/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/counter-determinism.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:50:10,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:50:10,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:50:10,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 20:50:10,617 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 20:50:10,654 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:50:10,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:50:10,655 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:50:10,655 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:50:10,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:50:10,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:50:10,658 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:50:10,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:50:10,659 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:50:10,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:50:10,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:50:10,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:50:10,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:50:10,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:50:10,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:50:10,660 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:50:10,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:50:10,661 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:50:10,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:50:10,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:50:10,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:50:10,661 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:50:10,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:50:10,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:50:10,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:50:10,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:50:10,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:50:10,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:50:10,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:50:10,662 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:50:10,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:50:10,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:50:10,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:50:10,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:50:10,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:50:10,970 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:50:10,971 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:50:10,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl [2021-06-12 20:50:10,972 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl' [2021-06-12 20:50:11,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:50:11,010 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:50:11,013 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:50:11,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:50:11,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:50:11,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:50:11" (1/1) ... [2021-06-12 20:50:11,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:50:11" (1/1) ... [2021-06-12 20:50:11,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:50:11,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:50:11,042 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:50:11,042 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:50:11,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:50:11" (1/1) ... [2021-06-12 20:50:11,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:50:11" (1/1) ... [2021-06-12 20:50:11,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:50:11" (1/1) ... [2021-06-12 20:50:11,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:50:11" (1/1) ... [2021-06-12 20:50:11,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:50:11" (1/1) ... [2021-06-12 20:50:11,059 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:50:11" (1/1) ... [2021-06-12 20:50:11,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:50:11" (1/1) ... [2021-06-12 20:50:11,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:50:11,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:50:11,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:50:11,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:50:11,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:50:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:50:11,130 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:50:11,131 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:50:11,131 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:50:11,131 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:50:11,131 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:50:11,131 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:50:11,131 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:50:11,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:50:11,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:50:11,132 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 20:50:11,132 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 20:50:11,132 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 20:50:11,132 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-12 20:50:11,132 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-12 20:50:11,132 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-12 20:50:11,133 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 20:50:11,357 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:50:11,357 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 20:50:11,359 INFO L202 PluginConnector]: Adding new model counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:50:11 BoogieIcfgContainer [2021-06-12 20:50:11,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:50:11,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:50:11,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:50:11,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:50:11,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:50:11" (1/2) ... [2021-06-12 20:50:11,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a70d7b6 and model type counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:50:11, skipping insertion in model container [2021-06-12 20:50:11,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:50:11" (2/2) ... [2021-06-12 20:50:11,365 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-determinism.wvr.bpl [2021-06-12 20:50:11,369 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:50:11,369 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:50:11,369 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:50:11,370 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:50:11,447 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-12 20:50:11,463 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-12 20:50:11,477 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:50:11,478 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:50:11,478 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:50:11,478 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:50:11,478 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:50:11,478 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:50:11,478 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:50:11,478 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:50:11,489 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 39 transitions, 110 flow [2021-06-12 20:50:11,549 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:11,554 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:11,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 20:50:11,580 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:11,581 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, 1] [2021-06-12 20:50:11,581 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:11,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:11,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1357321038, now seen corresponding path program 1 times [2021-06-12 20:50:11,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:11,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575678849] [2021-06-12 20:50:11,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:11,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:11,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:11,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575678849] [2021-06-12 20:50:11,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575678849] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:50:11,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:50:11,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:50:11,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254252423] [2021-06-12 20:50:11,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:50:11,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:11,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:50:11,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:50:11,878 INFO L87 Difference]: Start difference. First operand has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 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 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:11,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:11,978 INFO L93 Difference]: Finished difference Result 1267 states and 4622 transitions. [2021-06-12 20:50:11,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:50:11,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 20:50:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:12,009 INFO L225 Difference]: With dead ends: 1267 [2021-06-12 20:50:12,009 INFO L226 Difference]: Without dead ends: 1056 [2021-06-12 20:50:12,012 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:50:12,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-06-12 20:50:12,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 775. [2021-06-12 20:50:12,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.7751937984496124) internal successors, (2922), 774 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2922 transitions. [2021-06-12 20:50:12,129 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2922 transitions. Word has length 25 [2021-06-12 20:50:12,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:12,130 INFO L482 AbstractCegarLoop]: Abstraction has 775 states and 2922 transitions. [2021-06-12 20:50:12,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:12,130 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2922 transitions. [2021-06-12 20:50:12,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:50:12,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:12,135 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, 1, 1, 1] [2021-06-12 20:50:12,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:50:12,137 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:12,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:12,140 INFO L82 PathProgramCache]: Analyzing trace with hash -219840432, now seen corresponding path program 1 times [2021-06-12 20:50:12,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:12,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777955705] [2021-06-12 20:50:12,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:12,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:12,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777955705] [2021-06-12 20:50:12,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777955705] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:50:12,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:50:12,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 20:50:12,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190348440] [2021-06-12 20:50:12,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:50:12,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:12,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:50:12,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:50:12,248 INFO L87 Difference]: Start difference. First operand 775 states and 2922 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:12,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:12,394 INFO L93 Difference]: Finished difference Result 1405 states and 5168 transitions. [2021-06-12 20:50:12,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:50:12,394 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 20:50:12,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:12,404 INFO L225 Difference]: With dead ends: 1405 [2021-06-12 20:50:12,404 INFO L226 Difference]: Without dead ends: 1369 [2021-06-12 20:50:12,406 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:50:12,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-12 20:50:12,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 903. [2021-06-12 20:50:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.8104212860310422) internal successors, (3437), 902 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:12,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3437 transitions. [2021-06-12 20:50:12,443 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3437 transitions. Word has length 27 [2021-06-12 20:50:12,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:12,444 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 3437 transitions. [2021-06-12 20:50:12,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:12,445 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3437 transitions. [2021-06-12 20:50:12,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:50:12,449 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:12,449 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, 1, 1, 1] [2021-06-12 20:50:12,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 20:50:12,450 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:12,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:12,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1181437776, now seen corresponding path program 1 times [2021-06-12 20:50:12,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:12,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104568002] [2021-06-12 20:50:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:12,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:12,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:12,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104568002] [2021-06-12 20:50:12,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104568002] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:50:12,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:50:12,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 20:50:12,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323679804] [2021-06-12 20:50:12,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:50:12,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:12,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:50:12,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:50:12,510 INFO L87 Difference]: Start difference. First operand 903 states and 3437 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:12,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:12,637 INFO L93 Difference]: Finished difference Result 1359 states and 4974 transitions. [2021-06-12 20:50:12,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:50:12,640 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 20:50:12,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:12,652 INFO L225 Difference]: With dead ends: 1359 [2021-06-12 20:50:12,652 INFO L226 Difference]: Without dead ends: 1327 [2021-06-12 20:50:12,657 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:50:12,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-12 20:50:12,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 931. [2021-06-12 20:50:12,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.7838709677419353) internal successors, (3519), 930 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3519 transitions. [2021-06-12 20:50:12,695 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3519 transitions. Word has length 27 [2021-06-12 20:50:12,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:12,696 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3519 transitions. [2021-06-12 20:50:12,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:12,696 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3519 transitions. [2021-06-12 20:50:12,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:50:12,700 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:12,700 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, 1, 1, 1] [2021-06-12 20:50:12,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 20:50:12,700 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:12,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:12,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1293793296, now seen corresponding path program 2 times [2021-06-12 20:50:12,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:12,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630763496] [2021-06-12 20:50:12,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:12,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:12,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630763496] [2021-06-12 20:50:12,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630763496] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:50:12,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:50:12,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 20:50:12,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579217555] [2021-06-12 20:50:12,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:50:12,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:12,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:50:12,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:50:12,795 INFO L87 Difference]: Start difference. First operand 931 states and 3519 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:12,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:12,859 INFO L93 Difference]: Finished difference Result 1126 states and 4123 transitions. [2021-06-12 20:50:12,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:50:12,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 20:50:12,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:12,866 INFO L225 Difference]: With dead ends: 1126 [2021-06-12 20:50:12,866 INFO L226 Difference]: Without dead ends: 1044 [2021-06-12 20:50:12,866 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:50:12,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-12 20:50:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 845. [2021-06-12 20:50:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.7831753554502368) internal successors, (3193), 844 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 3193 transitions. [2021-06-12 20:50:12,893 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 3193 transitions. Word has length 27 [2021-06-12 20:50:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:12,893 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 3193 transitions. [2021-06-12 20:50:12,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:12,894 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 3193 transitions. [2021-06-12 20:50:12,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:50:12,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:12,897 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, 1, 1, 1] [2021-06-12 20:50:12,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 20:50:12,897 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:12,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:12,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2011026324, now seen corresponding path program 2 times [2021-06-12 20:50:12,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:12,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754783797] [2021-06-12 20:50:12,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:12,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:12,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754783797] [2021-06-12 20:50:12,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754783797] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:50:12,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:50:12,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:50:12,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157352621] [2021-06-12 20:50:12,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:50:12,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:12,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:50:12,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:50:12,925 INFO L87 Difference]: Start difference. First operand 845 states and 3193 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:12,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:12,978 INFO L93 Difference]: Finished difference Result 1296 states and 4868 transitions. [2021-06-12 20:50:12,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:50:12,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 20:50:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:12,986 INFO L225 Difference]: With dead ends: 1296 [2021-06-12 20:50:12,987 INFO L226 Difference]: Without dead ends: 1276 [2021-06-12 20:50:12,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:50:12,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-12 20:50:13,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 897. [2021-06-12 20:50:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.8359375) internal successors, (3437), 896 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:13,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3437 transitions. [2021-06-12 20:50:13,020 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3437 transitions. Word has length 27 [2021-06-12 20:50:13,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:13,021 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3437 transitions. [2021-06-12 20:50:13,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:13,021 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3437 transitions. [2021-06-12 20:50:13,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:50:13,024 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:13,024 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, 1, 1, 1] [2021-06-12 20:50:13,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 20:50:13,024 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:13,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:13,025 INFO L82 PathProgramCache]: Analyzing trace with hash 30382996, now seen corresponding path program 3 times [2021-06-12 20:50:13,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:13,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692028547] [2021-06-12 20:50:13,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:13,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:13,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692028547] [2021-06-12 20:50:13,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692028547] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:50:13,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:50:13,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:50:13,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560753021] [2021-06-12 20:50:13,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:50:13,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:13,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:50:13,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:50:13,064 INFO L87 Difference]: Start difference. First operand 897 states and 3437 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:13,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:13,174 INFO L93 Difference]: Finished difference Result 1772 states and 6736 transitions. [2021-06-12 20:50:13,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:50:13,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 20:50:13,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:13,186 INFO L225 Difference]: With dead ends: 1772 [2021-06-12 20:50:13,186 INFO L226 Difference]: Without dead ends: 1752 [2021-06-12 20:50:13,187 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:50:13,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-06-12 20:50:13,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1021. [2021-06-12 20:50:13,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 3.9323529411764704) internal successors, (4011), 1020 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:13,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 4011 transitions. [2021-06-12 20:50:13,237 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 4011 transitions. Word has length 27 [2021-06-12 20:50:13,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:13,240 INFO L482 AbstractCegarLoop]: Abstraction has 1021 states and 4011 transitions. [2021-06-12 20:50:13,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:13,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 4011 transitions. [2021-06-12 20:50:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 20:50:13,244 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:13,244 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, 1, 1, 1] [2021-06-12 20:50:13,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 20:50:13,244 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:13,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:13,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1548229740, now seen corresponding path program 4 times [2021-06-12 20:50:13,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:13,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870488730] [2021-06-12 20:50:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:13,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:13,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870488730] [2021-06-12 20:50:13,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870488730] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:50:13,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:50:13,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:50:13,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649391945] [2021-06-12 20:50:13,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:50:13,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:13,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:50:13,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:50:13,325 