/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/test/easy1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 22:32:54,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 22:32:54,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 22:32:54,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 22:32:54,857 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 22:32:54,872 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 22:32:54,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 22:32:54,872 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 22:32:54,872 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 22:32:54,873 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 22:32:54,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 22:32:54,873 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 22:32:54,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 22:32:54,873 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 22:32:54,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 22:32:54,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 22:32:54,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 22:32:54,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 22:32:54,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 22:32:54,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 22:32:54,874 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 22:32:54,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 22:32:54,874 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 22:32:54,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 22:32:54,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 22:32:54,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 22:32:54,875 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 22:32:54,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 22:32:54,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 22:32:54,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 22:32:54,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 22:32:54,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 22:32:54,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 22:32:54,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 22:32:54,876 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 22:32:54,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 22:32:54,876 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 22:32:55,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 22:32:55,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 22:32:55,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 22:32:55,087 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 22:32:55,089 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 22:32:55,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy1.wvr.bpl [2021-06-12 22:32:55,090 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy1.wvr.bpl' [2021-06-12 22:32:55,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 22:32:55,121 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 22:32:55,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 22:32:55,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 22:32:55,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 22:32:55,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:32:55" (1/1) ... [2021-06-12 22:32:55,147 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:32:55" (1/1) ... [2021-06-12 22:32:55,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 22:32:55,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 22:32:55,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 22:32:55,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 22:32:55,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:32:55" (1/1) ... [2021-06-12 22:32:55,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:32:55" (1/1) ... [2021-06-12 22:32:55,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:32:55" (1/1) ... [2021-06-12 22:32:55,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:32:55" (1/1) ... [2021-06-12 22:32:55,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:32:55" (1/1) ... [2021-06-12 22:32:55,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:32:55" (1/1) ... [2021-06-12 22:32:55,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:32:55" (1/1) ... [2021-06-12 22:32:55,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 22:32:55,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 22:32:55,167 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 22:32:55,167 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 22:32:55,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:32:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 22:32:55,286 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 22:32:55,286 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 22:32:55,286 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 22:32:55,287 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 22:32:55,287 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 22:32:55,287 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 22:32:55,287 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 22:32:55,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 22:32:55,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 22:32:55,288 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 22:32:55,401 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 22:32:55,401 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 22:32:55,403 INFO L202 PluginConnector]: Adding new model easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:32:55 BoogieIcfgContainer [2021-06-12 22:32:55,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 22:32:55,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 22:32:55,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 22:32:55,407 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 22:32:55,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:32:55" (1/2) ... [2021-06-12 22:32:55,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a72b7d4 and model type easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 10:32:55, skipping insertion in model container [2021-06-12 22:32:55,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:32:55" (2/2) ... [2021-06-12 22:32:55,409 INFO L111 eAbstractionObserver]: Analyzing ICFG easy1.wvr.bpl [2021-06-12 22:32:55,413 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 22:32:55,413 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 22:32:55,413 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 22:32:55,413 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 22:32:55,433 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 22:32:55,446 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 22:32:55,458 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 22:32:55,458 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 22:32:55,458 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 22:32:55,458 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 22:32:55,458 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 22:32:55,458 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 22:32:55,458 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 22:32:55,458 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 22:32:55,464 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-06-12 22:32:55,471 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:55,472 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:55,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 22:32:55,477 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:55,477 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:55,477 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:55,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:55,481 INFO L82 PathProgramCache]: Analyzing trace with hash -64585265, now seen corresponding path program 1 times [2021-06-12 22:32:55,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:55,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101216772] [2021-06-12 22:32:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:55,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:55,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101216772] [2021-06-12 22:32:55,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101216772] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:32:55,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:32:55,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 22:32:55,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722802492] [2021-06-12 22:32:55,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 22:32:55,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:55,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 22:32:55,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 22:32:55,642 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 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) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:55,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:55,684 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2021-06-12 22:32:55,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 22:32:55,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-12 22:32:55,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:55,694 INFO L225 Difference]: With dead ends: 54 [2021-06-12 22:32:55,694 INFO L226 Difference]: Without dead ends: 47 [2021-06-12 22:32:55,695 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 22:32:55,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-06-12 22:32:55,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-06-12 22:32:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:55,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-06-12 22:32:55,747 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2021-06-12 22:32:55,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:55,750 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-06-12 