06-12 22:23:01,848 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:01,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:01,935 INFO L225 Difference]: With dead ends: 41905 [2021-06-12 22:23:01,936 INFO L226 Difference]: Without dead ends: 41889 [2021-06-12 22:23:01,937 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7569 ImplicationChecksByTransitivity, 1497.4ms TimeCoverageRelationStatistics Valid=3281, Invalid=14541, Unknown=0, NotChecked=0, Total=17822 [2021-06-12 22:23:01,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41889 states. [2021-06-12 22:23:02,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41889 to 18381. [2021-06-12 22:23:02,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18381 states, 18380 states have (on average 3.4394450489662676) internal successors, (63217), 18380 states have internal predecessors, (63217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:02,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18381 states to 18381 states and 63217 transitions. [2021-06-12 22:23:02,644 INFO L78 Accepts]: Start accepts. Automaton has 18381 states and 63217 transitions. Word has length 36 [2021-06-12 22:23:02,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:02,645 INFO L482 AbstractCegarLoop]: Abstraction has 18381 states and 63217 transitions. [2021-06-12 22:23:02,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:02,645 INFO L276 IsEmpty]: Start isEmpty. Operand 18381 states and 63217 transitions. [2021-06-12 22:23:02,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:02,669 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:02,669 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:02,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:02,869 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:02,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:02,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1164442992, now seen corresponding path program 111 times [2021-06-12 22:23:02,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:02,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549933647] [2021-06-12 22:23:02,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:02,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:02,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549933647] [2021-06-12 22:23:02,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549933647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:02,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908509845] [2021-06-12 22:23:02,934 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 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 22:23:02,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:23:02,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:02,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:23:02,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:03,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908509845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:03,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:03,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-06-12 22:23:03,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027796371] [2021-06-12 22:23:03,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:23:03,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:03,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:23:03,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:23:03,057 INFO L87 Difference]: Start difference. First operand 18381 states and 63217 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:04,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:04,822 INFO L93 Difference]: Finished difference Result 39347 states and 129043 transitions. [2021-06-12 22:23:04,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-06-12 22:23:04,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:04,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:04,895 INFO L225 Difference]: With dead ends: 39347 [2021-06-12 22:23:04,895 INFO L226 Difference]: Without dead ends: 39111 [2021-06-12 22:23:04,896 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3939 ImplicationChecksByTransitivity, 1103.6ms TimeCoverageRelationStatistics Valid=2013, Invalid=8907, Unknown=0, NotChecked=0, Total=10920 [2021-06-12 22:23:04,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39111 states. [2021-06-12 22:23:05,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39111 to 18459. [2021-06-12 22:23:05,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18459 states, 18458 states have (on average 3.4369920901506124) internal successors, (63440), 18458 states have internal predecessors, (63440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18459 states to 18459 states and 63440 transitions. [2021-06-12 22:23:05,509 INFO L78 Accepts]: Start accepts. Automaton has 18459 states and 63440 transitions. Word has length 36 [2021-06-12 22:23:05,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:05,510 INFO L482 AbstractCegarLoop]: Abstraction has 18459 states and 63440 transitions. [2021-06-12 22:23:05,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:05,510 INFO L276 IsEmpty]: Start isEmpty. Operand 18459 states and 63440 transitions. [2021-06-12 22:23:05,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:05,534 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:05,534 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:05,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:05,734 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:05,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:05,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1293569036, now seen corresponding path program 112 times [2021-06-12 22:23:05,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:05,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367009370] [2021-06-12 22:23:05,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:05,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:05,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367009370] [2021-06-12 22:23:05,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367009370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:05,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221481699] [2021-06-12 22:23:05,795 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 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 22:23:05,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:23:05,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:05,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:23:05,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:23:05,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221481699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:05,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:05,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2021-06-12 22:23:05,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825232882] [2021-06-12 22:23:05,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:23:05,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:05,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:23:05,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:23:05,912 INFO L87 Difference]: Start difference. First operand 18459 states and 63440 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:07,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:07,824 INFO L93 Difference]: Finished difference Result 38875 states and 128248 transitions. [2021-06-12 22:23:07,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-12 22:23:07,824 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:07,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:07,902 INFO L225 Difference]: With dead ends: 38875 [2021-06-12 22:23:07,902 INFO L226 Difference]: Without dead ends: 38767 [2021-06-12 22:23:07,903 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4742 ImplicationChecksByTransitivity, 1145.0ms TimeCoverageRelationStatistics Valid=2364, Invalid=9626, Unknown=0, NotChecked=0, Total=11990 [2021-06-12 22:23:07,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38767 states. [2021-06-12 22:23:08,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38767 to 18901. [2021-06-12 22:23:08,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18901 states, 18900 states have (on average 3.4197354497354495) internal successors, (64633), 18900 states have internal predecessors, (64633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:08,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18901 states to 18901 states and 64633 transitions. [2021-06-12 22:23:08,447 INFO L78 Accepts]: Start accepts. Automaton has 18901 states and 64633 transitions. Word has length 36 [2021-06-12 22:23:08,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:08,447 INFO L482 AbstractCegarLoop]: Abstraction has 18901 states and 64633 transitions. [2021-06-12 22:23:08,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:08,447 INFO L276 IsEmpty]: Start isEmpty. Operand 18901 states and 64633 transitions. [2021-06-12 22:23:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:08,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:08,472 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:08,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-06-12 22:23:08,672 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:08,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:08,673 INFO L82 PathProgramCache]: Analyzing trace with hash -253287824, now seen corresponding path program 113 times [2021-06-12 22:23:08,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:08,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206833246] [2021-06-12 22:23:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:08,757 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:08,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:08,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206833246] [2021-06-12 22:23:08,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206833246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:08,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553464522] [2021-06-12 22:23:08,757 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 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 22:23:08,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:23:08,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:08,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:23:08,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:08,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553464522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:08,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:08,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2021-06-12 22:23:08,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179070764] [2021-06-12 22:23:08,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:23:08,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:08,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:23:08,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:23:08,896 INFO L87 Difference]: Start difference. First operand 18901 states and 64633 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:11,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:11,442 INFO L93 Difference]: Finished difference Result 40691 states and 133194 transitions. [2021-06-12 22:23:11,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-06-12 22:23:11,442 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:11,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:11,527 INFO L225 Difference]: With dead ends: 40691 [2021-06-12 22:23:11,527 INFO L226 Difference]: Without dead ends: 40691 [2021-06-12 22:23:11,529 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10041 ImplicationChecksByTransitivity, 1793.5ms TimeCoverageRelationStatistics Valid=4335, Invalid=18315, Unknown=0, NotChecked=0, Total=22650 [2021-06-12 22:23:11,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40691 states. [2021-06-12 22:23:12,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40691 to 17027. [2021-06-12 22:23:12,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17027 states, 17026 states have (on average 3.482086221073652) internal successors, (59286), 17026 states have internal predecessors, (59286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:12,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17027 states to 17027 states and 59286 transitions. [2021-06-12 22:23:12,187 INFO L78 Accepts]: Start accepts. Automaton has 17027 states and 59286 transitions. Word has length 36 [2021-06-12 22:23:12,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:12,187 INFO L482 AbstractCegarLoop]: Abstraction has 17027 states and 59286 transitions. [2021-06-12 22:23:12,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:12,187 INFO L276 IsEmpty]: Start isEmpty. Operand 17027 states and 59286 transitions. [2021-06-12 22:23:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:12,210 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:12,210 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:12,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-12 22:23:12,411 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:12,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:12,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1172720400, now seen corresponding path program 114 times [2021-06-12 22:23:12,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:12,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086493200] [2021-06-12 22:23:12,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:23:12,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:12,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086493200] [2021-06-12 22:23:12,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086493200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:12,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421450706] [2021-06-12 22:23:12,466 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 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 22:23:12,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:23:12,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:12,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:23:12,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:12,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421450706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:12,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:12,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 22:23:12,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181962969] [2021-06-12 22:23:12,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:23:12,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:12,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:23:12,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:23:12,635 INFO L87 Difference]: Start difference. First operand 17027 states and 59286 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:13,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:13,500 INFO L93 Difference]: Finished difference Result 36359 states and 121507 transitions. [2021-06-12 22:23:13,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:23:13,500 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:13,570 INFO L225 Difference]: With dead ends: 36359 [2021-06-12 22:23:13,570 INFO L226 Difference]: Without dead ends: 36359 [2021-06-12 22:23:13,571 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 424.2ms TimeCoverageRelationStatistics Valid=568, Invalid=1784, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:23:13,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36359 states. [2021-06-12 22:23:14,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36359 to 17013. [2021-06-12 22:23:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17013 states, 17012 states have (on average 3.477251351986833) internal successors, (59155), 17012 states have internal predecessors, (59155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:14,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17013 states to 17013 states and 59155 transitions. [2021-06-12 22:23:14,249 INFO L78 Accepts]: Start accepts. Automaton has 17013 states and 59155 transitions. Word has length 36 [2021-06-12 22:23:14,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:14,249 INFO L482 AbstractCegarLoop]: Abstraction has 17013 states and 59155 transitions. [2021-06-12 22:23:14,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:14,249 INFO L276 IsEmpty]: Start isEmpty. Operand 17013 states and 59155 transitions. [2021-06-12 22:23:14,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:14,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:14,274 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:14,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-12 22:23:14,475 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:14,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:14,475 INFO L82 PathProgramCache]: Analyzing trace with hash -248629260, now seen corresponding path program 115 times [2021-06-12 22:23:14,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:14,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105857922] [2021-06-12 22:23:14,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:23:14,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:14,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105857922] [2021-06-12 22:23:14,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105857922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:14,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112917857] [2021-06-12 22:23:14,646 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 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 22:23:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:14,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:23:14,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:14,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112917857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:14,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:14,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 22:23:14,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538837942] [2021-06-12 22:23:14,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:23:14,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:14,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:23:14,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:23:14,829 INFO L87 Difference]: Start difference. First operand 17013 states and 59155 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:16,060 INFO L93 Difference]: Finished