INFO L87 Difference]: Start difference. First operand 1021 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:13,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:13,399 INFO L93 Difference]: Finished difference Result 1137 states and 4479 transitions. [2021-06-12 20:50:13,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:50:13,400 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 20:50:13,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:13,407 INFO L225 Difference]: With dead ends: 1137 [2021-06-12 20:50:13,408 INFO L226 Difference]: Without dead ends: 1137 [2021-06-12 20:50:13,408 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:50:13,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-06-12 20:50:13,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 929. [2021-06-12 20:50:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.9364224137931036) internal successors, (3653), 928 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:13,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3653 transitions. [2021-06-12 20:50:13,438 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3653 transitions. Word has length 27 [2021-06-12 20:50:13,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:13,438 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 3653 transitions. [2021-06-12 20:50:13,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:13,438 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3653 transitions. [2021-06-12 20:50:13,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:50:13,441 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:13,442 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, 1, 1, 1, 1, 1] [2021-06-12 20:50:13,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 20:50:13,442 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:13,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:13,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1875081166, now seen corresponding path program 1 times [2021-06-12 20:50:13,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:13,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411380355] [2021-06-12 20:50:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:13,478 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 20:50:13,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:13,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411380355] [2021-06-12 20:50:13,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411380355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:13,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46732896] [2021-06-12 20:50:13,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:13,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 20:50:13,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:13,717 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 20:50:13,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46732896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:13,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:13,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-12 20:50:13,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919470204] [2021-06-12 20:50:13,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:50:13,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:13,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:50:13,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:50:13,719 INFO L87 Difference]: Start difference. First operand 929 states and 3653 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:13,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:13,870 INFO L93 Difference]: Finished difference Result 1388 states and 5211 transitions. [2021-06-12 20:50:13,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:50:13,873 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 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 29 [2021-06-12 20:50:13,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:13,881 INFO L225 Difference]: With dead ends: 1388 [2021-06-12 20:50:13,881 INFO L226 Difference]: Without dead ends: 1388 [2021-06-12 20:50:13,881 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:50:13,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-06-12 20:50:13,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1027. [2021-06-12 20:50:13,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.8703703703703702) internal successors, (3971), 1026 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:13,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3971 transitions. [2021-06-12 20:50:13,920 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3971 transitions. Word has length 29 [2021-06-12 20:50:13,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:13,920 INFO L482 AbstractCegarLoop]: Abstraction has 1027 states and 3971 transitions. [2021-06-12 20:50:13,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:13,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3971 transitions. [2021-06-12 20:50:13,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 20:50:13,923 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:13,923 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, 1, 1, 1, 1, 1] [2021-06-12 20:50:14,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-12 20:50:14,137 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:14,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:14,137 INFO L82 PathProgramCache]: Analyzing trace with hash -775253682, now seen corresponding path program 2 times [2021-06-12 20:50:14,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:14,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449180437] [2021-06-12 20:50:14,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:14,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:14,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449180437] [2021-06-12 20:50:14,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449180437] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:50:14,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:50:14,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:50:14,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357828557] [2021-06-12 20:50:14,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:50:14,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:14,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:50:14,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:50:14,174 INFO L87 Difference]: Start difference. First operand 1027 states and 3971 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:14,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:14,227 INFO L93 Difference]: Finished difference Result 1113 states and 4299 transitions. [2021-06-12 20:50:14,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:50:14,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-12 20:50:14,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:14,234 INFO L225 Difference]: With dead ends: 1113 [2021-06-12 20:50:14,234 INFO L226 Difference]: Without dead ends: 1113 [2021-06-12 20:50:14,234 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:50:14,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-06-12 20:50:14,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 955. [2021-06-12 20:50:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.846960167714885) internal successors, (3670), 954 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 20:50:14,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3670 transitions. [2021-06-12 20:50:14,263 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3670 transitions. Word has length 29 [2021-06-12 20:50:14,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:14,264 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 3670 transitions. [2021-06-12 20:50:14,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:14,264 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3670 transitions. [2021-06-12 20:50:14,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:50:14,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:14,268 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:14,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-12 20:50:14,268 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:14,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:14,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1393715960, now seen corresponding path program 1 times [2021-06-12 20:50:14,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:14,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816279171] [2021-06-12 20:50:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:14,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:14,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816279171] [2021-06-12 20:50:14,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816279171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:14,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750610683] [2021-06-12 20:50:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:14,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:50:14,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:14,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750610683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:14,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:14,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 20:50:14,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100842543] [2021-06-12 20:50:14,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:50:14,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:14,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:50:14,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:50:14,484 INFO L87 Difference]: Start difference. First operand 955 states and 3670 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:14,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:14,554 INFO L93 Difference]: Finished difference Result 1404 states and 5202 transitions. [2021-06-12 20:50:14,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:50:14,554 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:50:14,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:14,577 INFO L225 Difference]: With dead ends: 1404 [2021-06-12 20:50:14,578 INFO L226 Difference]: Without dead ends: 1404 [2021-06-12 20:50:14,578 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:50:14,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-06-12 20:50:14,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1036. [2021-06-12 20:50:14,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.7980676328502416) internal successors, (3931), 1035 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:14,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3931 transitions. [2021-06-12 20:50:14,609 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3931 transitions. Word has length 31 [2021-06-12 20:50:14,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:14,611 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 3931 transitions. [2021-06-12 20:50:14,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:14,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3931 transitions. [2021-06-12 20:50:14,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:50:14,615 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:14,615 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:14,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 20:50:14,833 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:14,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:14,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1732283312, now seen corresponding path program 2 times [2021-06-12 20:50:14,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:14,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270454349] [2021-06-12 20:50:14,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:14,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:14,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270454349] [2021-06-12 20:50:14,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270454349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:14,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181418865] [2021-06-12 20:50:14,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:14,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:50:14,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:14,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:50:14,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:15,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181418865] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:50:15,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 20:50:15,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-06-12 20:50:15,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387438021] [2021-06-12 20:50:15,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:50:15,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:15,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:50:15,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:50:15,014 INFO L87 Difference]: Start difference. First operand 1036 states and 3931 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:15,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:15,051 INFO L93 Difference]: Finished difference Result 1123 states and 4234 transitions. [2021-06-12 20:50:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:50:15,052 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:50:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:15,056 INFO L225 Difference]: With dead ends: 1123 [2021-06-12 20:50:15,056 INFO L226 Difference]: Without dead ends: 1063 [2021-06-12 20:50:15,056 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:50:15,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-06-12 20:50:15,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 916. [2021-06-12 20:50:15,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.814207650273224) internal successors, (3490), 915 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3490 transitions. [2021-06-12 20:50:15,084 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3490 transitions. Word has length 31 [2021-06-12 20:50:15,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:15,084 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 3490 transitions. [2021-06-12 20:50:15,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:15,085 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3490 transitions. [2021-06-12 20:50:15,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:50:15,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:15,087 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:15,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-12 20:50:15,313 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:15,313 INFO L82 PathProgramCache]: Analyzing trace with hash -237850558, now seen corresponding path program 1 times [2021-06-12 20:50:15,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:15,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605995542] [2021-06-12 20:50:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:15,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:15,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605995542] [2021-06-12 20:50:15,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605995542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:15,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128253322] [2021-06-12 20:50:15,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:15,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 20:50:15,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:50:15,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128253322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:15,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:15,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-06-12 20:50:15,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910364070] [2021-06-12 20:50:15,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:50:15,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:15,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:50:15,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:50:15,531 INFO L87 Difference]: Start difference. First operand 916 states and 3490 transitions. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 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 20:50:15,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:15,606 INFO L93 Difference]: Finished difference Result 3683 states and 13665 transitions. [2021-06-12 20:50:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:50:15,606 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 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 33 [2021-06-12 20:50:15,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:15,618 INFO L225 Difference]: With dead ends: 3683 [2021-06-12 20:50:15,618 INFO L226 Difference]: Without dead ends: 3245 [2021-06-12 20:50:15,619 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:50:15,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2021-06-12 20:50:15,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 2020. [2021-06-12 20:50:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.8959881129271916) internal successors, (7866), 2019 states have internal predecessors, (7866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 7866 transitions. [2021-06-12 20:50:15,694 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 7866 transitions. Word has length 33 [2021-06-12 20:50:15,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:15,694 INFO L482 AbstractCegarLoop]: Abstraction has 2020 states and 7866 transitions. [2021-06-12 20:50:15,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 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 20:50:15,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 7866 transitions. [2021-06-12 20:50:15,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:50:15,700 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:15,700 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:15,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:15,924 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:15,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1992632042, now seen corresponding path program 2 times [2021-06-12 20:50:15,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:15,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643024478] [2021-06-12 20:50:15,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:15,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:15,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643024478] [2021-06-12 20:50:15,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643024478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:15,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660966899] [2021-06-12 20:50:15,976 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:16,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:50:16,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:16,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 20:50:16,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:16,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660966899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:16,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:16,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-12 20:50:16,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867822728] [2021-06-12 20:50:16,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:50:16,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:16,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:50:16,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:50:16,123 INFO L87 Difference]: Start difference. First operand 2020 states and 7866 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 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 20:50:16,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:16,243 INFO L93 Difference]: Finished difference Result 5705 states and 21618 transitions. [2021-06-12 20:50:16,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:50:16,244 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 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 33 [2021-06-12 20:50:16,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:16,263 INFO L225 Difference]: With dead ends: 5705 [2021-06-12 20:50:16,263 INFO L226 Difference]: Without dead ends: 5282 [2021-06-12 20:50:16,264 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:50:16,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5282 states. [2021-06-12 20:50:16,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5282 to 2797. [2021-06-12 20:50:16,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2796 states have (on average 3.987839771101574) internal successors, (11150), 2796 states have internal predecessors, (11150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:16,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 11150 transitions. [2021-06-12 20:50:16,375 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 11150 transitions. Word has length 33 [2021-06-12 20:50:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:16,375 INFO L482 AbstractCegarLoop]: Abstraction has 2797 states and 11150 transitions. [2021-06-12 20:50:16,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 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 20:50:16,375 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 11150 transitions. [2021-06-12 20:50:16,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:50:16,383 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:16,383 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:16,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-12 20:50:16,605 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:16,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:16,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1695022730, now seen corresponding path program 3 times [2021-06-12 20:50:16,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:16,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064553362] [2021-06-12 20:50:16,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:16,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:16,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064553362] [2021-06-12 20:50:16,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064553362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:16,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112724908] [2021-06-12 20:50:16,655 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:16,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:50:16,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:16,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 20:50:16,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:16,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112724908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:16,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:16,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-12 20:50:16,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264406223] [2021-06-12 20:50:16,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:50:16,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:16,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:50:16,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:50:16,783 INFO L87 Difference]: Start difference. First operand 2797 states and 11150 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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 20:50:16,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:16,915 INFO L93 Difference]: Finished difference Result 5724 states and 21929 transitions. [2021-06-12 20:50:16,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:50:16,928 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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 33 [2021-06-12 20:50:16,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:16,947 INFO L225 Difference]: With dead ends: 5724 [2021-06-12 20:50:16,947 INFO L226 Difference]: Without dead ends: 5132 [2021-06-12 20:50:16,947 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:50:16,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-06-12 20:50:17,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 2475. [2021-06-12 20:50:17,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 3.900565885206144) internal successors, (9650), 2474 states have internal predecessors, (9650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 9650 transitions. [2021-06-12 20:50:17,055 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 9650 transitions. Word has length 33 [2021-06-12 20:50:17,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:17,055 INFO L482 AbstractCegarLoop]: Abstraction has 2475 states and 9650 transitions. [2021-06-12 20:50:17,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 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 20:50:17,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 9650 transitions. [2021-06-12 20:50:17,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 20:50:17,062 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:17,062 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:17,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:17,277 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:17,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:17,277 INFO L82 PathProgramCache]: Analyzing trace with hash -304519936, now seen corresponding path program 4 times [2021-06-12 20:50:17,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:17,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44381028] [2021-06-12 20:50:17,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:17,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:17,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44381028] [2021-06-12 20:50:17,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44381028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:17,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583530796] [2021-06-12 20:50:17,325 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:17,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:50:17,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:50:17,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:17,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583530796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:17,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:17,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 