22:32:55,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:55,750 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-06-12 22:32:55,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 22:32:55,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:55,753 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:55,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 22:32:55,753 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:55,758 INFO L82 PathProgramCache]: Analyzing trace with hash 732040657, now seen corresponding path program 1 times [2021-06-12 22:32:55,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:55,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329565944] [2021-06-12 22:32:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:55,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:55,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329565944] [2021-06-12 22:32:55,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329565944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:55,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387805436] [2021-06-12 22:32:55,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:55,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 22:32:55,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:55,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387805436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:55,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:55,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-12 22:32:55,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376682439] [2021-06-12 22:32:55,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 22:32:55,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:55,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 22:32:55,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 22:32:55,913 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:55,961 INFO L93 Difference]: Finished difference Result 61 states and 109 transitions. [2021-06-12 22:32:55,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 22:32:55,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 22:32:55,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:55,963 INFO L225 Difference]: With dead ends: 61 [2021-06-12 22:32:55,963 INFO L226 Difference]: Without dead ends: 61 [2021-06-12 22:32:55,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:32:55,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-12 22:32:55,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2021-06-12 22:32:55,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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 22:32:55,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 73 transitions. [2021-06-12 22:32:55,974 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 73 transitions. Word has length 13 [2021-06-12 22:32:55,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:55,974 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 73 transitions. [2021-06-12 22:32:55,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:55,975 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 73 transitions. [2021-06-12 22:32:55,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 22:32:55,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:55,976 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:56,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-12 22:32:56,192 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:56,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:56,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1434845965, now seen corresponding path program 1 times [2021-06-12 22:32:56,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:56,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559084445] [2021-06-12 22:32:56,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:56,226 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 22:32:56,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:56,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559084445] [2021-06-12 22:32:56,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559084445] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:32:56,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:32:56,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 22:32:56,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001714245] [2021-06-12 22:32:56,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 22:32:56,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:56,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 22:32:56,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 22:32:56,232 INFO L87 Difference]: Start difference. First operand 38 states and 73 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:56,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:56,275 INFO L93 Difference]: Finished difference Result 68 states and 122 transitions. [2021-06-12 22:32:56,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 22:32:56,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 22:32:56,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:56,276 INFO L225 Difference]: With dead ends: 68 [2021-06-12 22:32:56,276 INFO L226 Difference]: Without dead ends: 63 [2021-06-12 22:32:56,276 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:32:56,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-12 22:32:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-06-12 22:32:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:56,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2021-06-12 22:32:56,280 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 13 [2021-06-12 22:32:56,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:56,280 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2021-06-12 22:32:56,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:56,280 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2021-06-12 22:32:56,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 22:32:56,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:56,281 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:56,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 22:32:56,281 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:56,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:56,282 INFO L82 PathProgramCache]: Analyzing trace with hash 169918105, now seen corresponding path program 2 times [2021-06-12 22:32:56,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:56,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341470333] [2021-06-12 22:32:56,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:56,297 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 22:32:56,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:56,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341470333] [2021-06-12 22:32:56,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341470333] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:32:56,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:32:56,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 22:32:56,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740067496] [2021-06-12 22:32:56,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 22:32:56,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:56,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 22:32:56,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 22:32:56,301 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:56,330 INFO L93 Difference]: Finished difference Result 48 states and 91 transitions. [2021-06-12 22:32:56,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 22:32:56,330 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 22:32:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:56,333 INFO L225 Difference]: With dead ends: 48 [2021-06-12 22:32:56,333 INFO L226 Difference]: Without dead ends: 48 [2021-06-12 22:32:56,333 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:32:56,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-06-12 22:32:56,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-06-12 22:32:56,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 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 22:32:56,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-06-12 22:32:56,345 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 13 [2021-06-12 22:32:56,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:56,345 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-06-12 22:32:56,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:56,346 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-06-12 22:32:56,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 22:32:56,346 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:56,346 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:56,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 22:32:56,347 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:56,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:56,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1213979977, now seen corresponding path program 2 times [2021-06-12 22:32:56,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:56,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164193181] [2021-06-12 22:32:56,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:56,368 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 22:32:56,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:56,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164193181] [2021-06-12 22:32:56,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164193181] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:32:56,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:32:56,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 22:32:56,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176997025] [2021-06-12 22:32:56,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 22:32:56,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:56,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 