difference Result 37754 states and 124912 transitions. [2021-06-12 22:23:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:23:16,061 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:16,135 INFO L225 Difference]: With dead ends: 37754 [2021-06-12 22:23:16,135 INFO L226 Difference]: Without dead ends: 37754 [2021-06-12 22:23:16,135 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 622.3ms TimeCoverageRelationStatistics Valid=910, Invalid=2996, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:23:16,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37754 states. [2021-06-12 22:23:16,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37754 to 17024. [2021-06-12 22:23:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17024 states, 17023 states have (on average 3.4766492392645243) internal successors, (59183), 17023 states have internal predecessors, (59183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:16,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17024 states to 17024 states and 59183 transitions. [2021-06-12 22:23:16,611 INFO L78 Accepts]: Start accepts. Automaton has 17024 states and 59183 transitions. Word has length 36 [2021-06-12 22:23:16,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:16,611 INFO L482 AbstractCegarLoop]: Abstraction has 17024 states and 59183 transitions. [2021-06-12 22:23:16,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:16,611 INFO L276 IsEmpty]: Start isEmpty. Operand 17024 states and 59183 transitions. [2021-06-12 22:23:16,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:16,633 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:16,633 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:16,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-12 22:23:16,834 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:16,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:16,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1447944180, now seen corresponding path program 116 times [2021-06-12 22:23:16,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:16,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484110666] [2021-06-12 22:23:16,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:23:16,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:16,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484110666] [2021-06-12 22:23:16,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484110666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:16,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509639188] [2021-06-12 22:23:16,891 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 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 22:23:16,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:23:16,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:16,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:23:16,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:17,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509639188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:17,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:17,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 22:23:17,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155014687] [2021-06-12 22:23:17,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:23:17,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:17,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:23:17,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:23:17,277 INFO L87 Difference]: Start difference. First operand 17024 states and 59183 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:18,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:18,480 INFO L93 Difference]: Finished difference Result 37846 states and 125454 transitions. [2021-06-12 22:23:18,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 22:23:18,481 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:18,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:18,552 INFO L225 Difference]: With dead ends: 37846 [2021-06-12 22:23:18,552 INFO L226 Difference]: Without dead ends: 37846 [2021-06-12 22:23:18,552 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 657.6ms TimeCoverageRelationStatistics Valid=959, Invalid=3073, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:23:18,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37846 states. [2021-06-12 22:23:18,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37846 to 17016. [2021-06-12 22:23:18,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17016 states, 17015 states have (on average 3.4787540405524537) internal successors, (59191), 17015 states have internal predecessors, (59191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:19,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17016 states to 17016 states and 59191 transitions. [2021-06-12 22:23:19,025 INFO L78 Accepts]: Start accepts. Automaton has 17016 states and 59191 transitions. Word has length 36 [2021-06-12 22:23:19,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:19,025 INFO L482 AbstractCegarLoop]: Abstraction has 17016 states and 59191 transitions. [2021-06-12 22:23:19,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:19,025 INFO L276 IsEmpty]: Start isEmpty. Operand 17016 states and 59191 transitions. [2021-06-12 22:23:19,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:19,047 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:19,047 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:19,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-12 22:23:19,248 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:19,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:19,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1463404976, now seen corresponding path program 117 times [2021-06-12 22:23:19,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:19,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829469553] [2021-06-12 22:23:19,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:23:19,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:19,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829469553] [2021-06-12 22:23:19,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829469553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:19,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325837603] [2021-06-12 22:23:19,415 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 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 22:23:19,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:23:19,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:19,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 22:23:19,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:19,607 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-12 22:23:19,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-06-12 22:23:19,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:19,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:19,690 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 1 xjuncts. [2021-06-12 22:23:19,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:30 [2021-06-12 22:23:19,777 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-06-12 22:23:19,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-12 22:23:19,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:19,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:19,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-12 22:23:19,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:42 [2021-06-12 22:23:19,864 INFO L354 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2021-06-12 22:23:19,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-06-12 22:23:19,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:19,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:19,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-12 22:23:19,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:54 [2021-06-12 22:23:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 22:23:20,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325837603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:20,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:20,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-12 22:23:20,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3482695] [2021-06-12 22:23:20,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:23:20,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:20,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:23:20,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:23:20,123 INFO L87 Difference]: Start difference. First operand 17016 states and 59191 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:23,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:23,626 INFO L93 Difference]: Finished difference Result 29934 states and 99159 transitions. [2021-06-12 22:23:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 22:23:23,626 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:23,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:23,682 INFO L225 Difference]: With dead ends: 29934 [2021-06-12 22:23:23,682 INFO L226 Difference]: Without dead ends: 29934 [2021-06-12 22:23:23,683 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3260 ImplicationChecksByTransitivity, 2632.7ms TimeCoverageRelationStatistics Valid=1800, Invalid=8300, Unknown=0, NotChecked=0, Total=10100 [2021-06-12 22:23:23,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29934 states. [2021-06-12 22:23:24,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29934 to 17104. [2021-06-12 22:23:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17104 states, 17103 states have (on average 3.484067122727007) internal successors, (59588), 17103 states have internal predecessors, (59588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:24,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17104 states to 17104 states and 59588 transitions. [2021-06-12 22:23:24,101 INFO L78 Accepts]: Start accepts. Automaton has 17104 states and 59588 transitions. Word has length 36 [2021-06-12 22:23:24,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:24,102 INFO L482 AbstractCegarLoop]: Abstraction has 17104 states and 59588 transitions. [2021-06-12 22:23:24,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 24 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:24,102 INFO L276 IsEmpty]: Start isEmpty. Operand 17104 states and 59588 transitions. [2021-06-12 22:23:24,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:24,124 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:24,124 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:24,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:24,325 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:24,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:24,325 INFO L82 PathProgramCache]: Analyzing trace with hash -784175790, now seen corresponding path program 118 times [2021-06-12 22:23:24,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:24,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992890447] [2021-06-12 22:23:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:23:24,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:24,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992890447] [2021-06-12 22:23:24,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992890447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:24,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59860445] [2021-06-12 22:23:24,372 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 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 22:23:24,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:23:24,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:24,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:23:24,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:23:24,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59860445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:24,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:24,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 22:23:24,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697014389] [2021-06-12 22:23:24,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:23:24,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:24,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:23:24,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:23:24,556 INFO L87 Difference]: Start difference. First operand 17104 states and 59588 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:27,231 INFO L93 Difference]: Finished difference Result 36789 states and 120419 transitions. [2021-06-12 22:23:27,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-06-12 22:23:27,232 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:27,419 INFO L225 Difference]: With dead ends: 36789 [2021-06-12 22:23:27,419 INFO L226 Difference]: Without dead ends: 36789 [2021-06-12 22:23:27,419 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7472 ImplicationChecksByTransitivity, 1763.1ms TimeCoverageRelationStatistics Valid=3298, Invalid=15608, Unknown=0, NotChecked=0, Total=18906 [2021-06-12 22:23:27,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36789 states. [2021-06-12 22:23:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36789 to 17371. [2021-06-12 22:23:27,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17371 states, 17370 states have (on average 3.482153137593552) internal successors, (60485), 17370 states have internal predecessors, (60485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:27,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17371 states to 17371 states and 60485 transitions. [2021-06-12 22:23:27,929 INFO L78 Accepts]: Start accepts. Automaton has 17371 states and 60485 transitions. Word has length 36 [2021-06-12 22:23:27,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:27,929 INFO L482 AbstractCegarLoop]: Abstraction has 17371 states and 60485 transitions. [2021-06-12 22:23:27,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:27,929 INFO L276 IsEmpty]: Start isEmpty. Operand 17371 states and 60485 transitions. [2021-06-12 22:23:27,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:27,952 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:27,952 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:28,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-12 22:23:28,153 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:28,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:28,153 INFO L82 PathProgramCache]: Analyzing trace with hash -265224148, now seen corresponding path program 119 times [2021-06-12 22:23:28,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:28,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551472732] [2021-06-12 22:23:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:28,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:28,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551472732] [2021-06-12 22:23:28,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551472732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:28,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781034424] [2021-06-12 22:23:28,208 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 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 22:23:28,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 22:23:28,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:28,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:23:28,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:28,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781034424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:28,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:28,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-12 22:23:28,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352327185] [2021-06-12 22:23:28,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:23:28,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:28,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:23:28,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:23:28,354 INFO L87 Difference]: Start difference. First operand 17371 states and 60485 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:30,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:30,156 INFO L93 Difference]: Finished difference Result 34245 states and 114443 transitions. [2021-06-12 22:23:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-06-12 22:23:30,157 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:30,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:30,219 INFO L225 Difference]: With dead ends: 34245 [2021-06-12 22:23:30,219 INFO L226 Difference]: Without dead ends: 34173 [2021-06-12 22:23:30,220 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3600 ImplicationChecksByTransitivity, 1201.2ms TimeCoverageRelationStatistics Valid=2064, Invalid=7836, Unknown=0, NotChecked=0, Total=9900 [2021-06-12 22:23:30,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34173 states. [2021-06-12 22:23:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34173 to 16919. [2021-06-12 22:23:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16919 states, 16918 states have (on average 3.4816763210781416) internal successors, (58903), 16918 states have internal predecessors, (58903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16919 states to 16919 states and 58903 transitions. [2021-06-12 22:23:30,737 INFO L78 Accepts]: Start accepts. Automaton has 16919 states and 58903 transitions. Word has length 36 [2021-06-12 22:23:30,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:30,737 INFO L482 AbstractCegarLoop]: Abstraction has 16919 states and 58903 transitions. [2021-06-12 22:23:30,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:30,737 INFO L276 IsEmpty]: Start isEmpty. Operand 16919 states and 58903 transitions. [2021-06-12 22:23:30,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:30,760 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:30,760 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:30,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-12 22:23:30,960 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:30,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:30,960 INFO L82 PathProgramCache]: Analyzing trace with hash -907070356, now seen corresponding path program 120 times [2021-06-12 22:23:30,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:30,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681047831] [2021-06-12 22:23:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:31,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:31,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:31,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681047831] [2021-06-12 