20:50:17,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075088923] [2021-06-12 20:50:17,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:50:17,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:17,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:50:17,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:50:17,493 INFO L87 Difference]: Start difference. First operand 2475 states and 9650 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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 20:50:17,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:17,855 INFO L93 Difference]: Finished difference Result 6143 states and 23236 transitions. [2021-06-12 20:50:17,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:50:17,855 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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 35 [2021-06-12 20:50:17,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:17,886 INFO L225 Difference]: With dead ends: 6143 [2021-06-12 20:50:17,886 INFO L226 Difference]: Without dead ends: 6077 [2021-06-12 20:50:17,888 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:50:17,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2021-06-12 20:50:17,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 2842. [2021-06-12 20:50:17,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 3.9010911650827174) internal successors, (11083), 2841 states have internal predecessors, (11083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:18,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 11083 transitions. [2021-06-12 20:50:18,007 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 11083 transitions. Word has length 35 [2021-06-12 20:50:18,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:18,008 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 11083 transitions. [2021-06-12 20:50:18,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 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 20:50:18,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 11083 transitions. [2021-06-12 20:50:18,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 20:50:18,016 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:18,016 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:18,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 20:50:18,233 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:18,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:18,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1524858692, now seen corresponding path program 5 times [2021-06-12 20:50:18,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:18,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524791702] [2021-06-12 20:50:18,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:18,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:18,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:18,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524791702] [2021-06-12 20:50:18,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524791702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:18,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045877297] [2021-06-12 20:50:18,268 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:18,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:50:18,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:18,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:50:18,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:18,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045877297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:18,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:18,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-12 20:50:18,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372154185] [2021-06-12 20:50:18,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:50:18,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:18,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:50:18,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:50:18,425 INFO L87 Difference]: Start difference. First operand 2842 states and 11083 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 20:50:18,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:18,739 INFO L93 Difference]: Finished difference Result 10702 states and 40797 transitions. [2021-06-12 20:50:18,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:50:18,739 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 35 [2021-06-12 20:50:18,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:18,781 INFO L225 Difference]: With dead ends: 10702 [2021-06-12 20:50:18,782 INFO L226 Difference]: Without dead ends: 10294 [2021-06-12 20:50:18,782 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:50:18,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10294 states. [2021-06-12 20:50:18,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10294 to 4458. [2021-06-12 20:50:18,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4458 states, 4457 states have (on average 4.070002243661656) internal successors, (18140), 4457 states have internal predecessors, (18140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:18,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4458 states to 4458 states and 18140 transitions. [2021-06-12 20:50:18,958 INFO L78 Accepts]: Start accepts. Automaton has 4458 states and 18140 transitions. Word has length 35 [2021-06-12 20:50:18,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:18,959 INFO L482 AbstractCegarLoop]: Abstraction has 4458 states and 18140 transitions. [2021-06-12 20:50:18,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 20:50:18,959 INFO L276 IsEmpty]: Start isEmpty. Operand 4458 states and 18140 transitions. [2021-06-12 20:50:18,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 20:50:18,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:18,971 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:19,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 20:50:19,185 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:19,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:19,185 INFO L82 PathProgramCache]: Analyzing trace with hash -355168440, now seen corresponding path program 6 times [2021-06-12 20:50:19,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:19,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180868287] [2021-06-12 20:50:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:19,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:19,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180868287] [2021-06-12 20:50:19,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180868287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:19,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133730936] [2021-06-12 20:50:19,235 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:19,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:50:19,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:19,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:50:19,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:19,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133730936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:19,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:19,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-12 20:50:19,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701161665] [2021-06-12 20:50:19,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:50:19,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:19,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:50:19,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:50:19,414 INFO L87 Difference]: Start difference. First operand 4458 states and 18140 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 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 20:50:19,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:19,944 INFO L93 Difference]: Finished difference Result 7423 states and 28628 transitions. [2021-06-12 20:50:19,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:50:19,944 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 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 35 [2021-06-12 20:50:19,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:19,970 INFO L225 Difference]: With dead ends: 7423 [2021-06-12 20:50:19,970 INFO L226 Difference]: Without dead ends: 7391 [2021-06-12 20:50:19,970 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 323.0ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:50:19,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7391 states. [2021-06-12 20:50:20,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7391 to 4655. [2021-06-12 20:50:20,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 4.056940266437473) internal successors, (18881), 4654 states have internal predecessors, (18881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 18881 transitions. [2021-06-12 20:50:20,168 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 18881 transitions. Word has length 35 [2021-06-12 20:50:20,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:20,168 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 18881 transitions. [2021-06-12 20:50:20,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 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 20:50:20,168 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 18881 transitions. [2021-06-12 20:50:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 20:50:20,180 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:20,180 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:20,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 20:50:20,395 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:20,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:20,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1441421880, now seen corresponding path program 7 times [2021-06-12 20:50:20,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:20,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758938100] [2021-06-12 20:50:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:20,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:20,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758938100] [2021-06-12 20:50:20,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758938100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:20,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878957289] [2021-06-12 20:50:20,465 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:20,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:50:20,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:20,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878957289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:20,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:20,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-12 20:50:20,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228523990] [2021-06-12 20:50:20,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:50:20,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:20,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:50:20,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:50:20,629 INFO L87 Difference]: Start difference. First operand 4655 states and 18881 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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 20:50:21,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:21,177 INFO L93 Difference]: Finished difference Result 17746 states and 70993 transitions. [2021-06-12 20:50:21,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:50:21,178 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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 35 [2021-06-12 20:50:21,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:21,229 INFO L225 Difference]: With dead ends: 17746 [2021-06-12 20:50:21,230 INFO L226 Difference]: Without dead ends: 17648 [2021-06-12 20:50:21,230 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 291.3ms TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:50:21,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17648 states. [2021-06-12 20:50:21,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17648 to 7394. [2021-06-12 20:50:21,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7394 states, 7393 states have (on average 4.241579872852698) internal successors, (31358), 7393 states have internal predecessors, (31358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:21,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7394 states to 7394 states and 31358 transitions. [2021-06-12 20:50:21,598 INFO L78 Accepts]: Start accepts. Automaton has 7394 states and 31358 transitions. Word has length 35 [2021-06-12 20:50:21,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:21,599 INFO L482 AbstractCegarLoop]: Abstraction has 7394 states and 31358 transitions. [2021-06-12 20:50:21,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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 20:50:21,599 INFO L276 IsEmpty]: Start isEmpty. Operand 7394 states and 31358 transitions. [2021-06-12 20:50:21,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 20:50:21,617 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:21,617 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:21,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 20:50:21,833 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:21,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1322322868, now seen corresponding path program 8 times [2021-06-12 20:50:21,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:21,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868672730] [2021-06-12 20:50:21,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:21,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:21,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868672730] [2021-06-12 20:50:21,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868672730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:21,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046654584] [2021-06-12 20:50:21,937 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:22,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:50:22,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:22,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:50:22,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:22,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046654584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:22,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:22,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-12 20:50:22,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446774007] [2021-06-12 20:50:22,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:50:22,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:22,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:50:22,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:50:22,144 INFO L87 Difference]: Start difference. First operand 7394 states and 31358 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 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 20:50:22,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:22,698 INFO L93 Difference]: Finished difference Result 21973 states and 91914 transitions. [2021-06-12 20:50:22,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:50:22,699 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 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 35 [2021-06-12 20:50:22,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:22,761 INFO L225 Difference]: With dead ends: 21973 [2021-06-12 20:50:22,761 INFO L226 Difference]: Without dead ends: 21443 [2021-06-12 20:50:22,762 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:50:22,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21443 states. [2021-06-12 20:50:23,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21443 to 8728. [2021-06-12 20:50:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8728 states, 8727 states have (on average 4.463274894007104) internal successors, (38951), 8727 states have internal predecessors, (38951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:23,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8728 states to 8728 states and 38951 transitions. [2021-06-12 20:50:23,171 INFO L78 Accepts]: Start accepts. Automaton has 8728 states and 38951 transitions. Word has length 35 [2021-06-12 20:50:23,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:23,171 INFO L482 AbstractCegarLoop]: Abstraction has 8728 states and 38951 transitions. [2021-06-12 20:50:23,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 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 20:50:23,171 INFO L276 IsEmpty]: Start isEmpty. Operand 8728 states and 38951 transitions. [2021-06-12 20:50:23,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 20:50:23,194 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:23,194 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:23,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:23,418 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:23,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:23,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1712284596, now seen corresponding path program 9 times [2021-06-12 20:50:23,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:23,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732387528] [2021-06-12 20:50:23,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:23,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:23,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732387528] [2021-06-12 20:50:23,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732387528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:23,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895435836] [2021-06-12 20:50:23,480 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:23,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:50:23,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:23,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:50:23,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:23,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895435836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:23,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:23,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-12 20:50:23,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644459292] [2021-06-12 20:50:23,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:50:23,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:23,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:50:23,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:50:23,611 INFO L87 Difference]: Start difference. First operand 8728 states and 38951 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 20:50:24,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:24,253 INFO L93 Difference]: Finished difference Result 15939 states and 66344 transitions. [2021-06-12 20:50:24,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:50:24,253 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 35 [2021-06-12 20:50:24,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:24,293 INFO L225 Difference]: With dead ends: 15939 [2021-06-12 20:50:24,293 INFO L226 Difference]: Without dead ends: 15563 [2021-06-12 20:50:24,294 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 368.6ms TimeCoverageRelationStatistics Valid=407, Invalid=925, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:50:24,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15563 states. [2021-06-12 20:50:24,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15563 to 9935. [2021-06-12 20:50:24,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9935 states, 9934 states have (on average 4.418260519428227) internal successors, (43891), 9934 states have internal predecessors, (43891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:24,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9935 states to 9935 states and 43891 transitions. [2021-06-12 20:50:24,713 INFO L78 Accepts]: Start accepts. Automaton has 9935 states and 43891 transitions. Word has length 35 [2021-06-12 20:50:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:24,713 INFO L482 AbstractCegarLoop]: Abstraction has 9935 states and 43891 transitions. [2021-06-12 20:50:24,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 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 20:50:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 9935 states and 43891 transitions. [2021-06-12 20:50:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 20:50:24,743 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:24,743 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:24,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:24,945 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:24,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:24,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1290484416, now seen corresponding path program 10 times [2021-06-12 20:50:24,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:24,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115367198] [2021-06-12 20:50:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:24,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:24,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115367198] [2021-06-12 20:50:24,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115367198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:24,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130569321] [2021-06-12 20:50:24,969 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:24,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:50:24,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:25,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:50:25,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:25,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130569321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:25,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:25,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-12 20:50:25,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803656595] [2021-06-12 20:50:25,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:50:25,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:25,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:50:25,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:50:25,100 INFO L87 Difference]: Start difference. First operand 9935 states and 43891 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 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 20:50:25,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:25,375 INFO L93 Difference]: Finished difference Result 17650 states and 76018 transitions. [2021-06-12 20:50:25,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:50:25,376 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 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 35 [2021-06-12 20:50:25,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:25,539 INFO L225 Difference]: With dead ends: 17650 [2021-06-12 20:50:25,540 INFO L226 Difference]: Without dead ends: 17578 [2021-06-12 20:50:25,541 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 118.8ms TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:50:25,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17578 states. [2021-06-12 20:50:25,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17578 to 12387. [2021-06-12 20:50:25,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12387 states, 12386 states have (on average 4.56353948005813) internal successors, (56524), 12386 states have internal predecessors, (56524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12387 states to 12387 states and 56524 transitions. [2021-06-12 20:50:25,972 INFO L78 Accepts]: Start accepts. Automaton has 12387 states and 56524 transitions. Word has length 35 [2021-06-12 20:50:25,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:25,973 INFO L482 AbstractCegarLoop]: Abstraction has 12387 states and 56524 transitions. [2021-06-12 20:50:25,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 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 20:50:25,973 INFO L276 IsEmpty]: Start isEmpty. Operand 12387 states and 56524 transitions. [2021-06-12 20:50:26,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 20:50:26,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:26,007 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:26,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 20:50:26,322 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:26,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:26,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1130396630, now seen corresponding path program 11 times [2021-06-12 20:50:26,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:26,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638765891] [2021-06-12 20:50:26,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:26,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:50:26,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:26,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638765891] [2021-06-12 20:50:26,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638765891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:26,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136737680] [2021-06-12 20:50:26,380 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:26,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:50:26,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:26,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:50:26,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:26,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136737680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:26,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:26,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 20:50:26,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268665365] [2021-06-12 20:50:26,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:50:26,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:26,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:50:26,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:50:26,590 INFO L87 Difference]: Start difference. First operand 12387 states and 56524 