22:32:56,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 22:32:56,370 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:56,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:56,411 INFO L93 Difference]: Finished difference Result 48 states and 89 transitions. [2021-06-12 22:32:56,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 22:32:56,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 22:32:56,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:56,411 INFO L225 Difference]: With dead ends: 48 [2021-06-12 22:32:56,412 INFO L226 Difference]: Without dead ends: 46 [2021-06-12 22:32:56,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:32:56,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-06-12 22:32:56,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2021-06-12 22:32:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-06-12 22:32:56,414 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 13 [2021-06-12 22:32:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:56,414 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-06-12 22:32:56,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:56,414 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-06-12 22:32:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:32:56,415 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:56,415 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:56,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 22:32:56,415 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:56,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:56,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1806788977, now seen corresponding path program 1 times [2021-06-12 22:32:56,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:56,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119939131] [2021-06-12 22:32:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:56,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:56,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119939131] [2021-06-12 22:32:56,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119939131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:56,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128309036] [2021-06-12 22:32:56,496 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 22:32:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:56,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:32:56,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:56,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128309036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:56,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:56,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 7 [2021-06-12 22:32:56,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894228365] [2021-06-12 22:32:56,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:32:56,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:56,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:32:56,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:32:56,584 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:56,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:56,693 INFO L93 Difference]: Finished difference Result 129 states and 238 transitions. [2021-06-12 22:32:56,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:32:56,693 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:32:56,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:56,695 INFO L225 Difference]: With dead ends: 129 [2021-06-12 22:32:56,695 INFO L226 Difference]: Without dead ends: 122 [2021-06-12 22:32:56,699 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:32:56,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-12 22:32:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 64. [2021-06-12 22:32:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 63 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:56,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2021-06-12 22:32:56,707 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 15 [2021-06-12 22:32:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:56,708 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2021-06-12 22:32:56,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:56,708 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2021-06-12 22:32:56,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 22:32:56,708 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:56,708 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:56,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:56,909 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:56,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:56,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1307356559, now seen corresponding path program 2 times [2021-06-12 22:32:56,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:56,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695224015] [2021-06-12 22:32:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:56,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:56,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695224015] [2021-06-12 22:32:56,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695224015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:56,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982525005] [2021-06-12 22:32:56,965 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 22:32:57,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:32:57,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:57,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:32:57,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:32:57,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982525005] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:32:57,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 22:32:57,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-06-12 22:32:57,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180591622] [2021-06-12 22:32:57,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 22:32:57,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:57,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 22:32:57,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:32:57,068 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:57,108 INFO L93 Difference]: Finished difference Result 114 states and 226 transitions. [2021-06-12 22:32:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 22:32:57,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 22:32:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:57,109 INFO L225 Difference]: With dead ends: 114 [2021-06-12 22:32:57,109 INFO L226 Difference]: Without dead ends: 107 [2021-06-12 22:32:57,109 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:32:57,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-12 22:32:57,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2021-06-12 22:32:57,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1481481481481484) internal successors, (174), 81 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:57,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 174 transitions. [2021-06-12 22:32:57,115 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 174 transitions. Word has length 15 [2021-06-12 22:32:57,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:57,115 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 174 transitions. [2021-06-12 22:32:57,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 174 transitions. [2021-06-12 22:32:57,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:32:57,116 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:57,116 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:57,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:57,329 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:57,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:57,329 INFO L82 PathProgramCache]: Analyzing trace with hash -2080643123, now seen corresponding path program 3 times [2021-06-12 22:32:57,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:57,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209583219] [2021-06-12 22:32:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:57,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:57,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209583219] [2021-06-12 22:32:57,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209583219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:57,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309457190] [2021-06-12 22:32:57,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:57,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:32:57,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:57,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:32:57,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:57,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309457190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:57,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:57,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:32:57,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578904415] [2021-06-12 22:32:57,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:32:57,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:57,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:32:57,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:32:57,466 INFO L87 Difference]: Start difference. First operand 82 states and 174 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:57,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:57,527 INFO L93 Difference]: Finished difference Result 146 states and 283 transitions. [2021-06-12 22:32:57,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:32:57,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:32:57,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:57,528 INFO L225 Difference]: With dead ends: 146 [2021-06-12 22:32:57,528 