22:23:31,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681047831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:31,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32141817] [2021-06-12 22:23:31,024 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 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 22:23:31,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 22:23:31,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:31,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:23:31,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:23:31,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32141817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:31,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:31,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2021-06-12 22:23:31,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024799414] [2021-06-12 22:23:31,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:23:31,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:31,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:23:31,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:23:31,167 INFO L87 Difference]: Start difference. First operand 16919 states and 58903 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:32,768 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-06-12 22:23:33,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:33,207 INFO L93 Difference]: Finished difference Result 34016 states and 113681 transitions. [2021-06-12 22:23:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-12 22:23:33,207 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:33,267 INFO L225 Difference]: With dead ends: 34016 [2021-06-12 22:23:33,268 INFO L226 Difference]: Without dead ends: 33956 [2021-06-12 22:23:33,268 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4457 ImplicationChecksByTransitivity, 1338.1ms TimeCoverageRelationStatistics Valid=2358, Invalid=9852, Unknown=0, NotChecked=0, Total=12210 [2021-06-12 22:23:33,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33956 states. [2021-06-12 22:23:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33956 to 16875. [2021-06-12 22:23:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16875 states, 16874 states have (on average 3.4836434751688987) internal successors, (58783), 16874 states have internal predecessors, (58783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16875 states to 16875 states and 58783 transitions. [2021-06-12 22:23:33,671 INFO L78 Accepts]: Start accepts. Automaton has 16875 states and 58783 transitions. Word has length 36 [2021-06-12 22:23:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:33,672 INFO L482 AbstractCegarLoop]: Abstraction has 16875 states and 58783 transitions. [2021-06-12 22:23:33,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:33,672 INFO L276 IsEmpty]: Start isEmpty. Operand 16875 states and 58783 transitions. [2021-06-12 22:23:33,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:33,693 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:33,693 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:33,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:33,894 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:33,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:33,894 INFO L82 PathProgramCache]: Analyzing trace with hash -719103608, now seen corresponding path program 121 times [2021-06-12 22:23:33,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:33,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521213879] [2021-06-12 22:23:33,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:33,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:33,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521213879] [2021-06-12 22:23:33,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521213879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:33,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842879944] [2021-06-12 22:23:33,953 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 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 22:23:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:33,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:23:33,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:23:34,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842879944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:34,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:34,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 22:23:34,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595329382] [2021-06-12 22:23:34,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:23:34,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:34,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:23:34,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:23:34,130 INFO L87 Difference]: Start difference. First operand 16875 states and 58783 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:35,319 INFO L93 Difference]: Finished difference Result 38582 states and 129677 transitions. [2021-06-12 22:23:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 22:23:35,319 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:35,394 INFO L225 Difference]: With dead ends: 38582 [2021-06-12 22:23:35,394 INFO L226 Difference]: Without dead ends: 38582 [2021-06-12 22:23:35,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 697.4ms TimeCoverageRelationStatistics Valid=922, Invalid=3110, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 22:23:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38582 states. [2021-06-12 22:23:35,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38582 to 17496. [2021-06-12 22:23:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17496 states, 17495 states have (on average 3.5108316661903403) internal successors, (61422), 17495 states have internal predecessors, (61422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:35,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17496 states to 17496 states and 61422 transitions. [2021-06-12 22:23:35,876 INFO L78 Accepts]: Start accepts. Automaton has 17496 states and 61422 transitions. Word has length 36 [2021-06-12 22:23:35,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:35,876 INFO L482 AbstractCegarLoop]: Abstraction has 17496 states and 61422 transitions. [2021-06-12 22:23:35,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:35,876 INFO L276 IsEmpty]: Start isEmpty. Operand 17496 states and 61422 transitions. [2021-06-12 22:23:35,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:35,899 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:35,899 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:36,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:36,100 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:36,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:36,100 INFO L82 PathProgramCache]: Analyzing trace with hash -703642812, now seen corresponding path program 122 times [2021-06-12 22:23:36,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:36,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806435527] [2021-06-12 22:23:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:36,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:36,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806435527] [2021-06-12 22:23:36,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806435527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:36,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669183313] [2021-06-12 22:23:36,157 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 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 22:23:36,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:23:36,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:36,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:23:36,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:23:36,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669183313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:36,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:36,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 22:23:36,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528171578] [2021-06-12 22:23:36,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:23:36,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:36,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:23:36,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:23:36,336 INFO L87 Difference]: Start difference. First operand 17496 states and 61422 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:37,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:37,684 INFO L93 Difference]: Finished difference Result 39068 states and 130518 transitions. [2021-06-12 22:23:37,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:23:37,684 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:37,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:37,759 INFO L225 Difference]: With dead ends: 39068 [2021-06-12 22:23:37,759 INFO L226 Difference]: Without dead ends: 39068 [2021-06-12 22:23:37,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 711.2ms TimeCoverageRelationStatistics Valid=1170, Invalid=3660, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:23:37,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39068 states. [2021-06-12 22:23:38,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39068 to 17040. [2021-06-12 22:23:38,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17040 states, 17039 states have (on average 3.4929866776219263) internal successors, (59517), 17039 states have internal predecessors, (59517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17040 states to 17040 states and 59517 transitions. [2021-06-12 22:23:38,365 INFO L78 Accepts]: Start accepts. Automaton has 17040 states and 59517 transitions. Word has length 36 [2021-06-12 22:23:38,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:38,365 INFO L482 AbstractCegarLoop]: Abstraction has 17040 states and 59517 transitions. [2021-06-12 22:23:38,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:38,365 INFO L276 IsEmpty]: Start isEmpty. Operand 17040 states and 59517 transitions. [2021-06-12 22:23:38,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:38,389 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:38,389 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:38,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:38,590 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:38,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:38,590 INFO L82 PathProgramCache]: Analyzing trace with hash 444490688, now seen corresponding path program 123 times [2021-06-12 22:23:38,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:38,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694089243] [2021-06-12 22:23:38,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:38,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:38,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694089243] [2021-06-12 22:23:38,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694089243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:38,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071665891] [2021-06-12 22:23:38,649 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 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 22:23:38,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:23:38,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:38,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:23:38,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:23:38,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071665891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:38,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:38,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 22:23:38,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227240159] [2021-06-12 22:23:38,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:23:38,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:38,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:23:38,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:23:38,820 INFO L87 Difference]: Start difference. First operand 17040 states and 59517 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:39,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:39,763 INFO L93 Difference]: Finished difference Result 35719 states and 119509 transitions. [2021-06-12 22:23:39,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:23:39,764 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:39,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:39,831 INFO L225 Difference]: With dead ends: 35719 [2021-06-12 22:23:39,831 INFO L226 Difference]: Without dead ends: 35719 [2021-06-12 22:23:39,831 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 507.9ms TimeCoverageRelationStatistics Valid=703, Invalid=2377, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 22:23:39,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35719 states. [2021-06-12 22:23:40,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35719 to 16855. [2021-06-12 22:23:40,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16855 states, 16854 states have (on average 3.483683398599739) internal successors, (58714), 16854 states have internal predecessors, (58714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:40,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16855 states to 16855 states and 58714 transitions. [2021-06-12 22:23:40,433 INFO L78 Accepts]: Start accepts. Automaton has 16855 states and 58714 transitions. Word has length 36 [2021-06-12 22:23:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:40,433 INFO L482 AbstractCegarLoop]: Abstraction has 16855 states and 58714 transitions. [2021-06-12 22:23:40,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 16855 states and 58714 transitions. [2021-06-12 22:23:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:40,457 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:40,457 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:40,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:40,658 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:40,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:40,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1078249612, now seen corresponding path program 124 times [2021-06-12 22:23:40,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:40,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537844755] [2021-06-12 22:23:40,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:40,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:40,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537844755] [2021-06-12 22:23:40,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537844755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:40,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123482689] [2021-06-12 22:23:40,715 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 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 22:23:40,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:23:40,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:40,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:23:40,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:23:40,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123482689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:40,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:40,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-12 22:23:40,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682134613] [2021-06-12 22:23:40,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:23:40,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:40,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:23:40,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:23:40,899 INFO L87 Difference]: Start difference. First operand 16855 states and 58714 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:41,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:41,759 INFO L93 Difference]: Finished difference Result 34570 states and 115444 transitions. [2021-06-12 22:23:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:23:41,760 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:41,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:41,829 INFO L225 Difference]: With dead ends: 34570 [2021-06-12 22:23:41,829 INFO L226 Difference]: Without dead ends: 34570 [2021-06-12 22:23:41,829 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 439.9ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:23:41,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34570 states. [2021-06-12 22:23:42,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34570 to 16873. [2021-06-12 22:23:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16873 states, 16872 states have (on average 3.4834637268847795) internal successors, (58773), 16872 states have internal predecessors, (58773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16873 states to 16873 states and 58773 transitions. [2021-06-12 22:23:42,261 INFO L78 Accepts]: Start accepts. Automaton has 16873 states and 58773 transitions. Word has length 36 [2021-06-12 22:23:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:42,261 INFO L482 AbstractCegarLoop]: Abstraction has 16873 states and 58773 transitions. [2021-06-12 22:23:42,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:42,261 INFO L276 IsEmpty]: Start isEmpty. Operand 16873 states and 58773 transitions. [2021-06-12 22:23:42,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:42,283 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:42,283 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:42,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-12 22:23:42,484 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:42,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:42,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1249008814, now seen corresponding path program 125 times [2021-06-12 22:23:42,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:42,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984235867] [2021-06-12 22:23:42,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:42,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:42,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984235867] [2021-06-12 22:23:42,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984235867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:42,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801357221] [2021-06-12 22:23:42,546 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 