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 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 20:50:27,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:27,260 INFO L93 Difference]: Finished difference Result 47667 states and 212153 transitions. [2021-06-12 20:50:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:50:27,260 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 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 37 [2021-06-12 20:50:27,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:27,413 INFO L225 Difference]: With dead ends: 47667 [2021-06-12 20:50:27,413 INFO L226 Difference]: Without dead ends: 46072 [2021-06-12 20:50:27,414 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 289.9ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:50:27,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46072 states. [2021-06-12 20:50:28,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46072 to 27040. [2021-06-12 20:50:28,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27040 states, 27039 states have (on average 4.81733791930175) internal successors, (130256), 27039 states have internal predecessors, (130256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27040 states to 27040 states and 130256 transitions. [2021-06-12 20:50:28,483 INFO L78 Accepts]: Start accepts. Automaton has 27040 states and 130256 transitions. Word has length 37 [2021-06-12 20:50:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:28,483 INFO L482 AbstractCegarLoop]: Abstraction has 27040 states and 130256 transitions. [2021-06-12 20:50:28,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 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 20:50:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 27040 states and 130256 transitions. [2021-06-12 20:50:28,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 20:50:28,720 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:28,720 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:28,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:28,929 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:28,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:28,929 INFO L82 PathProgramCache]: Analyzing trace with hash 483536730, now seen corresponding path program 12 times [2021-06-12 20:50:28,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:28,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102599416] [2021-06-12 20:50:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:28,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:50:28,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:28,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102599416] [2021-06-12 20:50:28,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102599416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:28,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474187135] [2021-06-12 20:50:28,993 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:29,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:50:29,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:29,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:50:29,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:29,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474187135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:29,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:29,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-12 20:50:29,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938289468] [2021-06-12 20:50:29,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:50:29,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:29,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:50:29,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:50:29,130 INFO L87 Difference]: Start difference. First operand 27040 states and 130256 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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 20:50:29,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:29,802 INFO L93 Difference]: Finished difference Result 41877 states and 190705 transitions. [2021-06-12 20:50:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:50:29,802 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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 37 [2021-06-12 20:50:29,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:30,042 INFO L225 Difference]: With dead ends: 41877 [2021-06-12 20:50:30,043 INFO L226 Difference]: Without dead ends: 41385 [2021-06-12 20:50:30,043 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 179.3ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:50:30,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41385 states. [2021-06-12 20:50:30,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41385 to 26074. [2021-06-12 20:50:30,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26074 states, 26073 states have (on average 4.745944080082844) internal successors, (123741), 26073 states have internal predecessors, (123741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26074 states to 26074 states and 123741 transitions. [2021-06-12 20:50:30,969 INFO L78 Accepts]: Start accepts. Automaton has 26074 states and 123741 transitions. Word has length 37 [2021-06-12 20:50:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:30,969 INFO L482 AbstractCegarLoop]: Abstraction has 26074 states and 123741 transitions. [2021-06-12 20:50:30,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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 20:50:30,969 INFO L276 IsEmpty]: Start isEmpty. Operand 26074 states and 123741 transitions. [2021-06-12 20:50:31,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 20:50:31,050 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:31,050 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:31,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 20:50:31,251 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:31,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:31,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2021180106, now seen corresponding path program 13 times [2021-06-12 20:50:31,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:31,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142484778] [2021-06-12 20:50:31,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:50:31,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:31,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142484778] [2021-06-12 20:50:31,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142484778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:31,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9600063] [2021-06-12 20:50:31,304 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:31,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:50:31,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:31,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9600063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:31,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:31,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-12 20:50:31,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342275878] [2021-06-12 20:50:31,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:50:31,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:31,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:50:31,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:50:31,444 INFO L87 Difference]: Start difference. First operand 26074 states and 123741 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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 20:50:32,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:32,216 INFO L93 Difference]: Finished difference Result 55329 states and 256839 transitions. [2021-06-12 20:50:32,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:50:32,216 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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 37 [2021-06-12 20:50:32,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:32,597 INFO L225 Difference]: With dead ends: 55329 [2021-06-12 20:50:32,598 INFO L226 Difference]: Without dead ends: 54965 [2021-06-12 20:50:32,598 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:50:32,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54965 states. [2021-06-12 20:50:33,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54965 to 37282. [2021-06-12 20:50:33,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37282 states, 37281 states have (on average 4.838925994474397) internal successors, (180400), 37281 states have internal predecessors, (180400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:33,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37282 states to 37282 states and 180400 transitions. [2021-06-12 20:50:33,843 INFO L78 Accepts]: Start accepts. Automaton has 37282 states and 180400 transitions. Word has length 37 [2021-06-12 20:50:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:33,843 INFO L482 AbstractCegarLoop]: Abstraction has 37282 states and 180400 transitions. [2021-06-12 20:50:33,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 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 20:50:33,843 INFO L276 IsEmpty]: Start isEmpty. Operand 37282 states and 180400 transitions. [2021-06-12 20:50:33,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 20:50:33,948 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:33,948 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:34,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:34,152 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:34,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1258701498, now seen corresponding path program 14 times [2021-06-12 20:50:34,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:34,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314125984] [2021-06-12 20:50:34,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:50:34,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:34,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314125984] [2021-06-12 20:50:34,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314125984] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:50:34,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:50:34,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:50:34,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174908537] [2021-06-12 20:50:34,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:50:34,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:34,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:50:34,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:50:34,178 INFO L87 Difference]: Start difference. First operand 37282 states and 180400 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:34,633 INFO L93 Difference]: Finished difference Result 36224 states and 175246 transitions. [2021-06-12 20:50:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:50:34,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-12 20:50:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:34,752 INFO L225 Difference]: With dead ends: 36224 [2021-06-12 20:50:34,753 INFO L226 Difference]: Without dead ends: 36156 [2021-06-12 20:50:34,753 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:50:34,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36156 states. [2021-06-12 20:50:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36156 to 36036. [2021-06-12 20:50:35,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36036 states, 36035 states have (on average 4.84787012626613) internal successors, (174693), 36035 states have internal predecessors, (174693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:35,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36036 states to 36036 states and 174693 transitions. [2021-06-12 20:50:35,866 INFO L78 Accepts]: Start accepts. Automaton has 36036 states and 174693 transitions. Word has length 37 [2021-06-12 20:50:35,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:35,867 INFO L482 AbstractCegarLoop]: Abstraction has 36036 states and 174693 transitions. [2021-06-12 20:50:35,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:35,867 INFO L276 IsEmpty]: Start isEmpty. Operand 36036 states and 174693 transitions. [2021-06-12 20:50:35,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 20:50:35,949 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:35,949 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1] [2021-06-12 20:50:35,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-12 20:50:35,949 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:35,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:35,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2111156776, now seen corresponding path program 15 times [2021-06-12 20:50:35,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:35,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295966375] [2021-06-12 20:50:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:50:35,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:35,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295966375] [2021-06-12 20:50:35,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295966375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:35,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48727946] [2021-06-12 20:50:35,967 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 20:50:36,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:50:36,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:36,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:50:36,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:50:36,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48727946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:36,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:36,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2021-06-12 20:50:36,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384599624] [2021-06-12 20:50:36,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:50:36,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:36,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:50:36,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:50:36,122 INFO L87 Difference]: Start difference. First operand 36036 states and 174693 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:36,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:36,928 INFO L93 Difference]: Finished difference Result 51586 states and 247229 transitions. [2021-06-12 20:50:36,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:50:36,929 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 20:50:36,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:37,130 INFO L225 Difference]: With dead ends: 51586 [2021-06-12 20:50:37,130 INFO L226 Difference]: Without dead ends: 50003 [2021-06-12 20:50:37,131 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:50:37,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50003 states. [2021-06-12 20:50:38,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50003 to 45050. [2021-06-12 20:50:38,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45050 states, 45049 states have (on average 4.900574929521188) internal successors, (220766), 45049 states have internal predecessors, (220766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:38,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45050 states to 45050 states and 220766 transitions. [2021-06-12 20:50:38,644 INFO L78 Accepts]: Start accepts. Automaton has 45050 states and 220766 transitions. Word has length 39 [2021-06-12 20:50:38,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:38,644 INFO L482 AbstractCegarLoop]: Abstraction has 45050 states and 220766 transitions. [2021-06-12 20:50:38,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:38,644 INFO L276 IsEmpty]: Start isEmpty. Operand 45050 states and 220766 transitions. [2021-06-12 20:50:38,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 20:50:38,781 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:38,781 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1] [2021-06-12 20:50:38,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 20:50:38,984 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:38,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:38,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1915964464, now seen corresponding path program 16 times [2021-06-12 20:50:38,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:38,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365005555] [2021-06-12 20:50:38,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:50:39,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:39,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365005555] [2021-06-12 20:50:39,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365005555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:39,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473828403] [2021-06-12 20:50:39,028 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:39,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:50:39,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:39,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:50:39,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:50:39,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473828403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:39,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:39,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 20:50:39,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368381026] [2021-06-12 20:50:39,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:50:39,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:39,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:50:39,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:50:39,162 INFO L87 Difference]: Start difference. First operand 45050 states and 220766 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 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 20:50:40,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:40,085 INFO L93 Difference]: Finished difference Result 63166 states and 300566 transitions. [2021-06-12 20:50:40,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:50:40,085 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 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 39 [2021-06-12 20:50:40,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:40,335 INFO L225 Difference]: With dead ends: 63166 [2021-06-12 20:50:40,336 INFO L226 Difference]: Without dead ends: 63106 [2021-06-12 20:50:40,336 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:50:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63106 states. [2021-06-12 20:50:41,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63106 to 43451. [2021-06-12 20:50:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43451 states, 43450 states have (on average 4.851162255466053) internal successors, (210783), 43450 states have internal predecessors, (210783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:41,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43451 states to 43451 states and 210783 transitions. [2021-06-12 20:50:41,783 INFO L78 Accepts]: Start accepts. Automaton has 43451 states and 210783 transitions. Word has length 39 [2021-06-12 20:50:41,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:41,783 INFO L482 AbstractCegarLoop]: Abstraction has 43451 states and 210783 transitions. [2021-06-12 20:50:41,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 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 20:50:41,784 INFO L276 IsEmpty]: Start isEmpty. Operand 43451 states and 210783 transitions. [2021-06-12 20:50:42,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:50:42,229 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:42,229 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:50:42,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 20:50:42,465 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:42,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:42,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1538179198, now seen corresponding path program 17 times [2021-06-12 20:50:42,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:42,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060305074] [2021-06-12 20:50:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:50:42,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:42,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060305074] [2021-06-12 20:50:42,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060305074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:42,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489203649] [2021-06-12 20:50:42,528 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:42,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:50:42,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:42,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:50:42,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:50:42,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489203649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:42,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:42,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 20:50:42,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907565547] [2021-06-12 20:50:42,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:50:42,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:42,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:50:42,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:50:42,690 INFO L87 Difference]: Start difference. First operand 43451 states and 210783 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:43,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:43,072 INFO L93 Difference]: Finished difference Result 49744 states and 234920 transitions. [2021-06-12 20:50:43,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:50:43,072 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:50:43,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:43,577 INFO L225 Difference]: With dead ends: 49744 [2021-06-12 20:50:43,577 INFO L226 Difference]: Without dead ends: 49407 [2021-06-12 20:50:43,577 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:50:43,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49407 states. [2021-06-12 20:50:44,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49407 to 46277. [2021-06-12 20:50:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46277 states, 46276 states have (on average 4.791684674561328) internal successors, (221740), 46276 states have internal predecessors, (221740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46277 states to 46277 states and 221740 transitions. [2021-06-12 20:50:45,104 INFO L78 Accepts]: Start accepts. Automaton has 46277 states and 221740 transitions. Word has length 41 [2021-06-12 20:50:45,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:45,104 INFO L482 AbstractCegarLoop]: Abstraction has 46277 states and 221740 transitions. [2021-06-12 20:50:45,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:45,104 INFO L276 IsEmpty]: Start isEmpty. Operand 46277 states and 221740 transitions. [2021-06-12 20:50:45,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:50:45,240 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:45,241 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:50:45,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 20:50:45,445 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:45,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:45,445 INFO L82 PathProgramCache]: Analyzing trace with hash 591667582, now seen corresponding path program 18 times [2021-06-12 20:50:45,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:45,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770985203] [2021-06-12 20:50:45,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:45,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:45,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770985203] [2021-06-12 20:50:45,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770985203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:45,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891403503] [2021-06-12 20:50:45,500 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:45,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:50:45,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:45,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:50:45,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:45,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:50:45,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891403503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:45,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:45,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-06-12 20:50:45,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727828304] [2021-06-12 20:50:45,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:50:45,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:45,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:50:45,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:50:45,649 INFO L87 Difference]: Start difference. First operand 46277 states and 221740 transitions. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:46,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:46,473 INFO L93 Difference]: Finished difference Result 60825 states and 280291 transitions. [2021-06-12 20:50:46,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:50:46,474 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:50:46,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:46,701 INFO L225 Difference]: With dead ends: 60825 [2021-06-12 20:50:46,701 INFO L226 Difference]: Without dead ends: 59259 [2021-06-12 20:50:46,701 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:50:46,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59259 states. [2021-06-12 20:50:48,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59259 to 52848. [2021-06-12 20:50:48,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52848 states, 52847 states have (on average 4.702499668855375) internal successors, (248513), 52847 states have internal predecessors, (248513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52848 states to 52848 states and 248513 transitions. [2021-06-12 20:50:48,273 INFO L78 Accepts]: Start accepts. Automaton has 52848 states and 248513 transitions. Word has length 41 [2021-06-12 20:50:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:48,274 INFO L482 AbstractCegarLoop]: Abstraction has 52848 states and 248513 transitions. [2021-06-12 20:50:48,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:48,274 INFO L276 IsEmpty]: Start isEmpty. Operand 52848 states and 248513 transitions. [2021-06-12 20:50:48,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:50:48,400 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:48,400 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:50:48,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 20:50:48,602 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:48,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:48,602 INFO L82 PathProgramCache]: Analyzing trace with hash -261664514, now seen corresponding path program 19 times [2021-06-12 20:50:48,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:48,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665460655] [2021-06-12 20:50:48,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:48,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:48,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665460655] [2021-06-12 20:50:48,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665460655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:48,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536661263] [2021-06-12 20:50:48,669 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:49,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:50:49,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:49,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536661263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:49,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:49,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 20:50:49,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931874490] [2021-06-12 20:50:49,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:50:49,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:49,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:50:49,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:50:49,238 INFO L87 Difference]: Start difference. First operand 52848 states and 248513 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:49,726 INFO L93 Difference]: Finished difference Result 64976 states and 299967 transitions. [2021-06-12 20:50:49,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:50:49,726 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:50:49,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:50,240 INFO L225 Difference]: With dead ends: 64976 [2021-06-12 20:50:50,241 INFO L226 Difference]: Without dead ends: 64453 [2021-06-12 20:50:50,241 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:50:50,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64453 states. [2021-06-12 20:50:51,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64453 to 58787. [2021-06-12 20:50:51,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58787 states, 58786 states have (on average 4.700591977681761) internal successors, (276329), 58786 states have internal predecessors, (276329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58787 states to 58787 states and 276329 transitions. [2021-06-12 20:50:51,937 INFO L78 Accepts]: Start accepts. Automaton has 58787 states and 276329 transitions. Word has length 41 [2021-06-12 20:50:51,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:51,937 INFO L482 AbstractCegarLoop]: Abstraction has 58787 states and 276329 transitions. [2021-06-12 20:50:51,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:51,937 INFO L276 IsEmpty]: Start isEmpty. Operand 58787 states and 276329 transitions. [2021-06-12 20:50:52,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:50:52,071 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:52,071 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:50:52,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:52,272 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:52,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:52,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1787747650, now seen corresponding path program 20 times [2021-06-12 20:50:52,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:52,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677185665] [2021-06-12 20:50:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:52,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:52,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677185665] [2021-06-12 20:50:52,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677185665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:52,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245627094] [2021-06-12 20:50:52,339 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:52,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:50:52,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:52,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:50:52,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:50:52,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245627094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:52,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:52,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 20:50:52,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158520681] [2021-06-12 20:50:52,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:50:52,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:52,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:50:52,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:50:52,526 INFO L87 Difference]: Start difference. First operand 58787 states and 276329 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:53,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:53,825 INFO L93 Difference]: Finished difference Result 93655 states and 432022 transitions. [2021-06-12 20:50:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:50:53,825 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:50:53,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:54,169 INFO L225 Difference]: With dead ends: 93655 [2021-06-12 20:50:54,169 INFO L226 Difference]: Without dead ends: 91110 [2021-06-12 20:50:54,169 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:50:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91110 states. [2021-06-12 20:50:56,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91110 to 76620. [2021-06-12 20:50:56,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76620 states, 76619 states have (on average 4.695597697699005) internal successors, (359772), 76619 states have internal predecessors, (359772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:56,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76620 states to 76620 states and 359772 transitions. [2021-06-12 20:50:56,687 INFO L78 Accepts]: Start accepts. Automaton has 76620 states and 359772 transitions. Word has length 41 [2021-06-12 20:50:56,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:56,687 INFO L482 AbstractCegarLoop]: Abstraction has 76620 states and 359772 transitions. [2021-06-12 20:50:56,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:56,687 INFO L276 IsEmpty]: Start isEmpty. Operand 76620 states and 359772 transitions. [2021-06-12 20:50:57,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:50:57,499 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:57,499 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:50:57,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:57,713 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:57,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1211267282, now seen corresponding path program 21 times [2021-06-12 20:50:57,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:57,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8947869] [2021-06-12 20:50:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:57,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:57,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8947869] [2021-06-12 20:50:57,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8947869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:57,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22133435] [2021-06-12 20:50:57,830 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:57,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:50:57,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:57,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:50:57,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:58,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22133435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:58,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:58,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-12 20:50:58,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242622114] [2021-06-12 20:50:58,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:50:58,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:58,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:50:58,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:50:58,080 INFO L87 Difference]: Start difference. First operand 76620 states and 359772 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:00,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:00,230 INFO L93 Difference]: Finished difference Result 163014 states and 750713 transitions. [2021-06-12 20:51:00,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:51:00,245 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:00,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:00,964 INFO L225 Difference]: With dead ends: 163014 [2021-06-12 20:51:00,964 INFO L226 Difference]: Without dead ends: 159428 [2021-06-12 20:51:00,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:51:01,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159428 states. [2021-06-12 20:51:04,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159428 to 126993. [2021-06-12 20:51:05,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126993 states, 126992 states have (on average 4.747724266095502) internal successors, (602923), 126992 states have internal predecessors, (602923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:06,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126993 states to 126993 states and 602923 transitions. [2021-06-12 20:51:06,097 INFO L78 Accepts]: Start accepts. Automaton has 126993 states and 602923 transitions. Word has length 41 [2021-06-12 20:51:06,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:06,097 INFO L482 AbstractCegarLoop]: Abstraction has 126993 states and 602923 transitions. [2021-06-12 20:51:06,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:06,097 INFO L276 IsEmpty]: Start isEmpty. Operand 126993 states and 602923 transitions. [2021-06-12 20:51:06,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:06,913 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:06,913 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:51:07,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-12 20:51:07,114 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:07,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:07,114 INFO L82 PathProgramCache]: Analyzing trace with hash 603954758, now seen corresponding path program 22 times [2021-06-12 20:51:07,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:07,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104960014] [2021-06-12 20:51:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:07,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:07,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:07,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104960014] [2021-06-12 20:51:07,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104960014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:07,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014406692] [2021-06-12 20:51:07,180 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:07,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:51:07,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:07,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:51:07,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:51:07,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014406692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:07,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:07,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 20:51:07,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637749080] [2021-06-12 20:51:07,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:51:07,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:07,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:51:07,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:51:07,332 INFO L87 Difference]: Start difference. First operand 126993 states and 602923 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:08,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:08,985 INFO L93 Difference]: Finished difference Result 156598 states and 736161 transitions. [2021-06-12 20:51:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:51:08,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:08,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:09,687 INFO L225 Difference]: With dead ends: 156598 [2021-06-12 20:51:09,687 INFO L226 Difference]: Without dead ends: 156198 [2021-06-12 20:51:09,687 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:51:09,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156198 states. [2021-06-12 20:51:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156198 to 123212. [2021-06-12 20:51:13,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123212 states, 123211 states have (on average 4.758925745266251) internal successors, (586352), 123211 states have internal predecessors, (586352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123212 states to 123212 states and 586352 transitions. [2021-06-12 20:51:14,776 INFO L78 Accepts]: Start accepts. Automaton has 123212 states and 586352 transitions. Word has length 41 [2021-06-12 20:51:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:14,777 INFO L482 AbstractCegarLoop]: Abstraction has 123212 states and 586352 transitions. [2021-06-12 20:51:14,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 123212 states and 586352 transitions. [2021-06-12 20:51:15,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:15,530 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:15,531 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:51:15,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:15,755 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:15,756 INFO L82 PathProgramCache]: Analyzing trace with hash 295403914, now seen corresponding path program 23 times [2021-06-12 20:51:15,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:15,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91330244] [2021-06-12 20:51:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:15,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:15,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91330244] [2021-06-12 20:51:15,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91330244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:15,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168033239] [2021-06-12 20:51:15,826 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:15,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:51:15,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:15,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:51:15,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:51:15,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168033239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:15,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:15,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 20:51:16,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783623512] [2021-06-12 20:51:16,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:51:16,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:16,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:51:16,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:51:16,001 INFO L87 Difference]: Start difference. First operand 123212 states and 586352 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:17,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:17,853 INFO L93 Difference]: Finished difference Result 166888 states and 780472 transitions. [2021-06-12 20:51:17,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:51:17,854 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:18,572 INFO L225 Difference]: With dead ends: 166888 [2021-06-12 20:51:18,572 INFO L226 Difference]: Without dead ends: 163861 [2021-06-12 20:51:18,572 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:51:18,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163861 states. [2021-06-12 20:51:22,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163861 to 96217. [2021-06-12 20:51:22,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96217 states, 96216 states have (on average 4.736894071672071) internal successors, (455765), 96216 states have internal predecessors, (455765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:22,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96217 states to 96217 states and 455765 transitions. [2021-06-12 20:51:22,940 INFO L78 Accepts]: Start accepts. Automaton has 96217 states and 455765 transitions. Word has length 41 [2021-06-12 20:51:22,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:22,941 INFO L482 AbstractCegarLoop]: Abstraction has 96217 states and 455765 transitions. [2021-06-12 20:51:22,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:22,941 INFO L276 IsEmpty]: Start isEmpty. Operand 96217 states and 455765 transitions. [2021-06-12 20:51:23,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:23,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:23,678 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:51:23,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 20:51:23,893 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:23,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:23,893 INFO L82 PathProgramCache]: Analyzing trace with hash -904179714, now seen corresponding path program 24 times [2021-06-12 20:51:23,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:23,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619148956] [2021-06-12 20:51:23,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:23,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:23,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619148956] [2021-06-12 20:51:23,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619148956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:23,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685659805] [2021-06-12 20:51:23,956 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:24,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:51:24,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:24,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:51:24,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:24,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685659805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:24,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:24,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 20:51:24,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407292730] [2021-06-12 20:51:24,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:51:24,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:24,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:51:24,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:51:24,136 INFO L87 Difference]: Start difference. First operand 96217 states and 455765 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:25,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:25,409 INFO L93 Difference]: Finished difference Result 118313 states and 543700 transitions. [2021-06-12 20:51:25,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:51:25,410 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:25,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:26,280 INFO L225 Difference]: With dead ends: 118313 [2021-06-12 20:51:26,280 INFO L226 Difference]: Without dead ends: 118079 [2021-06-12 20:51:26,283 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:51:26,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118079 states. [2021-06-12 20:51:29,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118079 to 101978. [2021-06-12 20:51:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101978 states, 101977 states have (on average 4.717151906802514) internal successors, (481041), 101977 states have internal predecessors, (481041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:29,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101978 states to 101978 states and 481041 transitions. [2021-06-12 20:51:29,905 INFO L78 Accepts]: Start accepts. Automaton has 101978 states and 481041 transitions. Word has length 41 [2021-06-12 20:51:29,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:29,905 INFO L482 AbstractCegarLoop]: Abstraction has 101978 states and 481041 transitions. [2021-06-12 20:51:29,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:29,905 INFO L276 IsEmpty]: Start isEmpty. Operand 101978 states and 481041 transitions. [2021-06-12 20:51:30,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:30,637 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:30,637 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:51:30,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 20:51:30,853 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:30,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:30,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1636006098, now seen corresponding path program 25 times [2021-06-12 20:51:30,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:30,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018853316] [2021-06-12 20:51:30,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:30,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:30,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018853316] [2021-06-12 20:51:30,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018853316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:30,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778028256] [2021-06-12 20:51:30,922 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:30,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:51:30,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:31,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778028256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:31,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:31,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-12 20:51:31,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064385650] [2021-06-12 20:51:31,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:51:31,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:31,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:51:31,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:51:31,114 INFO L87 Difference]: Start difference. First operand 101978 states and 481041 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:32,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:32,246 INFO L93 Difference]: Finished difference Result 131320 states and 606130 transitions. [2021-06-12 20:51:32,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:51:32,247 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:32,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:33,163 INFO L225 Difference]: With dead ends: 131320 [2021-06-12 20:51:33,163 INFO L226 Difference]: Without dead ends: 130644 [2021-06-12 20:51:33,163 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:51:33,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130644 states. [2021-06-12 20:51:36,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130644 to 113668. [2021-06-12 20:51:36,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113668 states, 113667 states have (on average 4.706968601265099) internal successors, (535027), 113667 states have internal predecessors, (535027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113668 states to 113668 states and 535027 transitions. [2021-06-12 20:51:36,798 INFO L78 Accepts]: Start accepts. Automaton has 113668 states and 535027 transitions. Word has length 41 [2021-06-12 20:51:36,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:36,798 INFO L482 AbstractCegarLoop]: Abstraction has 113668 states and 535027 transitions. [2021-06-12 20:51:36,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 113668 states and 535027 transitions. [2021-06-12 20:51:37,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:37,538 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:37,538 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:51:37,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 20:51:37,738 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:37,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:37,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1028693574, now seen corresponding path program 26 times [2021-06-12 20:51:37,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:37,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724925981] [2021-06-12 20:51:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:37,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:37,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:37,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724925981] [2021-06-12 20:51:37,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724925981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:37,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40819200] [2021-06-12 20:51:37,801 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:37,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:51:37,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:37,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:51:37,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:37,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40819200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:37,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:37,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:51:37,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876256995] [2021-06-12 20:51:37,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:51:37,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:37,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:51:37,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:51:37,972 