INFO L226 Difference]: Without dead ends: 135 [2021-06-12 22:32:57,528 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:32:57,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-12 22:32:57,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 102. [2021-06-12 22:32:57,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1485148514851486) internal successors, (217), 101 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 217 transitions. [2021-06-12 22:32:57,533 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 217 transitions. Word has length 17 [2021-06-12 22:32:57,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:57,533 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 217 transitions. [2021-06-12 22:32:57,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:57,533 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 217 transitions. [2021-06-12 22:32:57,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:32:57,534 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:57,534 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:57,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:57,749 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:57,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:57,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1376961195, now seen corresponding path program 4 times [2021-06-12 22:32:57,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:57,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728721893] [2021-06-12 22:32:57,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:57,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:57,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728721893] [2021-06-12 22:32:57,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728721893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:57,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534782990] [2021-06-12 22:32:57,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:57,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:32:57,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:57,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:32:57,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:57,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534782990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:57,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:57,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 22:32:57,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239263600] [2021-06-12 22:32:57,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:32:57,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:57,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:32:57,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:32:57,846 INFO L87 Difference]: Start difference. First operand 102 states and 217 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:57,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:57,890 INFO L93 Difference]: Finished difference Result 137 states and 266 transitions. [2021-06-12 22:32:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 22:32:57,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:32:57,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:57,891 INFO L225 Difference]: With dead ends: 137 [2021-06-12 22:32:57,892 INFO L226 Difference]: Without dead ends: 137 [2021-06-12 22:32:57,892 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:32:57,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-12 22:32:57,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 100. [2021-06-12 22:32:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.1313131313131315) internal successors, (211), 99 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:57,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 211 transitions. [2021-06-12 22:32:57,895 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 211 transitions. Word has length 17 [2021-06-12 22:32:57,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:57,895 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 211 transitions. [2021-06-12 22:32:57,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:57,895 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 211 transitions. [2021-06-12 22:32:57,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:32:57,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:57,896 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:58,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:58,113 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:58,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:58,113 INFO L82 PathProgramCache]: Analyzing trace with hash 397922747, now seen corresponding path program 5 times [2021-06-12 22:32:58,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:58,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267765585] [2021-06-12 22:32:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:58,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:58,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267765585] [2021-06-12 22:32:58,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267765585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:58,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804980718] [2021-06-12 22:32:58,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:58,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:32:58,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:58,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:32:58,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:58,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804980718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:58,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:58,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 22:32:58,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556862971] [2021-06-12 22:32:58,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:32:58,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:58,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:32:58,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:32:58,219 INFO L87 Difference]: Start difference. First operand 100 states and 211 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:58,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:58,266 INFO L93 Difference]: Finished difference Result 126 states and 250 transitions. [2021-06-12 22:32:58,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 22:32:58,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:32:58,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:58,267 INFO L225 Difference]: With dead ends: 126 [2021-06-12 22:32:58,267 INFO L226 Difference]: Without dead ends: 124 [2021-06-12 22:32:58,268 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:32:58,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-06-12 22:32:58,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2021-06-12 22:32:58,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.111111111111111) internal successors, (209), 99 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:58,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 209 transitions. [2021-06-12 22:32:58,271 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 209 transitions. Word has length 17 [2021-06-12 22:32:58,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:58,271 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 209 transitions. [2021-06-12 22:32:58,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:58,271 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 209 transitions. [2021-06-12 22:32:58,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:32:58,272 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:58,272 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:58,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:58,486 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:58,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:58,486 INFO L82 PathProgramCache]: Analyzing trace with hash 613173649, now seen corresponding path program 6 times [2021-06-12 22:32:58,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:58,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122698292] [2021-06-12 22:32:58,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:32:58,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:58,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122698292] [2021-06-12 22:32:58,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122698292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:58,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107728919] [2021-06-12 22:32:58,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:58,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:32:58,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:58,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:32:58,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:32:58,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107728919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:58,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:58,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 22:32:58,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916759503] [2021-06-12 22:32:58,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:32:58,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:58,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:32:58,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:32:58,571 INFO L87 Difference]: Start difference. First operand 100 states and 209 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:58,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:58,636 INFO L93 Difference]: Finished difference Result 174 states and 339 transitions. [2021-06-12 22:32:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 22:32:58,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:32:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:58,638 INFO L225 