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 22:23:42,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 22:23:42,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:42,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:23:42,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:23:42,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801357221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:42,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:42,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 22:23:42,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570391686] [2021-06-12 22:23:42,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:23:42,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:42,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:23:42,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:23:42,714 INFO L87 Difference]: Start difference. First operand 16873 states and 58773 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:44,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:44,864 INFO L93 Difference]: Finished difference Result 36187 states and 119134 transitions. [2021-06-12 22:23:44,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-12 22:23:44,865 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:44,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:44,926 INFO L225 Difference]: With dead ends: 36187 [2021-06-12 22:23:44,926 INFO L226 Difference]: Without dead ends: 36183 [2021-06-12 22:23:44,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4706 ImplicationChecksByTransitivity, 1314.1ms TimeCoverageRelationStatistics Valid=2270, Invalid=10612, Unknown=0, NotChecked=0, Total=12882 [2021-06-12 22:23:44,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36183 states. [2021-06-12 22:23:45,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36183 to 17057. [2021-06-12 22:23:45,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17057 states, 17056 states have (on average 3.480593339587242) internal successors, (59365), 17056 states have internal predecessors, (59365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:45,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17057 states to 17057 states and 59365 transitions. [2021-06-12 22:23:45,380 INFO L78 Accepts]: Start accepts. Automaton has 17057 states and 59365 transitions. Word has length 36 [2021-06-12 22:23:45,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:45,380 INFO L482 AbstractCegarLoop]: Abstraction has 17057 states and 59365 transitions. [2021-06-12 22:23:45,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:45,380 INFO L276 IsEmpty]: Start isEmpty. Operand 17057 states and 59365 transitions. [2021-06-12 22:23:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:45,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:45,403 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:45,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:23:45,603 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:45,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:45,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1793730568, now seen corresponding path program 126 times [2021-06-12 22:23:45,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:45,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780788071] [2021-06-12 22:23:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:45,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:45,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780788071] [2021-06-12 22:23:45,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780788071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:45,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637706118] [2021-06-12 22:23:45,654 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 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 22:23:45,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:23:45,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:45,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:23:45,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 22:23:45,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637706118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:45,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:45,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-12 22:23:45,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895994336] [2021-06-12 22:23:45,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:23:45,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:45,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:23:45,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:23:45,807 INFO L87 Difference]: Start difference. First operand 17057 states and 59365 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:48,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:48,077 INFO L93 Difference]: Finished difference Result 38126 states and 127134 transitions. [2021-06-12 22:23:48,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-06-12 22:23:48,078 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:48,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:48,149 INFO L225 Difference]: With dead ends: 38126 [2021-06-12 22:23:48,149 INFO L226 Difference]: Without dead ends: 38126 [2021-06-12 22:23:48,150 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5730 ImplicationChecksByTransitivity, 1387.5ms TimeCoverageRelationStatistics Valid=2664, Invalid=11856, Unknown=0, NotChecked=0, Total=14520 [2021-06-12 22:23:48,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38126 states. [2021-06-12 22:23:48,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38126 to 17565. [2021-06-12 22:23:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17565 states, 17564 states have (on average 3.4988613072193124) internal successors, (61454), 17564 states have internal predecessors, (61454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17565 states to 17565 states and 61454 transitions. [2021-06-12 22:23:48,641 INFO L78 Accepts]: Start accepts. Automaton has 17565 states and 61454 transitions. Word has length 36 [2021-06-12 22:23:48,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:48,641 INFO L482 AbstractCegarLoop]: Abstraction has 17565 states and 61454 transitions. [2021-06-12 22:23:48,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:48,641 INFO L276 IsEmpty]: Start isEmpty. Operand 17565 states and 61454 transitions. [2021-06-12 22:23:48,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:48,664 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:48,664 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:48,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-12 22:23:48,865 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:48,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1809191364, now seen corresponding path program 127 times [2021-06-12 22:23:48,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:48,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413258053] [2021-06-12 22:23:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:48,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:48,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413258053] [2021-06-12 22:23:48,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413258053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:48,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671571124] [2021-06-12 22:23:48,915 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 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 22:23:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:48,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:23:48,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:23:49,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671571124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:49,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:49,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-12 22:23:49,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046140957] [2021-06-12 22:23:49,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:23:49,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:49,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:23:49,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:23:49,173 INFO L87 Difference]: Start difference. First operand 17565 states and 61454 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:50,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:50,081 INFO L93 Difference]: Finished difference Result 35670 states and 119988 transitions. [2021-06-12 22:23:50,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:23:50,081 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:50,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:50,147 INFO L225 Difference]: With dead ends: 35670 [2021-06-12 22:23:50,147 INFO L226 Difference]: Without dead ends: 35670 [2021-06-12 22:23:50,148 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 575.0ms TimeCoverageRelationStatistics Valid=748, Invalid=2222, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 22:23:50,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35670 states. [2021-06-12 22:23:50,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35670 to 17384. [2021-06-12 22:23:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17384 states, 17383 states have (on average 3.49122706092159) internal successors, (60688), 17383 states have internal predecessors, (60688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:50,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17384 states to 17384 states and 60688 transitions. [2021-06-12 22:23:50,648 INFO L78 Accepts]: Start accepts. Automaton has 17384 states and 60688 transitions. Word has length 36 [2021-06-12 22:23:50,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:50,649 INFO L482 AbstractCegarLoop]: Abstraction has 17384 states and 60688 transitions. [2021-06-12 22:23:50,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:50,649 INFO L276 IsEmpty]: Start isEmpty. Operand 17384 states and 60688 transitions. [2021-06-12 22:23:50,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:50,673 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:50,673 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:50,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-12 22:23:50,873 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:50,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:50,873 INFO L82 PathProgramCache]: Analyzing trace with hash -530582264, now seen corresponding path program 128 times [2021-06-12 22:23:50,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:50,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309337209] [2021-06-12 22:23:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:50,937 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:50,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:50,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309337209] [2021-06-12 22:23:50,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309337209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:50,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580255320] [2021-06-12 22:23:50,937 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 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 22:23:50,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:23:50,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:50,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:23:50,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:23:51,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580255320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:51,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:51,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-12 22:23:51,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815971775] [2021-06-12 22:23:51,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 22:23:51,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:51,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 22:23:51,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:23:51,117 INFO L87 Difference]: Start difference. First operand 17384 states and 60688 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:54,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:54,489 INFO L93 Difference]: Finished difference Result 54535 states and 178905 transitions. [2021-06-12 22:23:54,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-06-12 22:23:54,490 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:54,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:54,596 INFO L225 Difference]: With dead ends: 54535 [2021-06-12 22:23:54,596 INFO L226 Difference]: Without dead ends: 54535 [2021-06-12 22:23:54,598 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12884 ImplicationChecksByTransitivity, 2485.8ms TimeCoverageRelationStatistics Valid=5153, Invalid=24603, Unknown=0, NotChecked=0, Total=29756 [2021-06-12 22:23:54,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54535 states. [2021-06-12 22:23:55,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54535 to 23450. [2021-06-12 22:23:55,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23450 states, 23449 states have (on average 3.4936671073393324) internal successors, (81923), 23449 states have internal predecessors, (81923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23450 states to 23450 states and 81923 transitions. [2021-06-12 22:23:55,553 INFO L78 Accepts]: Start accepts. Automaton has 23450 states and 81923 transitions. Word has length 36 [2021-06-12 22:23:55,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:23:55,553 INFO L482 AbstractCegarLoop]: Abstraction has 23450 states and 81923 transitions. [2021-06-12 22:23:55,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 23 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:55,553 INFO L276 IsEmpty]: Start isEmpty. Operand 23450 states and 81923 transitions. [2021-06-12 22:23:55,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:23:55,589 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:23:55,589 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:23:55,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-12 22:23:55,790 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:23:55,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:23:55,790 INFO L82 PathProgramCache]: Analyzing trace with hash 2079713946, now seen corresponding path program 129 times [2021-06-12 22:23:55,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:23:55,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523342986] [2021-06-12 22:23:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:23:55,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:23:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:23:56,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:23:56,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523342986] [2021-06-12 22:23:56,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523342986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:56,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485618127] [2021-06-12 22:23:56,028 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 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 22:23:56,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:23:56,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:23:56,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 22:23:56,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:23:56,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-06-12 22:23:56,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:56,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:56,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:56,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-12 22:23:56,255 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-06-12 22:23:56,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-06-12 22:23:56,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:56,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:56,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:23:56,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-12 22:23:56,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:56,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:56,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:23:56,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 36 [2021-06-12 22:23:56,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:23:56,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:23:56,332 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 1 xjuncts. [2021-06-12 22:23:56,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:47 [2021-06-12 22:23:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 22:23:56,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485618127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:23:56,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:23:56,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-06-12 22:23:56,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647150836] [2021-06-12 22:23:56,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 22:23:56,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:23:56,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 22:23:56,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:23:56,427 INFO L87 Difference]: Start difference. First operand 23450 states and 81923 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:23:59,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:23:59,535 INFO L93 Difference]: Finished difference Result 43833 states and 145969 transitions. [2021-06-12 22:23:59,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-06-12 22:23:59,535 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:23:59,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:23:59,616 INFO L225 Difference]: With dead ends: 43833 [2021-06-12 22:23:59,616 INFO L226 Difference]: Without dead ends: 43801 [2021-06-12 22:23:59,617 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6349 ImplicationChecksByTransitivity, 2555.0ms TimeCoverageRelationStatistics Valid=2492, Invalid=14278, Unknown=0, NotChecked=0, Total=16770 [2021-06-12 22:23:59,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43801 states. [2021-06-12 22:24:00,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43801 to 24220. [2021-06-12 22:24:00,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24220 states, 24219 states have (on average 3.4956852058301333) internal successors, (84662), 24219 states have internal predecessors, (84662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24220 