INFO L87 Difference]: Start difference. First operand 113668 states and 535027 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:39,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:39,555 INFO L93 Difference]: Finished difference Result 140482 states and 651032 transitions. [2021-06-12 20:51:39,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:51:39,556 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:39,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:40,158 INFO L225 Difference]: With dead ends: 140482 [2021-06-12 20:51:40,158 INFO L226 Difference]: Without dead ends: 139756 [2021-06-12 20:51:40,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:51:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139756 states. [2021-06-12 20:51:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139756 to 118405. [2021-06-12 20:51:43,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118405 states, 118404 states have (on average 4.725110638154116) internal successors, (559472), 118404 states have internal predecessors, (559472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:44,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118405 states to 118405 states and 559472 transitions. [2021-06-12 20:51:44,480 INFO L78 Accepts]: Start accepts. Automaton has 118405 states and 559472 transitions. Word has length 41 [2021-06-12 20:51:44,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:44,481 INFO L482 AbstractCegarLoop]: Abstraction has 118405 states and 559472 transitions. [2021-06-12 20:51:44,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:44,481 INFO L276 IsEmpty]: Start isEmpty. Operand 118405 states and 559472 transitions. [2021-06-12 20:51:44,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:44,796 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:44,796 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:51:44,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 20:51:44,997 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:44,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:44,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1153866818, now seen corresponding path program 27 times [2021-06-12 20:51:44,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:44,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26676352] [2021-06-12 20:51:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:45,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:45,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26676352] [2021-06-12 20:51:45,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26676352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:45,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733882910] [2021-06-12 20:51:45,083 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:45,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:51:45,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:45,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:51:45,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:51:45,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733882910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:45,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:45,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 20:51:45,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728924795] [2021-06-12 20:51:45,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:51:45,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:45,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:51:45,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:51:45,610 INFO L87 Difference]: Start difference. First operand 118405 states and 559472 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:47,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:47,400 INFO L93 Difference]: Finished difference Result 186146 states and 866917 transitions. [2021-06-12 20:51:47,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:51:47,401 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:47,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:48,220 INFO L225 Difference]: With dead ends: 186146 [2021-06-12 20:51:48,220 INFO L226 Difference]: Without dead ends: 183395 [2021-06-12 20:51:48,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:51:48,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183395 states. [2021-06-12 20:51:53,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183395 to 148831. [2021-06-12 20:51:54,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148831 states, 148830 states have (on average 4.731868574884096) internal successors, (704244), 148830 states have internal predecessors, (704244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148831 states to 148831 states and 704244 transitions. [2021-06-12 20:51:55,876 INFO L78 Accepts]: Start accepts. Automaton has 148831 states and 704244 transitions. Word has length 41 [2021-06-12 20:51:55,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:55,876 INFO L482 AbstractCegarLoop]: Abstraction has 148831 states and 704244 transitions. [2021-06-12 20:51:55,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 148831 states and 704244 transitions. [2021-06-12 20:51:56,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:56,815 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:56,815 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:51:57,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 20:51:57,045 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:57,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:57,045 INFO L82 PathProgramCache]: Analyzing trace with hash 577386450, now seen corresponding path program 28 times [2021-06-12 20:51:57,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:57,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289872735] [2021-06-12 20:51:57,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:57,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:57,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289872735] [2021-06-12 20:51:57,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289872735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:57,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365646548] [2021-06-12 20:51:57,142 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:57,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:51:57,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:57,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:51:57,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:57,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365646548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:57,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:57,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 20:51:57,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64538080] [2021-06-12 20:51:57,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:51:57,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:57,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:51:57,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:51:57,336 INFO L87 Difference]: Start difference. First operand 148831 states and 704244 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:52:00,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:52:00,648 INFO L93 Difference]: Finished difference Result 327820 states and 1534054 transitions. [2021-06-12 20:52:00,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:52:00,649 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:52:00,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:52:02,614 INFO L225 Difference]: With dead ends: 327820 [2021-06-12 20:52:02,614 INFO L226 Difference]: Without dead ends: 324633 [2021-06-12 20:52:02,615 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 527.6ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:52:03,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324633 states. [2021-06-12 20:52:13,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324633 to 239665. [2021-06-12 20:52:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239665 states, 239664 states have (on average 4.810242673075639) internal successors, (1152842), 239664 states have internal predecessors, (1152842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:52:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239665 states to 239665 states and 1152842 transitions. [2021-06-12 20:52:16,097 INFO L78 Accepts]: Start accepts. Automaton has 239665 states and 1152842 transitions. Word has length 41 [2021-06-12 20:52:16,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:52:16,098 INFO L482 AbstractCegarLoop]: Abstraction has 239665 states and 1152842 transitions. [2021-06-12 20:52:16,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:52:16,098 INFO L276 IsEmpty]: Start isEmpty. Operand 239665 states and 1152842 transitions. [2021-06-12 20:52:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:52:17,533 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:52:17,533 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:52:17,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:52:17,749 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:52:17,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:52:17,749 INFO L82 PathProgramCache]: Analyzing trace with hash -29926074, now seen corresponding path program 29 times [2021-06-12 20:52:17,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:52:17,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837973868] [2021-06-12 20:52:17,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:52:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:52:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:52:17,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:52:17,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837973868] [2021-06-12 20:52:17,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837973868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:52:17,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723348252] [2021-06-12 20:52:17,862 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:52:17,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:52:17,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:52:17,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:52:17,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:52:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:52:18,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723348252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:52:18,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:52:18,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 20:52:18,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698970632] [2021-06-12 20:52:18,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:52:18,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:52:18,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:52:18,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:52:18,095 INFO L87 Difference]: Start difference. First operand 239665 states and 1152842 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:52:22,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:52:22,484 INFO L93 Difference]: Finished difference Result 283707 states and 1353356 transitions. [2021-06-12 20:52:22,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:52:22,485 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:52:22,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:52:25,297 INFO L225 Difference]: With dead ends: 283707 [2021-06-12 20:52:25,298 INFO L226 Difference]: Without dead ends: 283245 [2021-06-12 20:52:25,298 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:52:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283245 states. [2021-06-12 20:52:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283245 to 208767. [2021-06-12 20:52:33,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208767 states, 208766 states have (on average 4.808431449565543) internal successors, (1003837), 208766 states have internal predecessors, (1003837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:52:36,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208767 states to 208767 states and 1003837 transitions. [2021-06-12 20:52:36,023 INFO L78 Accepts]: Start accepts. Automaton has 208767 states and 1003837 transitions. Word has length 41 [2021-06-12 20:52:36,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:52:36,023 INFO L482 AbstractCegarLoop]: Abstraction has 208767 states and 1003837 transitions. [2021-06-12 20:52:36,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:52:36,024 INFO L276 IsEmpty]: Start isEmpty. Operand 208767 states and 1003837 transitions. [2021-06-12 20:52:37,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:52:37,018 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:52:37,018 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:52:37,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 20:52:37,243 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:52:37,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:52:37,243 INFO L82 PathProgramCache]: Analyzing trace with hash -338476918, now seen corresponding path program 30 times [2021-06-12 20:52:37,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:52:37,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631124744] [2021-06-12 20:52:37,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:52:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:52:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:52:37,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:52:37,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631124744] [2021-06-12 20:52:37,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631124744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:52:37,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405923721] [2021-06-12 20:52:37,327 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:52:37,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:52:37,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:52:37,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:52:37,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:52:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:52:37,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405923721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:52:37,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:52:37,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 20:52:37,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671437983] [2021-06-12 20:52:37,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:52:37,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:52:37,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:52:37,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:52:37,488 INFO L87 Difference]: Start difference. First operand 208767 states and 1003837 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:52:40,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:52:40,979 INFO L93 Difference]: Finished difference Result 263379 states and 1254429 transitions. [2021-06-12 20:52:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:52:40,980 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:52:40,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:52:43,469 INFO L225 Difference]: With dead ends: 263379 [2021-06-12 20:52:43,469 INFO L226 Difference]: Without dead ends: 260502 [2021-06-12 20:52:43,469 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:52:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260502 states. [2021-06-12 20:52:49,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260502 to 116427. [2021-06-12 20:52:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116427 states, 116426 states have (on average 4.769922525896278) internal successors, (555343), 116426 states have internal predecessors, (555343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:52:50,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116427 states to 116427 states and 555343 transitions. [2021-06-12 20:52:50,243 INFO L78 Accepts]: Start accepts. Automaton has 116427 states and 555343 transitions. Word has length 41 [2021-06-12 20:52:50,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:52:50,243 INFO L482 AbstractCegarLoop]: Abstraction has 116427 states and 555343 transitions. [2021-06-12 20:52:50,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:52:50,244 INFO L276 IsEmpty]: Start isEmpty. Operand 116427 states and 555343 transitions. [2021-06-12 20:52:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:52:50,609 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:52:50,609 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:52:50,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-12 20:52:50,809 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:52:50,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:52:50,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1886674710, now seen corresponding path program 31 times [2021-06-12 20:52:50,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:52:50,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134301257] [2021-06-12 20:52:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:52:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:52:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:52:50,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:52:50,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134301257] [2021-06-12 20:52:50,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134301257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:52:50,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329050697] [2021-06-12 20:52:50,863 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:52:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:52:50,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:52:50,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:52:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:52:50,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329050697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:52:50,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:52:50,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-12 20:52:50,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862630480] [2021-06-12 20:52:51,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:52:51,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:52:51,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:52:51,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:52:51,000 INFO L87 Difference]: Start difference. First operand 116427 states and 555343 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:52:53,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:52:53,055 INFO L93 Difference]: Finished difference Result 223049 states and 1035432 transitions. [2021-06-12 20:52:53,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:52:53,056 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:52:53,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:52:54,529 INFO L225 Difference]: With dead ends: 223049 [2021-06-12 20:52:54,530 INFO L226 Difference]: Without dead ends: 220377 [2021-06-12 20:52:54,530 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:52:55,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220377 states. [2021-06-12 20:53:00,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220377 to 155837. [2021-06-12 20:53:00,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155837 states, 155836 states have (on average 4.806129520778254) internal successors, (748968), 155836 states have internal predecessors, (748968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:02,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155837 states to 155837 states and 748968 transitions. [2021-06-12 20:53:02,228 INFO L78 Accepts]: Start accepts. Automaton has 155837 states and 748968 transitions. Word has length 41 [2021-06-12 20:53:02,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:02,228 INFO L482 AbstractCegarLoop]: Abstraction has 155837 states and 748968 transitions. [2021-06-12 20:53:02,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 155837 states and 748968 transitions. [2021-06-12 20:53:03,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:53:03,125 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:03,125 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:53:03,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:03,349 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:03,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:03,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1658788934, now seen corresponding path program 32 times [2021-06-12 20:53:03,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:03,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397520873] [2021-06-12 20:53:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:03,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:03,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397520873] [2021-06-12 20:53:03,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397520873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:03,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145552776] [2021-06-12 20:53:03,425 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:03,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:53:03,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:03,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:53:03,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:53:03,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145552776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:03,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:03,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 20:53:03,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157242165] [2021-06-12 20:53:03,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:53:03,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:03,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:53:03,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:53:03,583 INFO L87 Difference]: Start difference. First operand 155837 states and 748968 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:06,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:06,397 INFO L93 Difference]: Finished difference Result 212915 states and 1012751 transitions. [2021-06-12 20:53:06,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:53:06,398 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:53:06,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:08,611 INFO L225 Difference]: With dead ends: 212915 [2021-06-12 20:53:08,612 INFO L226 Difference]: Without dead ends: 210423 [2021-06-12 20:53:08,612 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:53:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210423 states. [2021-06-12 20:53:14,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210423 to 174189. [2021-06-12 20:53:15,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174189 states, 174188 states have (on average 4.835143637908467) internal successors, (842224), 174188 states have internal predecessors, (842224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174189 states to 174189 states and 842224 transitions. [2021-06-12 20:53:16,969 INFO L78 Accepts]: Start accepts. Automaton has 174189 states and 842224 transitions. Word has length 41 [2021-06-12 20:53:16,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:16,969 INFO L482 AbstractCegarLoop]: Abstraction has 174189 states and 842224 transitions. [2021-06-12 20:53:16,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:16,969 INFO L276 IsEmpty]: Start isEmpty. Operand 174189 states and 842224 transitions. [2021-06-12 20:53:17,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:53:17,511 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:17,511 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:53:17,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-12 20:53:17,712 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:17,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:17,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2084693554, now seen corresponding path program 33 times [2021-06-12 20:53:17,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:17,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767803455] [2021-06-12 20:53:17,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:17,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:17,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767803455] [2021-06-12 20:53:17,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767803455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:17,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411867211] [2021-06-12 20:53:17,791 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:17,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:53:17,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:17,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:53:17,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:17,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411867211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:17,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:17,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:53:17,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355626788] [2021-06-12 20:53:17,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:53:17,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:17,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:53:17,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:53:17,953 INFO L87 Difference]: Start difference. First operand 174189 states and 842224 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:22,737 INFO L93 Difference]: Finished difference Result 397194 states and 1899439 transitions. [2021-06-12 20:53:22,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:53:22,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:53:22,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:25,309 INFO L225 Difference]: With dead ends: 397194 [2021-06-12 20:53:25,309 INFO L226 Difference]: Without dead ends: 393877 [2021-06-12 20:53:25,310 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:53:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393877 states. [2021-06-12 20:53:39,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393877 to 