Difference]: With dead ends: 174 [2021-06-12 22:32:58,638 INFO L226 Difference]: Without dead ends: 174 [2021-06-12 22:32:58,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:32:58,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-12 22:32:58,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 109. [2021-06-12 22:32:58,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.1666666666666665) internal successors, (234), 108 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:58,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 234 transitions. [2021-06-12 22:32:58,642 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 234 transitions. Word has length 17 [2021-06-12 22:32:58,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:58,642 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 234 transitions. [2021-06-12 22:32:58,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 234 transitions. [2021-06-12 22:32:58,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:32:58,642 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:58,642 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:58,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:58,843 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:58,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:58,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1315978957, now seen corresponding path program 7 times [2021-06-12 22:32:58,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:58,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983884019] [2021-06-12 22:32:58,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:32:58,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:58,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983884019] [2021-06-12 22:32:58,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983884019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:58,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135061774] [2021-06-12 22:32:58,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:58,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:32:58,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:32:58,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135061774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:58,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:58,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 22:32:58,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707972873] [2021-06-12 22:32:58,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:32:58,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:58,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:32:58,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:32:58,955 INFO L87 Difference]: Start difference. First operand 109 states and 234 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:58,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:58,997 INFO L93 Difference]: Finished difference Result 155 states and 313 transitions. [2021-06-12 22:32:58,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 22:32:58,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:32:58,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:58,998 INFO L225 Difference]: With dead ends: 155 [2021-06-12 22:32:58,998 INFO L226 Difference]: Without dead ends: 152 [2021-06-12 22:32:58,998 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:32:58,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-12 22:32:59,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 115. [2021-06-12 22:32:59,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.2280701754385963) internal successors, (254), 114 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 254 transitions. [2021-06-12 22:32:59,001 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 254 transitions. Word has length 17 [2021-06-12 22:32:59,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:59,001 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 254 transitions. [2021-06-12 22:32:59,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:59,002 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 254 transitions. [2021-06-12 22:32:59,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:32:59,002 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:59,002 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:59,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-12 22:32:59,213 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:59,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:59,213 INFO L82 PathProgramCache]: Analyzing trace with hash 51051097, now seen corresponding path program 8 times [2021-06-12 22:32:59,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:59,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287527908] [2021-06-12 22:32:59,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:32:59,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:59,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287527908] [2021-06-12 22:32:59,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287527908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:59,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338971426] [2021-06-12 22:32:59,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:59,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:32:59,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:59,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:32:59,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:32:59,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338971426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:59,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:59,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 22:32:59,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521505081] [2021-06-12 22:32:59,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:32:59,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:59,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:32:59,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:32:59,287 INFO L87 Difference]: Start difference. First operand 115 states and 254 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:59,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:59,326 INFO L93 Difference]: Finished difference Result 160 states and 326 transitions. [2021-06-12 22:32:59,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 22:32:59,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:32:59,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:59,327 INFO L225 Difference]: With dead ends: 160 [2021-06-12 22:32:59,327 INFO L226 Difference]: Without dead ends: 160 [2021-06-12 22:32:59,327 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:32:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-12 22:32:59,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 117. [2021-06-12 22:32:59,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.2241379310344827) internal successors, (258), 116 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:59,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 258 transitions. [2021-06-12 22:32:59,330 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 258 transitions. Word has length 17 [2021-06-12 22:32:59,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:59,330 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 258 transitions. [2021-06-12 22:32:59,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:59,330 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 258 transitions. [2021-06-12 22:32:59,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:32:59,331 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:59,331 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:59,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:59,538 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:59,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:59,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1332846985, now seen corresponding path program 9 times [2021-06-12 22:32:59,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:59,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742784146] [2021-06-12 22:32:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:32:59,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:59,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742784146] [2021-06-12 22:32:59,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742784146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:59,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648339594] [2021-06-12 22:32:59,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:59,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:32:59,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:59,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:32:59,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:32:59,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648339594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:59,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:59,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 22:32:59,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563114448] [2021-06-12 22:32:59,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:32:59,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:59,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:32:59,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:32:59,609 INFO L87 Difference]: Start difference. First operand 117 states and 258 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:32:59,648 INFO L93 Difference]: Finished difference Result 170 states and 342 transitions. [2021-06-12 22:32:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 22:32:59,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:32:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:32:59,650 INFO L225 Difference]: With dead ends: 170 [2021-06-12 22:32:59,650 INFO L226 Difference]: Without dead ends: 168 [2021-06-12 22:32:59,651 