states to 24220 states and 84662 transitions. [2021-06-12 22:24:00,422 INFO L78 Accepts]: Start accepts. Automaton has 24220 states and 84662 transitions. Word has length 36 [2021-06-12 22:24:00,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:00,422 INFO L482 AbstractCegarLoop]: Abstraction has 24220 states and 84662 transitions. [2021-06-12 22:24:00,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:00,422 INFO L276 IsEmpty]: Start isEmpty. Operand 24220 states and 84662 transitions. [2021-06-12 22:24:00,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:24:00,453 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:00,453 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:00,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:00,654 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:00,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:00,654 INFO L82 PathProgramCache]: Analyzing trace with hash -408762388, now seen corresponding path program 130 times [2021-06-12 22:24:00,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:00,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911695131] [2021-06-12 22:24:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:00,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:00,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911695131] [2021-06-12 22:24:00,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911695131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:00,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698626010] [2021-06-12 22:24:00,699 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 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 22:24:00,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:24:00,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:00,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:24:00,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:24:00,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698626010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:00,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:00,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 22:24:00,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019378721] [2021-06-12 22:24:00,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:24:00,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:00,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:24:00,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:24:00,920 INFO L87 Difference]: Start difference. First operand 24220 states and 84662 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:03,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:03,455 INFO L93 Difference]: Finished difference Result 58769 states and 199442 transitions. [2021-06-12 22:24:03,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-06-12 22:24:03,455 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:24:03,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:03,576 INFO L225 Difference]: With dead ends: 58769 [2021-06-12 22:24:03,577 INFO L226 Difference]: Without dead ends: 58705 [2021-06-12 22:24:03,577 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6795 ImplicationChecksByTransitivity, 1705.1ms TimeCoverageRelationStatistics Valid=2796, Invalid=13716, Unknown=0, NotChecked=0, Total=16512 [2021-06-12 22:24:03,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58705 states. [2021-06-12 22:24:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58705 to 25245. [2021-06-12 22:24:04,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25245 states, 25244 states have (on average 3.517627951196324) internal successors, (88799), 25244 states have internal predecessors, (88799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25245 states to 25245 states and 88799 transitions. [2021-06-12 22:24:04,437 INFO L78 Accepts]: Start accepts. Automaton has 25245 states and 88799 transitions. Word has length 36 [2021-06-12 22:24:04,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:04,437 INFO L482 AbstractCegarLoop]: Abstraction has 25245 states and 88799 transitions. [2021-06-12 22:24:04,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:04,437 INFO L276 IsEmpty]: Start isEmpty. Operand 25245 states and 88799 transitions. [2021-06-12 22:24:04,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:24:04,468 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:04,468 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:04,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-12 22:24:04,669 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:04,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:04,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1347426568, now seen corresponding path program 131 times [2021-06-12 22:24:04,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:04,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779495150] [2021-06-12 22:24:04,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:04,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:04,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779495150] [2021-06-12 22:24:04,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779495150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:04,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326806955] [2021-06-12 22:24:04,715 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 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 22:24:04,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:24:04,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:04,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:24:04,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:04,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326806955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:04,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:04,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-12 22:24:04,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426017681] [2021-06-12 22:24:04,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:24:04,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:04,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:24:04,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:24:04,896 INFO L87 Difference]: Start difference. First operand 25245 states and 88799 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:05,171 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2021-06-12 22:24:05,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:05,794 INFO L93 Difference]: Finished difference Result 57930 states and 199300 transitions. [2021-06-12 22:24:05,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:24:05,795 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:24:05,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:05,920 INFO L225 Difference]: With dead ends: 57930 [2021-06-12 22:24:05,920 INFO L226 Difference]: Without dead ends: 57930 [2021-06-12 22:24:05,921 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 459.9ms TimeCoverageRelationStatistics Valid=401, Invalid=1081, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:24:05,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57930 states. [2021-06-12 22:24:06,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57930 to 26000. [2021-06-12 22:24:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26000 states, 25999 states have (on average 3.5369821916227546) internal successors, (91958), 25999 states have internal predecessors, (91958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:06,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26000 states to 26000 states and 91958 transitions. [2021-06-12 22:24:06,978 INFO L78 Accepts]: Start accepts. Automaton has 26000 states and 91958 transitions. Word has length 36 [2021-06-12 22:24:06,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:06,978 INFO L482 AbstractCegarLoop]: Abstraction has 26000 states and 91958 transitions. [2021-06-12 22:24:06,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:06,978 INFO L276 IsEmpty]: Start isEmpty. Operand 26000 states and 91958 transitions. [2021-06-12 22:24:07,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:24:07,013 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:07,013 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:07,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:07,222 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:07,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:07,222 INFO L82 PathProgramCache]: Analyzing trace with hash 339853380, now seen corresponding path program 132 times [2021-06-12 22:24:07,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:07,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248105180] [2021-06-12 22:24:07,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:07,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:07,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248105180] [2021-06-12 22:24:07,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248105180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:07,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008483283] [2021-06-12 22:24:07,271 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 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 22:24:07,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:24:07,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:07,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:24:07,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:24:07,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008483283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:07,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:07,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-12 22:24:07,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543918511] [2021-06-12 22:24:07,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:24:07,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:07,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:24:07,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:24:07,459 INFO L87 Difference]: Start difference. First operand 26000 states and 91958 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:10,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:10,144 INFO L93 Difference]: Finished difference Result 60488 states and 206164 transitions. [2021-06-12 22:24:10,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-06-12 22:24:10,144 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:24:10,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:10,283 INFO L225 Difference]: With dead ends: 60488 [2021-06-12 22:24:10,283 INFO L226 Difference]: Without dead ends: 60488 [2021-06-12 22:24:10,283 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6645 ImplicationChecksByTransitivity, 1872.4ms TimeCoverageRelationStatistics Valid=3256, Invalid=12746, Unknown=0, NotChecked=0, Total=16002 [2021-06-12 22:24:10,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60488 states. [2021-06-12 22:24:11,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60488 to 26680. [2021-06-12 22:24:11,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26680 states, 26679 states have (on average 3.5661756437647587) internal successors, (95142), 26679 states have internal predecessors, (95142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:11,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26680 states to 26680 states and 95142 transitions. [2021-06-12 22:24:11,243 INFO L78 Accepts]: Start accepts. Automaton has 26680 states and 95142 transitions. Word has length 36 [2021-06-12 22:24:11,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:11,243 INFO L482 AbstractCegarLoop]: Abstraction has 26680 states and 95142 transitions. [2021-06-12 22:24:11,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:11,243 INFO L276 IsEmpty]: Start isEmpty. Operand 26680 states and 95142 transitions. [2021-06-12 22:24:11,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:24:11,282 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:11,282 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:11,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:11,483 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:11,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:11,483 INFO L82 PathProgramCache]: Analyzing trace with hash -710764454, now seen corresponding path program 133 times [2021-06-12 22:24:11,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:11,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917952289] [2021-06-12 22:24:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:11,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:11,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:11,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917952289] [2021-06-12 22:24:11,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917952289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:11,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409245976] [2021-06-12 22:24:11,529 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 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 22:24:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:11,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:24:11,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:24:11,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409245976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:11,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:11,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 22:24:11,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351402214] [2021-06-12 22:24:11,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:24:11,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:11,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:24:11,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:24:11,920 INFO L87 Difference]: Start difference. First operand 26680 states and 95142 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:13,456 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-12 22:24:13,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:13,626 INFO L93 Difference]: Finished difference Result 57569 states and 197823 transitions. [2021-06-12 22:24:13,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-12 22:24:13,626 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:24:13,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:13,745 INFO L225 Difference]: With dead ends: 57569 [2021-06-12 22:24:13,746 INFO L226 Difference]: Without dead ends: 57521 [2021-06-12 22:24:13,746 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2543 ImplicationChecksByTransitivity, 1226.8ms TimeCoverageRelationStatistics Valid=1427, Invalid=5379, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 22:24:13,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57521 states. [2021-06-12 22:24:14,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57521 to 26690. [2021-06-12 22:24:14,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26690 states, 26689 states have (on average 3.5660009741841208) internal successors, (95173), 26689 states have internal predecessors, (95173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26690 states to 26690 states and 95173 transitions. [2021-06-12 22:24:14,614 INFO L78 Accepts]: Start accepts. Automaton has 26690 states and 95173 transitions. Word has length 36 [2021-06-12 22:24:14,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:14,614 INFO L482 AbstractCegarLoop]: Abstraction has 26690 states and 95173 transitions. [2021-06-12 22:24:14,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:14,614 INFO L276 IsEmpty]: Start isEmpty. Operand 26690 states and 95173 transitions. [2021-06-12 22:24:14,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:24:14,657 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:14,657 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:14,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-06-12 22:24:14,857 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:14,857 INFO L82 PathProgramCache]: Analyzing trace with hash 329516758, now seen corresponding path program 134 times [2021-06-12 22:24:14,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:14,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152885767] [2021-06-12 22:24:14,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:14,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:14,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152885767] [2021-06-12 22:24:14,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152885767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:14,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201079034] [2021-06-12 22:24:14,911 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 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 22:24:14,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:24:14,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:14,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:24:14,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:15,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201079034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:15,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:15,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-12 22:24:15,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461833165] [2021-06-12 22:24:15,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:24:15,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:15,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:24:15,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:24:15,078 INFO L87 Difference]: Start difference. First operand 26690 states and 95173 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:16,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:16,023 INFO L93 Difference]: Finished difference Result 57984 states and 198618 transitions. [2021-06-12 22:24:16,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:24:16,024 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:24:16,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:16,160 INFO L225 Difference]: With dead ends: 57984 [2021-06-12 22:24:16,160 INFO L226 Difference]: Without dead ends: 57984 [2021-06-12 22:24:16,160 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 342.7ms TimeCoverageRelationStatistics Valid=474, Invalid=1248, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:24:16,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57984 states. [2021-06-12 22:24:17,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57984 to 27762. [2021-06-12 22:24:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27762 