269480. [2021-06-12 20:53:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269480 states, 269479 states have (on average 4.951157604117575) internal successors, (1334233), 269479 states have internal predecessors, (1334233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269480 states to 269480 states and 1334233 transitions. [2021-06-12 20:53:43,572 INFO L78 Accepts]: Start accepts. Automaton has 269480 states and 1334233 transitions. Word has length 41 [2021-06-12 20:53:43,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:53:43,573 INFO L482 AbstractCegarLoop]: Abstraction has 269480 states and 1334233 transitions. [2021-06-12 20:53:43,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 269480 states and 1334233 transitions. [2021-06-12 20:53:45,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:53:45,540 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:53:45,540 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:53:45,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:45,757 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:53:45,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:53:45,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1494171274, now seen corresponding path program 34 times [2021-06-12 20:53:45,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:53:45,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276099834] [2021-06-12 20:53:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:53:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:53:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:53:45,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:53:45,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276099834] [2021-06-12 20:53:45,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276099834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:45,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929721370] [2021-06-12 20:53:45,871 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:53:45,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:53:45,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:53:45,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:53:45,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:53:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:53:46,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929721370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:53:46,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:53:46,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 20:53:46,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578795197] [2021-06-12 20:53:46,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:53:46,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:53:46,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:53:46,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:53:46,113 INFO L87 Difference]: Start difference. First operand 269480 states and 1334233 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:53:51,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:53:51,047 INFO L93 Difference]: Finished difference Result 316931 states and 1549745 transitions. [2021-06-12 20:53:51,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:53:51,047 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:53:51,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:53:54,282 INFO L225 Difference]: With dead ends: 316931 [2021-06-12 20:53:54,283 INFO L226 Difference]: Without dead ends: 316481 [2021-06-12 20:53:54,283 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:53:54,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316481 states. [2021-06-12 20:54:05,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316481 to 205144. [2021-06-12 20:54:05,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205144 states, 205143 states have (on average 4.904305776945837) internal successors, (1006084), 205143 states have internal predecessors, (1006084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205144 states to 205144 states and 1006084 transitions. [2021-06-12 20:54:07,574 INFO L78 Accepts]: Start accepts. Automaton has 205144 states and 1006084 transitions. Word has length 41 [2021-06-12 20:54:07,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:07,574 INFO L482 AbstractCegarLoop]: Abstraction has 205144 states and 1006084 transitions. [2021-06-12 20:54:07,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:07,574 INFO L276 IsEmpty]: Start isEmpty. Operand 205144 states and 1006084 transitions. [2021-06-12 20:54:08,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:54:08,571 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:08,571 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1] [2021-06-12 20:54:08,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-12 20:54:08,793 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:08,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:08,793 INFO L82 PathProgramCache]: Analyzing trace with hash 518963082, now seen corresponding path program 35 times [2021-06-12 20:54:08,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:08,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86112731] [2021-06-12 20:54:08,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:54:08,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:08,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86112731] [2021-06-12 20:54:08,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86112731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:08,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448510928] [2021-06-12 20:54:08,875 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:54:08,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:54:08,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:08,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:54:08,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:54:09,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448510928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:09,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:09,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 20:54:09,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870544192] [2021-06-12 20:54:09,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:54:09,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:09,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:54:09,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:54:09,045 INFO L87 Difference]: Start difference. First operand 205144 states and 1006084 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:13,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:13,413 INFO L93 Difference]: Finished difference Result 351280 states and 1697991 transitions. [2021-06-12 20:54:13,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:54:13,413 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:54:13,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:17,248 INFO L225 Difference]: With dead ends: 351280 [2021-06-12 20:54:17,248 INFO L226 Difference]: Without dead ends: 347746 [2021-06-12 20:54:17,249 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:54:18,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347746 states. [2021-06-12 20:54:30,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347746 to 266100. [2021-06-12 20:54:30,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266100 states, 266099 states have (on average 4.991721126347713) internal successors, (1328292), 266099 states have internal predecessors, (1328292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:33,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266100 states to 266100 states and 1328292 transitions. [2021-06-12 20:54:33,502 INFO L78 Accepts]: Start accepts. Automaton has 266100 states and 1328292 transitions. Word has length 41 [2021-06-12 20:54:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:54:33,502 INFO L482 AbstractCegarLoop]: Abstraction has 266100 states and 1328292 transitions. [2021-06-12 20:54:33,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 266100 states and 1328292 transitions. [2021-06-12 20:54:34,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 20:54:34,756 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:54:34,756 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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, 1] [2021-06-12 20:54:34,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-12 20:54:34,969 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:54:34,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:54:34,969 INFO L82 PathProgramCache]: Analyzing trace with hash 445372220, now seen corresponding path program 36 times [2021-06-12 20:54:34,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:54:34,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707117046] [2021-06-12 20:54:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:54:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:54:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:54:35,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:54:35,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707117046] [2021-06-12 20:54:35,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707117046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:35,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456185102] [2021-06-12 20:54:35,037 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:54:35,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:54:35,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:54:35,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:54:35,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:54:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:54:35,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456185102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:54:35,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:54:35,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:54:35,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791315892] [2021-06-12 20:54:35,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:54:35,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:54:35,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:54:35,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:54:35,225 INFO L87 Difference]: Start difference. First operand 266100 states and 1328292 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 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 20:54:42,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:54:42,193 INFO L93 Difference]: Finished difference Result 517007 states and 2493362 transitions. [2021-06-12 20:54:42,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:54:42,193 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 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 43 [2021-06-12 20:54:42,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:54:48,320 INFO L225 Difference]: With dead ends: 517007 [2021-06-12 20:54:48,321 INFO L226 Difference]: Without dead ends: 515961 [2021-06-12 20:54:48,321 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 392.1ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:54:49,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515961 states. [2021-06-12 20:55:00,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515961 to 210221. [2021-06-12 20:55:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210221 states, 210220 states have (on average 4.792717153458282) internal successors, (1007525), 210220 states have internal predecessors, (1007525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210221 states to 210221 states and 1007525 transitions. [2021-06-12 20:55:02,811 INFO L78 Accepts]: Start accepts. Automaton has 210221 states and 1007525 transitions. Word has length 43 [2021-06-12 20:55:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:02,811 INFO L482 AbstractCegarLoop]: Abstraction has 210221 states and 1007525 transitions. [2021-06-12 20:55:02,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 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 20:55:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 210221 states and 1007525 transitions. [2021-06-12 20:55:04,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 20:55:04,185 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:04,185 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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, 1] [2021-06-12 20:55:04,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 20:55:04,407 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:04,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:04,407 INFO L82 PathProgramCache]: Analyzing trace with hash -172125824, now seen corresponding path program 37 times [2021-06-12 20:55:04,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:04,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893205232] [2021-06-12 20:55:04,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:55:04,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:04,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893205232] [2021-06-12 20:55:04,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893205232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:04,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193178927] [2021-06-12 20:55:04,479 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:55:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:04,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:55:04,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:55:04,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193178927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:04,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:04,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-12 20:55:04,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659315696] [2021-06-12 20:55:04,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:55:04,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:04,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:55:04,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:55:04,646 INFO L87 Difference]: Start difference. First operand 210221 states and 1007525 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:11,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:55:11,769 INFO L93 Difference]: Finished difference Result 490894 states and 2284771 transitions. [2021-06-12 20:55:11,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:55:11,769 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-12 20:55:11,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:55:16,822 INFO L225 Difference]: With dead ends: 490894 [2021-06-12 20:55:16,822 INFO L226 Difference]: Without dead ends: 487402 [2021-06-12 20:55:16,837 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 403.0ms TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:55:17,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487402 states. [2021-06-12 20:55:33,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487402 to 245403. [2021-06-12 20:55:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245403 states, 245402 states have (on average 4.805160512139265) internal successors, (1179196), 245402 states have internal predecessors, (1179196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245403 states to 245403 states and 1179196 transitions. [2021-06-12 20:55:35,884 INFO L78 Accepts]: Start accepts. Automaton has 245403 states and 1179196 transitions. Word has length 43 [2021-06-12 20:55:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:35,884 INFO L482 AbstractCegarLoop]: Abstraction has 245403 states and 1179196 transitions. [2021-06-12 20:55:35,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:35,885 INFO L276 IsEmpty]: Start isEmpty. Operand 245403 states and 1179196 transitions. [2021-06-12 20:55:37,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 20:55:37,113 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:37,113 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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, 1] [2021-06-12 20:55:37,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 20:55:37,338 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:37,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:37,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1881822596, now seen corresponding path program 38 times [2021-06-12 20:55:37,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:37,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394996838] [2021-06-12 20:55:37,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:55:37,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:37,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394996838] [2021-06-12 20:55:37,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394996838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:37,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723137688] [2021-06-12 20:55:37,386 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:55:37,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:55:37,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:55:37,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:55:37,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:55:37,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723137688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:37,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:37,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:55:37,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692127149] [2021-06-12 20:55:37,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:55:37,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:37,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:55:37,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:55:37,559 INFO L87 Difference]: Start difference. First operand 245403 states and 1179196 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 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 20:55:43,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:55:43,304 INFO L93 Difference]: Finished difference Result 401083 states and 1918180 transitions. [2021-06-12 20:55:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:55:43,305 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 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 43 [2021-06-12 20:55:43,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:55:46,931 INFO L225 Difference]: With dead ends: 401083 [2021-06-12 20:55:46,931 INFO L226 Difference]: Without dead ends: 400185 [2021-06-12 20:55:46,932 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:55:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400185 states. [2021-06-12 20:55:54,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400185 to 102134. [2021-06-12 20:55:55,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102134 states, 102133 states have (on average 4.781363516199465) internal successors, (488335), 102133 states have internal predecessors, (488335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:55:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102134 states to 102134 states and 488335 transitions. [2021-06-12 20:55:55,571 INFO L78 Accepts]: Start accepts. Automaton has 102134 states and 488335 transitions. Word has length 43 [2021-06-12 20:55:55,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:55:55,571 INFO L482 AbstractCegarLoop]: Abstraction has 102134 states and 488335 transitions. [2021-06-12 20:55:55,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 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 20:55:55,572 INFO L276 IsEmpty]: Start isEmpty. Operand 102134 states and 488335 transitions. [2021-06-12 20:55:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 20:55:56,243 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:55:56,243 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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, 1] [2021-06-12 20:55:56,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:55:56,468 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:55:56,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:55:56,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1183096580, now seen corresponding path program 39 times [2021-06-12 20:55:56,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:55:56,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072717389] [2021-06-12 20:55:56,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:55:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:55:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:55:56,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:55:56,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072717389] [2021-06-12 20:55:56,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072717389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:56,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219015286] [2021-06-12 20:55:56,527 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:55:56,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:55:56,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:55:56,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:55:56,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:55:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:55:56,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219015286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:55:56,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:55:56,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 20:55:56,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293558291] [2021-06-12 20:55:56,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:55:56,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:55:56,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:55:56,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:55:56,677 INFO L87 Difference]: Start difference. First operand 102134 states and 488335 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 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 20:55:57,639 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-06-12 20:56:01,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:56:01,189 INFO L93 Difference]: Finished difference Result 359669 states and 1677307 transitions. [2021-06-12 20:56:01,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 20:56:01,189 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 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 43 [2021-06-12 20:56:01,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:56:03,898 INFO L225 Difference]: With dead ends: 359669 [2021-06-12 20:56:03,899 INFO L226 Difference]: Without dead ends: 358139 [2021-06-12 20:56:03,901 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 1038.9ms TimeCoverageRelationStatistics Valid=1034, Invalid=4222, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 20:56:04,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358139 states. [2021-06-12 20:56:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358139 to 139202. [2021-06-12 20:56:12,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139202 states, 139201 states have (on average 4.859584342066508) internal successors, (676459), 139201 states have internal predecessors, (676459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:14,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139202 states to 139202 states and 676459 transitions. [2021-06-12 20:56:14,053 INFO L78 Accepts]: Start accepts. Automaton has 139202 states and 676459 transitions. Word has length 43 [2021-06-12 20:56:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:56:14,053 INFO L482 AbstractCegarLoop]: Abstraction has 139202 states and 676459 transitions. [2021-06-12 20:56:14,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 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 20:56:14,054 INFO L276 IsEmpty]: Start isEmpty. Operand 139202 states and 676459 transitions. [2021-06-12 20:56:14,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-12 20:56:14,627 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:56:14,627 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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, 1] [2021-06-12 20:56:14,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 20:56:14,841 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:56:14,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:56:14,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1105009528, now seen corresponding path program 40 times [2021-06-12 20:56:14,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:56:14,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472127426] [2021-06-12 20:56:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:56:14,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:56:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:56:14,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:56:14,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472127426] [2021-06-12 20:56:14,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472127426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:14,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081513219] [2021-06-12 20:56:14,915 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:56:14,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:56:14,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:56:14,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:56:14,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:56:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:56:15,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081513219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:15,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:56:15,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-12 20:56:15,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138043811] [2021-06-12 20:56:15,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:56:15,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:56:15,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:56:15,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:56:15,126 INFO L87 Difference]: Start difference. First operand 139202 states and 676459 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 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 20:56:15,677 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2021-06-12 20:56:19,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:56:19,557 INFO L93 Difference]: Finished