states, 27761 states have (on average 3.5949353409459315) internal successors, (99799), 27761 states have internal predecessors, (99799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:17,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27762 states to 27762 states and 99799 transitions. [2021-06-12 22:24:17,345 INFO L78 Accepts]: Start accepts. Automaton has 27762 states and 99799 transitions. Word has length 36 [2021-06-12 22:24:17,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:17,345 INFO L482 AbstractCegarLoop]: Abstraction has 27762 states and 99799 transitions. [2021-06-12 22:24:17,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:17,345 INFO L276 IsEmpty]: Start isEmpty. Operand 27762 states and 99799 transitions. [2021-06-12 22:24:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:24:17,385 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:17,385 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:17,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:17,586 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:17,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:17,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1122382768, now seen corresponding path program 135 times [2021-06-12 22:24:17,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:17,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749007466] [2021-06-12 22:24:17,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:24:17,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:17,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749007466] [2021-06-12 22:24:17,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749007466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:17,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39294892] [2021-06-12 22:24:17,636 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 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 22:24:17,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:24:17,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:17,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:24:17,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:17,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39294892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:17,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:17,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 18 [2021-06-12 22:24:17,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488411968] [2021-06-12 22:24:17,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:17,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:17,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:17,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:17,779 INFO L87 Difference]: Start difference. First operand 27762 states and 99799 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:19,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:19,025 INFO L93 Difference]: Finished difference Result 54138 states and 184921 transitions. [2021-06-12 22:24:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 22:24:19,025 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:24:19,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:19,146 INFO L225 Difference]: With dead ends: 54138 [2021-06-12 22:24:19,146 INFO L226 Difference]: Without dead ends: 54066 [2021-06-12 22:24:19,147 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 610.9ms TimeCoverageRelationStatistics Valid=855, Invalid=3435, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 22:24:19,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54066 states. [2021-06-12 22:24:20,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54066 to 27784. [2021-06-12 22:24:20,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27784 states, 27783 states have (on average 3.5943562610229276) internal successors, (99862), 27783 states have internal predecessors, (99862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27784 states to 27784 states and 99862 transitions. [2021-06-12 22:24:20,497 INFO L78 Accepts]: Start accepts. Automaton has 27784 states and 99862 transitions. Word has length 36 [2021-06-12 22:24:20,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:20,497 INFO L482 AbstractCegarLoop]: Abstraction has 27784 states and 99862 transitions. [2021-06-12 22:24:20,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:20,497 INFO L276 IsEmpty]: Start isEmpty. Operand 27784 states and 99862 transitions. [2021-06-12 22:24:20,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:24:20,538 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:20,538 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:20,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:20,739 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:20,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:20,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1700283596, now seen corresponding path program 136 times [2021-06-12 22:24:20,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:20,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191178372] [2021-06-12 22:24:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:24:20,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:20,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191178372] [2021-06-12 22:24:20,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191178372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:20,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369219112] [2021-06-12 22:24:20,792 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 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 22:24:20,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:24:20,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:20,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:24:20,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:24:20,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369219112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:20,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:20,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 22:24:20,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391061574] [2021-06-12 22:24:20,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:24:20,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:20,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:24:20,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:24:20,938 INFO L87 Difference]: Start difference. First operand 27784 states and 99862 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:23,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:23,043 INFO L93 Difference]: Finished difference Result 59804 states and 200815 transitions. [2021-06-12 22:24:23,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-06-12 22:24:23,043 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:24:23,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:23,168 INFO L225 Difference]: With dead ends: 59804 [2021-06-12 22:24:23,168 INFO L226 Difference]: Without dead ends: 59804 [2021-06-12 22:24:23,169 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5826 ImplicationChecksByTransitivity, 1361.2ms TimeCoverageRelationStatistics Valid=2466, Invalid=11576, Unknown=0, NotChecked=0, Total=14042 [2021-06-12 22:24:23,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59804 states. [2021-06-12 22:24:24,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59804 to 27938. [2021-06-12 22:24:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27938 states, 27937 states have (on average 3.5910441350180764) internal successors, (100323), 27937 states have internal predecessors, (100323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27938 states to 27938 states and 100323 transitions. [2021-06-12 22:24:24,140 INFO L78 Accepts]: Start accepts. Automaton has 27938 states and 100323 transitions. Word has length 36 [2021-06-12 22:24:24,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:24,140 INFO L482 AbstractCegarLoop]: Abstraction has 27938 states and 100323 transitions. [2021-06-12 22:24:24,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 27938 states and 100323 transitions. [2021-06-12 22:24:24,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:24:24,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:24,181 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:24,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-12 22:24:24,382 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:24,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:24,382 INFO L82 PathProgramCache]: Analyzing trace with hash -2038937164, now seen corresponding path program 137 times [2021-06-12 22:24:24,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:24,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367800839] [2021-06-12 22:24:24,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:24,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:24,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367800839] [2021-06-12 22:24:24,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367800839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:24,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135884853] [2021-06-12 22:24:24,443 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 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 22:24:24,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:24:24,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:24,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:24:24,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:24,702 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-12 22:24:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:24,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135884853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:24,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:24,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-06-12 22:24:24,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7144863] [2021-06-12 22:24:24,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:24,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:24,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:24,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:24,784 INFO L87 Difference]: Start difference. First operand 27938 states and 100323 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:26,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:26,253 INFO L93 Difference]: Finished difference Result 55738 states and 189163 transitions. [2021-06-12 22:24:26,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-12 22:24:26,253 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:24:26,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:26,386 INFO L225 Difference]: With dead ends: 55738 [2021-06-12 22:24:26,386 INFO L226 Difference]: Without dead ends: 55594 [2021-06-12 22:24:26,387 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 955.6ms TimeCoverageRelationStatistics Valid=1122, Invalid=4884, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 22:24:26,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55594 states. [2021-06-12 22:24:27,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55594 to 27966. [2021-06-12 22:24:27,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27966 states, 27965 states have (on average 3.5902377972465582) internal successors, (100401), 27965 states have internal predecessors, (100401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:27,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27966 states to 27966 states and 100401 transitions. [2021-06-12 22:24:27,330 INFO L78 Accepts]: Start accepts. Automaton has 27966 states and 100401 transitions. Word has length 36 [2021-06-12 22:24:27,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:27,330 INFO L482 AbstractCegarLoop]: Abstraction has 27966 states and 100401 transitions. [2021-06-12 22:24:27,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:27,330 INFO L276 IsEmpty]: Start isEmpty. Operand 27966 states and 100401 transitions. [2021-06-12 22:24:27,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:24:27,368 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:27,368 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:27,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-12 22:24:27,569 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:27,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:27,569 INFO L82 PathProgramCache]: Analyzing trace with hash -201981896, now seen corresponding path program 138 times [2021-06-12 22:24:27,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:27,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078599373] [2021-06-12 22:24:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:27,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:27,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078599373] [2021-06-12 22:24:27,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078599373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:27,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408118008] [2021-06-12 22:24:27,620 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 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 22:24:27,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:24:27,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:27,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:24:27,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:24:27,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408118008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:27,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:27,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-12 22:24:27,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22706854] [2021-06-12 22:24:27,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:27,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:27,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:27,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:27,774 INFO L87 Difference]: Start difference. First operand 27966 states and 100401 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:29,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:29,730 INFO L93 Difference]: Finished difference Result 58306 states and 196728 transitions. [2021-06-12 22:24:29,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-12 22:24:29,730 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:24:29,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:29,852 INFO L225 Difference]: With dead ends: 58306 [2021-06-12 22:24:29,852 INFO L226 Difference]: Without dead ends: 58238 [2021-06-12 22:24:29,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3796 ImplicationChecksByTransitivity, 1208.2ms TimeCoverageRelationStatistics Valid=1816, Invalid=7886, Unknown=0, NotChecked=0, Total=9702 [2021-06-12 22:24:29,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58238 states. [2021-06-12 22:24:30,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58238 to 28222. [2021-06-12 22:24:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28222 states, 28221 states have (on average 3.5836788207363313) internal successors, (101135), 28221 states have internal predecessors, (101135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:30,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28222 states to 28222 states and 101135 transitions. [2021-06-12 22:24:30,820 INFO L78 Accepts]: Start accepts. Automaton has 28222 states and 101135 transitions. Word has length 36 [2021-06-12 22:24:30,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:30,820 INFO L482 AbstractCegarLoop]: Abstraction has 28222 states and 101135 transitions. [2021-06-12 22:24:30,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:30,820 INFO L276 IsEmpty]: Start isEmpty. Operand 28222 states and 101135 transitions. [2021-06-12 22:24:30,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:24:30,859 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:30,859 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:31,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-12 22:24:31,059 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:31,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:31,060 INFO L82 PathProgramCache]: Analyzing trace with hash 838299316, now seen corresponding path program 139 times [2021-06-12 22:24:31,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:31,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271786635] [2021-06-12 22:24:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:31,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:31,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271786635] [2021-06-12 22:24:31,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271786635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:31,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070342324] [2021-06-12 22:24:31,112 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 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 22:24:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:31,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:24:31,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:31,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070342324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:31,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:31,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-06-12 22:24:31,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971570663] [2021-06-12 22:24:31,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:31,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:31,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:31,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:31,246 INFO L87 Difference]: Start difference. First operand 28222 states and 101135 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:32,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:32,597 INFO L93 Difference]: Finished difference Result 58747 states and 196828 transitions. [2021-06-12 22:24:32,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:24:32,597 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:24:32,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:32,715 INFO L225 Difference]: With dead ends: 58747 [2021-06-12 22:24:32,715 INFO L226 Difference]: Without dead ends: 58747 [2021-06-12 22:24:32,715 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 571.8ms TimeCoverageRelationStatistics Valid=896, Invalid=2886, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:24:32,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58747 states. [2021-06-12 