difference Result 318028 states and 1526515 transitions. [2021-06-12 20:56:19,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:56:19,557 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 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 43 [2021-06-12 20:56:19,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:56:21,552 INFO L225 Difference]: With dead ends: 318028 [2021-06-12 20:56:21,553 INFO L226 Difference]: Without dead ends: 317616 [2021-06-12 20:56:21,553 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 758.0ms TimeCoverageRelationStatistics Valid=359, Invalid=901, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:56:22,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317616 states. [2021-06-12 20:56:28,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317616 to 168176. [2021-06-12 20:56:28,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168176 states, 168175 states have (on average 4.916592834844656) internal successors, (826848), 168175 states have internal predecessors, (826848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:30,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168176 states to 168176 states and 826848 transitions. [2021-06-12 20:56:30,188 INFO L78 Accepts]: Start accepts. Automaton has 168176 states and 826848 transitions. Word has length 43 [2021-06-12 20:56:30,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:56:30,188 INFO L482 AbstractCegarLoop]: Abstraction has 168176 states and 826848 transitions. [2021-06-12 20:56:30,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 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 20:56:30,188 INFO L276 IsEmpty]: Start isEmpty. Operand 168176 states and 826848 transitions. [2021-06-12 20:56:31,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 20:56:31,527 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:56:31,527 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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, 1] [2021-06-12 20:56:31,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:56:31,757 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:56:31,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:56:31,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1379806714, now seen corresponding path program 41 times [2021-06-12 20:56:31,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:56:31,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951761138] [2021-06-12 20:56:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:56:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:56:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 20:56:31,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:56:31,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951761138] [2021-06-12 20:56:31,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951761138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:31,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094464283] [2021-06-12 20:56:31,863 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:56:31,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:56:31,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:56:31,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:56:31,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:56:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 20:56:32,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094464283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:56:32,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:56:32,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 20:56:32,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389807083] [2021-06-12 20:56:32,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:56:32,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:56:32,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:56:32,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:56:32,082 INFO L87 Difference]: Start difference. First operand 168176 states and 826848 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:56:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:56:40,746 INFO L93 Difference]: Finished difference Result 593260 states and 2867141 transitions. [2021-06-12 20:56:40,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:56:40,749 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-12 20:56:40,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:56:45,372 INFO L225 Difference]: With dead ends: 593260 [2021-06-12 20:56:45,372 INFO L226 Difference]: Without dead ends: 584415 [2021-06-12 20:56:45,372 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 551.2ms TimeCoverageRelationStatistics Valid=593, Invalid=1663, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:56:46,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584415 states. [2021-06-12 20:56:58,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584415 to 206454. [2021-06-12 20:56:58,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206454 states, 206453 states have (on average 4.905571728189951) internal successors, (1012770), 206453 states have internal predecessors, (1012770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206454 states to 206454 states and 1012770 transitions. [2021-06-12 20:57:01,335 INFO L78 Accepts]: Start accepts. Automaton has 206454 states and 1012770 transitions. Word has length 45 [2021-06-12 20:57:01,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:57:01,335 INFO L482 AbstractCegarLoop]: Abstraction has 206454 states and 1012770 transitions. [2021-06-12 20:57:01,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:01,341 INFO L276 IsEmpty]: Start isEmpty. Operand 206454 states and 1012770 transitions. [2021-06-12 20:57:02,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 20:57:02,500 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:57:02,500 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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, 1] [2021-06-12 20:57:02,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:57:02,714 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:57:02,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:57:02,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1913141946, now seen corresponding path program 42 times [2021-06-12 20:57:02,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:57:02,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072615496] [2021-06-12 20:57:02,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:57:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:57:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 20:57:02,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:57:02,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072615496] [2021-06-12 20:57:02,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072615496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:02,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369155235] [2021-06-12 20:57:02,766 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:57:02,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:57:02,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:57:02,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:57:02,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:57:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 20:57:02,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369155235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:02,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:57:02,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-12 20:57:02,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226750764] [2021-06-12 20:57:03,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:57:03,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:57:03,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:57:03,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:57:03,000 INFO L87 Difference]: Start difference. First operand 206454 states and 1012770 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:12,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:57:12,684 INFO L93 Difference]: Finished difference Result 489163 states and 2277599 transitions. [2021-06-12 20:57:12,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-12 20:57:12,697 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-12 20:57:12,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:57:18,004 INFO L225 Difference]: With dead ends: 489163 [2021-06-12 20:57:18,005 INFO L226 Difference]: Without dead ends: 486417 [2021-06-12 20:57:18,006 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4571 ImplicationChecksByTransitivity, 1790.9ms TimeCoverageRelationStatistics Valid=2313, Invalid=8607, Unknown=0, NotChecked=0, Total=10920 [2021-06-12 20:57:18,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486417 states. [2021-06-12 20:57:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486417 to 219978. [2021-06-12 20:57:31,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219978 states, 219977 states have (on average 4.848534164935425) internal successors, (1066566), 219977 states have internal predecessors, (1066566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:33,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219978 states to 219978 states and 1066566 transitions. [2021-06-12 20:57:33,709 INFO L78 Accepts]: Start accepts. Automaton has 219978 states and 1066566 transitions. Word has length 45 [2021-06-12 20:57:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:57:33,709 INFO L482 AbstractCegarLoop]: Abstraction has 219978 states and 1066566 transitions. [2021-06-12 20:57:33,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:33,709 INFO L276 IsEmpty]: Start isEmpty. Operand 219978 states and 1066566 transitions. [2021-06-12 20:57:34,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 20:57:34,820 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:57:34,820 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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, 1] [2021-06-12 20:57:35,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-12 20:57:35,045 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:57:35,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:57:35,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1307644630, now seen corresponding path program 43 times [2021-06-12 20:57:35,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:57:35,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994585407] [2021-06-12 20:57:35,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:57:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:57:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 20:57:35,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:57:35,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994585407] [2021-06-12 20:57:35,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994585407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:35,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595369195] [2021-06-12 20:57:35,091 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:57:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:57:35,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:57:35,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:57:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:57:35,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595369195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:35,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:57:35,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-12 20:57:35,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022972983] [2021-06-12 20:57:35,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:57:35,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:57:35,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:57:35,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:57:35,255 INFO L87 Difference]: Start difference. First operand 219978 states and 1066566 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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 20:57:39,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:57:39,613 INFO L93 Difference]: Finished difference Result 345677 states and 1612298 transitions. [2021-06-12 20:57:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:57:39,614 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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 45 [2021-06-12 20:57:39,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:57:43,441 INFO L225 Difference]: With dead ends: 345677 [2021-06-12 20:57:43,441 INFO L226 Difference]: Without dead ends: 344598 [2021-06-12 20:57:43,441 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 315.3ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:57:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344598 states. [2021-06-12 20:57:52,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344598 to 187807. [2021-06-12 20:57:52,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187807 states, 187806 states have (on average 4.840143552389168) internal successors, (909008), 187806 states have internal predecessors, (909008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:57:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187807 states to 187807 states and 909008 transitions. [2021-06-12 20:57:54,104 INFO L78 Accepts]: Start accepts. Automaton has 187807 states and 909008 transitions. Word has length 45 [2021-06-12 20:57:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:57:54,104 INFO L482 AbstractCegarLoop]: Abstraction has 187807 states and 909008 transitions. [2021-06-12 20:57:54,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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 20:57:54,104 INFO L276 IsEmpty]: Start isEmpty. Operand 187807 states and 909008 transitions. [2021-06-12 20:57:55,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 20:57:55,196 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:57:55,196 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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, 1] [2021-06-12 20:57:55,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:57:55,413 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:57:55,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:57:55,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2065809986, now seen corresponding path program 44 times [2021-06-12 20:57:55,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:57:55,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500061383] [2021-06-12 20:57:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:57:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:57:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 20:57:55,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:57:55,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500061383] [2021-06-12 20:57:55,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500061383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:55,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549978048] [2021-06-12 20:57:55,456 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:57:55,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:57:55,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:57:55,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:57:55,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:57:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 20:57:55,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549978048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:57:55,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:57:55,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-12 20:57:55,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191955145] [2021-06-12 20:57:55,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:57:55,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:57:55,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:57:55,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:57:55,627 INFO L87 Difference]: Start difference. First operand 187807 states and 909008 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 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 20:58:00,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:58:00,185 INFO L93 Difference]: Finished difference Result 362878 states and 1697181 transitions. [2021-06-12 20:58:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:58:00,185 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 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 45 [2021-06-12 20:58:00,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:58:03,494 INFO L225 Difference]: With dead ends: 362878 [2021-06-12 20:58:03,495 INFO L226 Difference]: Without dead ends: 361792 [2021-06-12 20:58:03,496 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 446.3ms TimeCoverageRelationStatistics Valid=556, Invalid=1796, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:58:04,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361792 states. [2021-06-12 20:58:15,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361792 to 265120. [2021-06-12 20:58:15,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265120 states, 265119 states have (on average 4.861846944202415) internal successors, (1288968), 265119 states have internal predecessors, (1288968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265120 states to 265120 states and 1288968 transitions. [2021-06-12 20:58:18,638 INFO L78 Accepts]: Start accepts. Automaton has 265120 states and 1288968 transitions. Word has length 45 [2021-06-12 20:58:18,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:58:18,638 INFO L482 AbstractCegarLoop]: Abstraction has 265120 states and 1288968 transitions. [2021-06-12 20:58:18,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 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 20:58:18,638 INFO L276 IsEmpty]: Start isEmpty. Operand 265120 states and 1288968 transitions. [2021-06-12 20:58:19,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-12 20:58:19,495 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:58:19,495 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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, 1] [2021-06-12 20:58:19,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-12 20:58:19,697 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:58:19,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:58:19,697 INFO L82 PathProgramCache]: Analyzing trace with hash 2086232522, now seen corresponding path program 45 times [2021-06-12 20:58:19,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:58:19,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19734901] [2021-06-12 20:58:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:58:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:58:19,745 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 20:58:19,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:58:19,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19734901] [2021-06-12 20:58:19,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19734901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:19,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890452865] [2021-06-12 20:58:19,745 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:58:19,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:58:19,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:58:19,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 20:58:19,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:58:20,359 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-12 20:58:20,413 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:58:20,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890452865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:58:20,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:58:20,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-12 20:58:20,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706838361] [2021-06-12 20:58:20,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:58:20,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:58:20,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:58:20,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:58:20,415 INFO L87 Difference]: Start difference. First operand 265120 states and 1288968 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:58:29,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:58:29,639 INFO L93 Difference]: Finished difference Result 557436 states and 2590905 transitions. [2021-06-12 20:58:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-12 20:58:29,640 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-12 20:58:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:58:35,924 INFO L225 Difference]: With dead ends: 557436 [2021-06-12 20:58:35,924 INFO L226 Difference]: Without dead ends: 555086 [2021-06-12 20:58:35,925 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4062 ImplicationChecksByTransitivity, 1539.4ms TimeCoverageRelationStatistics Valid=2286, Invalid=8426, Unknown=0, NotChecked=0, Total=10712 [2021-06-12 20:58:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555086 states. [2021-06-12 20:58:54,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555086 to 417023. [2021-06-12 20:58:56,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417023 states, 417022 states have (on average 4.902988331550853) internal successors, (2044654), 417022 states have internal predecessors, (2044654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-12 20:59:01,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:59:01,145 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 20:59:01,147 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 20:59:01,149 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 20:59:01,149 INFO L202 PluginConnector]: Adding new model counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 08:59:01 BasicIcfg [2021-06-12 20:59:01,149 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 20:59:01,150 INFO L168 Benchmark]: Toolchain (without parser) took 530140.08 ms. Allocated memory was 127.9 MB in the beginning and 8.0 GB in the end (delta: 7.9 GB). Free memory was 107.1 MB in the beginning and 3.5 GB in the end (delta: -3.4 GB). Peak memory consumption was 4.8 GB. Max. memory is 8.0 GB. [2021-06-12 20:59:01,150 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 127.9 MB. Free memory was 108.3 MB in the beginning and 108.2 MB in the end (delta: 131.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:59:01,150 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.10 ms. Allocated memory is still 127.9 MB. Free memory was 107.0 MB in the beginning and 105.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:59:01,150 INFO L168 Benchmark]: Boogie Preprocessor took 23.09 ms. Allocated memory is still 127.9 MB. Free memory was 105.6 MB in the beginning and 104.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:59:01,150 INFO L168 Benchmark]: RCFGBuilder took 293.60 ms. Allocated memory is still 127.9 MB. Free memory was 104.5 MB in the beginning and 89.9 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-06-12 20:59:01,150 INFO L168 Benchmark]: TraceAbstraction took 529789.30 ms. Allocated memory was 127.9 MB in the beginning and 8.0 GB in the end (delta: 7.9 GB). Free memory was 89.5 MB in the beginning and 3.5 GB in the end (delta: -3.4 GB). Peak memory consumption was 4.8 GB. Max. memory is 8.0 GB. [2021-06-12 20:59:01,151 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 127.9 MB. Free memory was 108.3 MB in the beginning and 108.2 MB in the end (delta: 131.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.10 ms. Allocated memory is still 127.9 MB. Free memory was 107.0 MB in the beginning and 105.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.09 ms. Allocated memory is still 127.9 MB. Free memory was 105.6 MB in the beginning and 104.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 293.60 ms. Allocated memory is still 127.9 MB. Free memory was 104.5 MB in the beginning and 89.9 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 529789.30 ms. Allocated memory was 127.9 MB in the beginning and 8.0 GB in the end (delta: 7.9 GB). Free memory was 89.5 MB in the beginning and 3.5 GB in the end (delta: -3.4 GB). Peak memory consumption was 4.8 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (314838 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 56 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 529669.9ms, OverallIterations: 56, TraceHistogramMax: 3, EmptinessCheckTime: 25405.6ms, AutomataDifference: 191165.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 70.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4333 SDtfs, 17954 SDslu, 29406 SDs, 0 SdLazy, 14131 SolverSat, 2113 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7587.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2955 GetRequests, 1681 SyntacticMatches, 5 SemanticMatches, 1269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16580 ImplicationChecksByTransitivity, 14043.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=269480occurred in iteration=44, InterpolantAutomatonStates: 1028, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 289594.5ms AutomataMinimizationTime, 56 MinimizatonAttempts, 3217869 StatesRemovedByMinimization, 55 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 628.1ms SsaConstructionTime, 1146.5ms SatisfiabilityAnalysisTime, 9855.8ms InterpolantComputationTime, 3939 NumberOfCodeBlocks, 3925 NumberOfCodeBlocksAsserted, 169 NumberOfCheckSat, 3836 ConstructedInterpolants, 0 QuantifiedInterpolants, 22373 SizeOfPredicates, 134 NumberOfNonLiveVariables, 4888 ConjunctsInSsa, 593 ConjunctsInUnsatCore, 103 InterpolantComputations, 10 PerfectInterpolantSequences, 559/1346 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown !SESSION 2021-06-12 20:50:09.174 ----------------------------------------------- eclipse.buildId=unknown java.version=11.0.11 java.vendor=Debian BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -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/counter-determinism.wvr.bpl Command-line arguments: -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/counter-determinism.wvr.bpl !ENTRY org.eclipse.osgi 4 0 2021-06-12 20:59:01.434 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fc14fd90/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) An error has occurred. See the log file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4fc14fd90/.metadata/.log.