22:24:33,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58747 to 28292. [2021-06-12 22:24:33,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28292 states, 28291 states have (on average 3.583259693895585) internal successors, (101374), 28291 states have internal predecessors, (101374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:33,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28292 states to 28292 states and 101374 transitions. [2021-06-12 22:24:33,665 INFO L78 Accepts]: Start accepts. Automaton has 28292 states and 101374 transitions. Word has length 36 [2021-06-12 22:24:33,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:33,665 INFO L482 AbstractCegarLoop]: Abstraction has 28292 states and 101374 transitions. [2021-06-12 22:24:33,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:33,665 INFO L276 IsEmpty]: Start isEmpty. Operand 28292 states and 101374 transitions. [2021-06-12 22:24:33,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:24:33,704 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:33,704 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:33,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:33,905 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:33,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:33,905 INFO L82 PathProgramCache]: Analyzing trace with hash 769453752, now seen corresponding path program 140 times [2021-06-12 22:24:33,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:33,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505320021] [2021-06-12 22:24:33,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:33,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:33,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505320021] [2021-06-12 22:24:33,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505320021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:33,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664407559] [2021-06-12 22:24:33,967 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 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 22:24:33,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:24:33,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:33,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:24:33,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:24:34,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664407559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:34,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:34,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-06-12 22:24:34,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718667036] [2021-06-12 22:24:34,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:34,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:34,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:34,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:34,086 INFO L87 Difference]: Start difference. First operand 28292 states and 101374 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:35,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:35,912 INFO L93 Difference]: Finished difference Result 58143 states and 196081 transitions. [2021-06-12 22:24:35,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-12 22:24:35,913 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:24:35,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:36,045 INFO L225 Difference]: With dead ends: 58143 [2021-06-12 22:24:36,045 INFO L226 Difference]: Without dead ends: 57927 [2021-06-12 22:24:36,046 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3120 ImplicationChecksByTransitivity, 1000.6ms TimeCoverageRelationStatistics Valid=1531, Invalid=7211, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 22:24:36,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57927 states. [2021-06-12 22:24:36,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57927 to 28406. [2021-06-12 22:24:36,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28406 states, 28405 states have (on average 3.5803907762717833) internal successors, (101701), 28405 states have internal predecessors, (101701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28406 states to 28406 states and 101701 transitions. [2021-06-12 22:24:37,021 INFO L78 Accepts]: Start accepts. Automaton has 28406 states and 101701 transitions. Word has length 36 [2021-06-12 22:24:37,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:37,022 INFO L482 AbstractCegarLoop]: Abstraction has 28406 states and 101701 transitions. [2021-06-12 22:24:37,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:37,022 INFO L276 IsEmpty]: Start isEmpty. Operand 28406 states and 101701 transitions. [2021-06-12 22:24:37,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:24:37,060 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:37,060 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:37,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-12 22:24:37,261 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:37,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:37,261 INFO L82 PathProgramCache]: Analyzing trace with hash 851907644, now seen corresponding path program 141 times [2021-06-12 22:24:37,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:37,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963862932] [2021-06-12 22:24:37,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:37,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:37,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963862932] [2021-06-12 22:24:37,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963862932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:37,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978668721] [2021-06-12 22:24:37,321 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 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 22:24:37,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:24:37,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:37,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:24:37,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:37,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978668721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:37,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:37,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-12 22:24:37,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050084972] [2021-06-12 22:24:37,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:24:37,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:37,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:24:37,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:24:37,447 INFO L87 Difference]: Start difference. First operand 28406 states and 101701 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:38,070 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-12 22:24:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:39,387 INFO L93 Difference]: Finished difference Result 56244 states and 191794 transitions. [2021-06-12 22:24:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-12 22:24:39,387 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:24:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:39,504 INFO L225 Difference]: With dead ends: 56244 [2021-06-12 22:24:39,504 INFO L226 Difference]: Without dead ends: 56088 [2021-06-12 22:24:39,505 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3741 ImplicationChecksByTransitivity, 1213.5ms TimeCoverageRelationStatistics Valid=1746, Invalid=8154, Unknown=0, NotChecked=0, Total=9900 [2021-06-12 22:24:39,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56088 states. [2021-06-12 22:24:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56088 to 28858. [2021-06-12 22:24:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28858 states, 28857 states have (on average 3.5620819905049035) internal successors, (102791), 28857 states have internal predecessors, (102791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:40,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28858 states to 28858 states and 102791 transitions. [2021-06-12 22:24:40,517 INFO L78 Accepts]: Start accepts. Automaton has 28858 states and 102791 transitions. Word has length 36 [2021-06-12 22:24:40,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:40,517 INFO L482 AbstractCegarLoop]: Abstraction has 28858 states and 102791 transitions. [2021-06-12 22:24:40,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:40,517 INFO L276 IsEmpty]: Start isEmpty. Operand 28858 states and 102791 transitions. [2021-06-12 22:24:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:24:40,558 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:40,558 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:40,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:40,759 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:40,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:40,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1657232324, now seen corresponding path program 142 times [2021-06-12 22:24:40,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:40,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571122966] [2021-06-12 22:24:40,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:40,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:40,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571122966] [2021-06-12 22:24:40,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571122966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:40,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61825806] [2021-06-12 22:24:40,819 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 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 22:24:40,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:24:40,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:40,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:24:40,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:24:40,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61825806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:40,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:40,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-12 22:24:40,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186360377] [2021-06-12 22:24:40,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:24:40,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:40,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:24:40,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:24:40,944 INFO L87 Difference]: Start difference. First operand 28858 states and 102791 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:43,878 INFO L93 Difference]: Finished difference Result 62328 states and 208262 transitions. [2021-06-12 22:24:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2021-06-12 22:24:43,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:24:43,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:44,012 INFO L225 Difference]: With dead ends: 62328 [2021-06-12 22:24:44,012 INFO L226 Difference]: Without dead ends: 62328 [2021-06-12 22:24:44,013 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10889 ImplicationChecksByTransitivity, 1980.8ms TimeCoverageRelationStatistics Valid=4101, Invalid=20705, Unknown=0, NotChecked=0, Total=24806 [2021-06-12 22:24:44,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62328 states. [2021-06-12 22:24:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62328 to 31970. [2021-06-12 22:24:45,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31970 states, 31969 states have (on average 3.5039882386061496) internal successors, (112019), 31969 states have internal predecessors, (112019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:45,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31970 states to 31970 states and 112019 transitions. [2021-06-12 22:24:45,101 INFO L78 Accepts]: Start accepts. Automaton has 31970 states and 112019 transitions. Word has length 36 [2021-06-12 22:24:45,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:45,101 INFO L482 AbstractCegarLoop]: Abstraction has 31970 states and 112019 transitions. [2021-06-12 22:24:45,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:45,102 INFO L276 IsEmpty]: Start isEmpty. Operand 31970 states and 112019 transitions. [2021-06-12 22:24:45,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:24:45,144 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:45,144 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:45,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:45,345 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:45,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:45,345 INFO L82 PathProgramCache]: Analyzing trace with hash 894177490, now seen corresponding path program 143 times [2021-06-12 22:24:45,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:45,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726228719] [2021-06-12 22:24:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:45,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:45,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726228719] [2021-06-12 22:24:45,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726228719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:45,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924541913] [2021-06-12 22:24:45,404 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 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 22:24:45,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:24:45,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:45,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:24:45,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:24:45,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924541913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:45,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:45,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-12 22:24:45,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699903042] [2021-06-12 22:24:45,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:24:45,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:45,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:24:45,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:24:45,560 INFO L87 Difference]: Start difference. First operand 31970 states and 112019 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:46,307 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2021-06-12 22:24:47,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:47,383 INFO L93 Difference]: Finished difference Result 58961 states and 202100 transitions. [2021-06-12 22:24:47,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 22:24:47,384 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:24:47,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:47,508 INFO L225 Difference]: With dead ends: 58961 [2021-06-12 22:24:47,508 INFO L226 Difference]: Without dead ends: 58937 [2021-06-12 22:24:47,509 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2552 ImplicationChecksByTransitivity, 1071.6ms TimeCoverageRelationStatistics Valid=1411, Invalid=5561, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 22:24:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58937 states. [2021-06-12 22:24:48,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58937 to 33178. [2021-06-12 22:24:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33178 states, 33177 states have (on average 3.5047774060343007) internal successors, (116278), 33177 states have internal predecessors, (116278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33178 states to 33178 states and 116278 transitions. [2021-06-12 22:24:48,431 INFO L78 Accepts]: Start accepts. Automaton has 33178 states and 116278 transitions. Word has length 36 [2021-06-12 22:24:48,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:48,431 INFO L482 AbstractCegarLoop]: Abstraction has 33178 states and 116278 transitions. [2021-06-12 22:24:48,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:48,431 INFO L276 IsEmpty]: Start isEmpty. Operand 33178 states and 116278 transitions. [2021-06-12 22:24:48,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:24:48,670 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:48,670 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:48,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:48,871 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:48,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:48,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1472010922, now seen corresponding path program 144 times [2021-06-12 22:24:48,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:48,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146030996] [2021-06-12 22:24:48,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:48,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:48,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146030996] [2021-06-12 22:24:48,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146030996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:48,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376819678] [2021-06-12 22:24:48,917 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 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 22:24:48,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:24:48,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:48,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:24:48,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:49,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376819678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:49,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:49,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 22:24:49,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523203944] [2021-06-12 22:24:49,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:24:49,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:49,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:24:49,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:24:49,069 INFO L87 Difference]: Start difference. First operand 33178 states and 116278 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:50,650 INFO L93 Difference]: Finished difference Result 61380 states and 207685 transitions. [2021-06-12 22:24:50,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 22:24:50,650 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:24:50,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:50,784 INFO L225 Difference]: With dead ends: 61380 [2021-06-12 22:24:50,784 INFO L226 Difference]: Without dead ends: 61356 [2021-06-12 22:24:50,785 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2596 ImplicationChecksByTransitivity, 1010.4ms TimeCoverageRelationStatistics Valid=1508, Invalid=5464, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 22:24:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61356 states. [2021-06-12 22:24:51,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61356 to 33587. [2021-06-12 22:24:51,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33587 states, 33586 states have (on average 3.5085750014887154) internal successors, (117839), 33586 states have internal predecessors, (117839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:51,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33587 states to 33587 states and 117839 transitions. [2021-06-12 22:24:51,871 INFO L78 Accepts]: Start accepts. Automaton has 33587 states and 117839 transitions. Word has length 36 [2021-06-12 22:24:51,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:51,871 INFO L482 AbstractCegarLoop]: Abstraction has 33587 states and 117839 transitions. [2021-06-12 22:24:51,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:51,871 INFO L276 IsEmpty]: Start isEmpty. Operand 33587 states and 117839 transitions. [2021-06-12 22:24:51,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:24:51,917 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:51,918 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:52,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:24:52,118 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:52,118 INFO L82 PathProgramCache]: Analyzing trace with hash 44374, now seen corresponding path program 145 times [2021-06-12 22:24:52,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:52,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064819241] [2021-06-12 22:24:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:52,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:52,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064819241] [2021-06-12 22:24:52,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064819241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:52,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765114127] [2021-06-12 22:24:52,168 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 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 22:24:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:52,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:24:52,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:24:52,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765114127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:52,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:52,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 22:24:52,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124833688] [2021-06-12 22:24:52,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:24:52,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:52,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:24:52,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:24:52,483 INFO L87 Difference]: Start difference. First operand 33587 states and 117839 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:54,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:54,529 INFO L93 Difference]: Finished difference Result 68170 states and 230143 transitions. [2021-06-12 22:24:54,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-12 22:24:54,529 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:24:54,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:54,674 INFO L225 Difference]: With dead ends: 68170 [2021-06-12 22:24:54,674 INFO L226 Difference]: Without dead ends: 68134 [2021-06-12 22:24:54,675 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4640 ImplicationChecksByTransitivity, 1535.5ms TimeCoverageRelationStatistics Valid=2536, Invalid=9236, Unknown=0, NotChecked=0, Total=11772 [2021-06-12 22:24:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68134 states. [2021-06-12 22:24:55,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68134 to 33436. [2021-06-12 22:24:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33436 states, 33435 states have (on average 3.5040526394496783) internal successors, (117158), 33435 states have internal predecessors, (117158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33436 states to 33436 states and 117158 transitions. [2021-06-12 22:24:55,915 INFO L78 Accepts]: Start accepts. Automaton has 33436 states and 117158 transitions. Word has length 36 [2021-06-12 22:24:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:55,915 INFO L482 AbstractCegarLoop]: Abstraction has 33436 states and 117158 transitions. [2021-06-12 22:24:55,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 33436 states and 117158 transitions. [2021-06-12 22:24:55,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:24:55,959 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:55,960 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:56,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-06-12 22:24:56,160 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:56,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:56,160 INFO L82 PathProgramCache]: Analyzing trace with hash -988740176, now seen corresponding path program 146 times [2021-06-12 22:24:56,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:56,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376088765] [2021-06-12 22:24:56,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:56,221 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:56,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:56,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376088765] [2021-06-12 22:24:56,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376088765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:56,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679993026] [2021-06-12 22:24:56,221 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 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 22:24:56,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:24:56,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:56,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:24:56,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:24:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:24:56,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679993026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:56,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:24:56,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 22:24:56,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009937231] [2021-06-12 22:24:56,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:24:56,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:24:56,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:24:56,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:24:56,378 INFO L87 Difference]: Start difference. First operand 33436 states and 117158 transitions. Second operand has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:58,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:24:58,123 INFO L93 Difference]: Finished difference Result 71028 states and 243828 transitions. [2021-06-12 22:24:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-12 22:24:58,124 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:24:58,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:24:58,427 INFO L225 Difference]: With dead ends: 71028 [2021-06-12 22:24:58,428 INFO L226 Difference]: Without dead ends: 70956 [2021-06-12 22:24:58,428 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3221 ImplicationChecksByTransitivity, 1117.1ms TimeCoverageRelationStatistics Valid=1558, Invalid=7184, Unknown=0, NotChecked=0, Total=8742 [2021-06-12 22:24:58,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70956 states. [2021-06-12 22:24:59,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70956 to 33879. [2021-06-12 22:24:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33879 states, 33878 states have (on average 3.507792667808017) internal successors, (118837), 33878 states have internal predecessors, (118837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33879 states to 33879 states and 118837 transitions. [2021-06-12 22:24:59,608 INFO L78 Accepts]: Start accepts. Automaton has 33879 states and 118837 transitions. Word has length 36 [2021-06-12 22:24:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:24:59,608 INFO L482 AbstractCegarLoop]: Abstraction has 33879 states and 118837 transitions. [2021-06-12 22:24:59,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:24:59,608 INFO L276 IsEmpty]: Start isEmpty. Operand 33879 states and 118837 transitions. [2021-06-12 22:24:59,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:24:59,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:24:59,654 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:24:59,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-12 22:24:59,855 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:24:59,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:24:59,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1272413260, now seen corresponding path program 147 times [2021-06-12 22:24:59,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:24:59,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681270311] [2021-06-12 22:24:59,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:24:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:24:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:24:59,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:24:59,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681270311] [2021-06-12 22:24:59,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681270311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:24:59,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759166974] [2021-06-12 22:24:59,927 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 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 22:24:59,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:24:59,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:24:59,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:24:59,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:00,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759166974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:00,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:00,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 22:25:00,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943145623] [2021-06-12 22:25:00,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:25:00,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:00,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:25:00,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:25:00,099 INFO L87 Difference]: Start difference. First operand 33879 states and 118837 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:01,896 INFO L93 Difference]: Finished difference Result 72468 states and 247783 transitions. [2021-06-12 22:25:01,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-12 22:25:01,896 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:25:01,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:02,225 INFO L225 Difference]: With dead ends: 72468 [2021-06-12 22:25:02,225 INFO L226 Difference]: Without dead ends: 72348 [2021-06-12 22:25:02,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3012 ImplicationChecksByTransitivity, 1132.8ms TimeCoverageRelationStatistics Valid=1503, Invalid=6869, Unknown=0, NotChecked=0, Total=8372 [2021-06-12 22:25:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72348 states. [2021-06-12 22:25:03,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72348 to 36408. [2021-06-12 22:25:03,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36408 states, 36407 states have (on average 3.501606833850633) internal successors, (127483), 36407 states have internal predecessors, (127483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36408 states to 36408 states and 127483 transitions. [2021-06-12 22:25:03,498 INFO L78 Accepts]: Start accepts. Automaton has 36408 states and 127483 transitions. Word has length 36 [2021-06-12 22:25:03,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:03,498 INFO L482 AbstractCegarLoop]: Abstraction has 36408 states and 127483 transitions. [2021-06-12 22:25:03,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:03,498 INFO L276 IsEmpty]: Start isEmpty. Operand 36408 states and 127483 transitions. [2021-06-12 22:25:03,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:25:03,549 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:03,549 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:03,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-12 22:25:03,750 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:03,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:03,750 INFO L82 PathProgramCache]: Analyzing trace with hash 995659960, now seen corresponding path program 148 times [2021-06-12 22:25:03,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:03,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73206390] [2021-06-12 22:25:03,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:03,823 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:03,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:03,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73206390] [2021-06-12 22:25:03,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73206390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:03,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242444910] [2021-06-12 22:25:03,824 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 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 22:25:03,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:25:03,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:03,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:25:03,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:25:03,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242444910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:03,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:03,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-12 22:25:03,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801740921] [2021-06-12 22:25:03,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:25:03,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:03,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:25:03,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:25:03,978 INFO L87 Difference]: Start difference. First operand 36408 states and 127483 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:05,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:25:05,754 INFO L93 Difference]: Finished difference Result 71896 states and 245531 transitions. [2021-06-12 22:25:05,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 22:25:05,755 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 22:25:05,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:25:06,091 INFO L225 Difference]: With dead ends: 71896 [2021-06-12 22:25:06,092 INFO L226 Difference]: Without dead ends: 71728 [2021-06-12 22:25:06,092 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2683 ImplicationChecksByTransitivity, 1138.8ms TimeCoverageRelationStatistics Valid=1382, Invalid=6274, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 22:25:06,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71728 states. [2021-06-12 22:25:07,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71728 to 37315. [2021-06-12 22:25:07,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37315 states, 37314 states have (on average 3.4974272391059658) internal successors, (130503), 37314 states have internal predecessors, (130503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37315 states to 37315 states and 130503 transitions. [2021-06-12 22:25:07,376 INFO L78 Accepts]: Start accepts. Automaton has 37315 states and 130503 transitions. Word has length 36 [2021-06-12 22:25:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:25:07,376 INFO L482 AbstractCegarLoop]: Abstraction has 37315 states and 130503 transitions. [2021-06-12 22:25:07,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:25:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 37315 states and 130503 transitions. [2021-06-12 22:25:07,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 22:25:07,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:25:07,427 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:25:07,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-12 22:25:07,628 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:25:07,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:25:07,628 INFO L82 PathProgramCache]: Analyzing trace with hash 652323388, now seen corresponding path program 149 times [2021-06-12 22:25:07,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:25:07,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609986925] [2021-06-12 22:25:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:25:07,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:25:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:07,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:25:07,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609986925] [2021-06-12 22:25:07,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609986925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:07,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618035241] [2021-06-12 22:25:07,686 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 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 22:25:07,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:25:07,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:25:07,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:25:07,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:25:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:25:07,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618035241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:25:07,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:25:07,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-12 22:25:07,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163656353] [2021-06-12 22:25:07,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:25:07,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:25:07,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:25:07,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:25:07,878 INFO L87 Difference]: Start difference. First operand 37315 states and 130503 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)