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:32:59,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-06-12 22:32:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 119. [2021-06-12 22:32:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2033898305084745) internal successors, (260), 118 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 260 transitions. [2021-06-12 22:32:59,658 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 260 transitions. Word has length 17 [2021-06-12 22:32:59,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:32:59,658 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 260 transitions. [2021-06-12 22:32:59,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:32:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 260 transitions. [2021-06-12 22:32:59,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:32:59,659 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:32:59,659 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:32:59,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:59,860 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:32:59,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:32:59,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1145142685, now seen corresponding path program 10 times [2021-06-12 22:32:59,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:32:59,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605368363] [2021-06-12 22:32:59,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:32:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:32:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:59,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:32:59,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605368363] [2021-06-12 22:32:59,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605368363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:59,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299971787] [2021-06-12 22:32:59,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:32:59,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:32:59,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:32:59,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:32:59,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:32:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:32:59,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299971787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:32:59,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:32:59,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:32:59,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268411299] [2021-06-12 22:32:59,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:32:59,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:32:59,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:32:59,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:32:59,963 INFO L87 Difference]: Start difference. First operand 119 states and 260 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:00,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:00,014 INFO L93 Difference]: Finished difference Result 152 states and 307 transitions. [2021-06-12 22:33:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:33:00,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:33:00,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:00,016 INFO L225 Difference]: With dead ends: 152 [2021-06-12 22:33:00,016 INFO L226 Difference]: Without dead ends: 152 [2021-06-12 22:33:00,019 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:33:00,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-12 22:33:00,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2021-06-12 22:33:00,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1739130434782608) internal successors, (250), 115 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:00,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 250 transitions. [2021-06-12 22:33:00,025 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 250 transitions. Word has length 17 [2021-06-12 22:33:00,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:00,025 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 250 transitions. [2021-06-12 22:33:00,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:00,025 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 250 transitions. [2021-06-12 22:33:00,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 22:33:00,026 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:00,026 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:00,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 22:33:00,233 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:00,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:00,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1839193251, now seen corresponding path program 11 times [2021-06-12 22:33:00,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:00,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321520915] [2021-06-12 22:33:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:00,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:00,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321520915] [2021-06-12 22:33:00,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321520915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:00,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015064047] [2021-06-12 22:33:00,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:00,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:33:00,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:00,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:33:00,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:00,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015064047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:00,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:00,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:33:00,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036155442] [2021-06-12 22:33:00,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:33:00,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:00,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:33:00,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:33:00,454 INFO L87 Difference]: Start difference. First operand 116 states and 250 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:00,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:00,501 INFO L93 Difference]: Finished difference Result 167 states and 329 transitions. [2021-06-12 22:33:00,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:33:00,501 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 22:33:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:00,502 INFO L225 Difference]: With dead ends: 167 [2021-06-12 22:33:00,502 INFO L226 Difference]: Without dead ends: 161 [2021-06-12 22:33:00,502 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:33:00,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-12 22:33:00,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 120. [2021-06-12 22:33:00,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1512605042016806) internal successors, (256), 119 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 256 transitions. [2021-06-12 22:33:00,505 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 256 transitions. Word has length 17 [2021-06-12 22:33:00,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:00,505 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 256 transitions. [2021-06-12 22:33:00,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:00,505 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 256 transitions. [2021-06-12 22:33:00,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:33:00,505 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:00,505 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:00,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 22:33:00,721 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:00,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:00,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1030416975, now seen corresponding path program 12 times [2021-06-12 22:33:00,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:00,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617525122] [2021-06-12 22:33:00,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:00,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:00,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617525122] [2021-06-12 22:33:00,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617525122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:00,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780957329] [2021-06-12 22:33:00,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:33:00,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:33:00,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:00,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:33:00,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:00,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780957329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:00,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:00,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-06-12 22:33:00,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11383036] [2021-06-12 22:33:00,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:33:00,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:00,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:33:00,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:33:00,894 INFO L87 Difference]: Start difference. First operand 120 states and 256 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 22:33:01,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:01,037 INFO L93 Difference]: Finished difference Result 303 states and 601 transitions. [2021-06-12 22:33:01,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:33:01,038 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 19 [2021-06-12 22:33:01,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:01,039 INFO L225 Difference]: With dead ends: 303 [2021-06-12 22:33:01,039 INFO L226 Difference]: Without dead ends: 296 [2021-06-12 22:33:01,039 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:33:01,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-12 22:33:01,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 151. [2021-06-12 22:33:01,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2533333333333334) internal successors, (338), 150 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:01,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 338 transitions. [2021-06-12 22:33:01,042 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 338 transitions. Word has length 19 [2021-06-12 22:33:01,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:01,043 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 338 transitions. [2021-06-12 22:33:01,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 22:33:01,043 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 338 transitions. [2021-06-12 22:33:01,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:33:01,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:01,043 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:01,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 22:33:01,257 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:01,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:01,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1048750001, now seen corresponding path program 13 times [2021-06-12 22:33:01,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:01,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55935695] [2021-06-12 22:33:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:01,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:01,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55935695] [2021-06-12 22:33:01,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55935695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:01,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544395823] [2021-06-12 22:33:01,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:01,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:33:01,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:33:01,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544395823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:01,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:01,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-06-12 22:33:01,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938905165] [2021-06-12 22:33:01,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:33:01,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:01,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:33:01,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:33:01,389 INFO L87 Difference]: Start difference. First operand 151 states and 338 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:01,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:01,518 INFO L93 Difference]: Finished difference Result 285 states and 591 transitions. [2021-06-12 22:33:01,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:33:01,518 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:33:01,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:01,519 INFO L225 Difference]: With dead ends: 285 [2021-06-12 22:33:01,519 INFO L226 Difference]: Without dead ends: 275 [2021-06-12 22:33:01,519 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:33:01,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-12 22:33:01,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 186. [2021-06-12 22:33:01,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.264864864864865) internal successors, (419), 185 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 419 transitions. [2021-06-12 22:33:01,523 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 419 transitions. Word has length 19 [2021-06-12 22:33:01,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:01,524 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 419 transitions. [2021-06-12 22:33:01,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:01,524 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 419 transitions. [2021-06-12 22:33:01,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:33:01,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:01,524 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:01,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:01,741 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:01,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:01,741 INFO L82 PathProgramCache]: Analyzing trace with hash -588981681, now seen corresponding path program 14 times [2021-06-12 22:33:01,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:01,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727840275] [2021-06-12 22:33:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:01,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:01,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727840275] [2021-06-12 22:33:01,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727840275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:01,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176568184] [2021-06-12 22:33:01,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:01,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:33:01,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:01,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 22:33:01,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:33:01,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176568184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:01,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:01,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-06-12 22:33:01,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397987621] [2021-06-12 22:33:01,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:33:01,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:01,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:33:01,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:33:01,878 INFO L87 Difference]: Start difference. First operand 186 states and 419 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:02,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:02,021 INFO L93 Difference]: Finished difference Result 359 states and 743 transitions. [2021-06-12 22:33:02,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:33:02,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 22:33:02,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:02,022 INFO L225 Difference]: With dead ends: 359 [2021-06-12 22:33:02,022 INFO L226 Difference]: Without dead ends: 352 [2021-06-12 22:33:02,023 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:33:02,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-12 22:33:02,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 212. [2021-06-12 22:33:02,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.3175355450236967) internal successors, (489), 211 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:02,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 489 transitions. [2021-06-12 22:33:02,027 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 489 transitions. Word has length 19 [2021-06-12 22:33:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:02,027 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 489 transitions. [2021-06-12 22:33:02,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 489 transitions. [2021-06-12 22:33:02,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:33:02,028 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:02,028 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:02,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:02,243 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:02,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:02,243 INFO L82 PathProgramCache]: Analyzing trace with hash -617233839, now seen corresponding path program 15 times [2021-06-12 22:33:02,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:02,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329364859] [2021-06-12 22:33:02,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:02,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:02,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:02,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329364859] [2021-06-12 22:33:02,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329364859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:02,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455615418] [2021-06-12 22:33:02,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:02,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:33:02,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:02,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:33:02,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 22:33:02,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455615418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:02,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:02,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-12 22:33:02,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023671781] [2021-06-12 22:33:02,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:33:02,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:02,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:33:02,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:33:02,392 INFO L87 Difference]: Start difference. First operand 212 states and 489 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:02,645 INFO L93 Difference]: Finished difference Result 389 states and 854 transitions. [2021-06-12 22:33:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:33:02,645 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:33:02,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:02,646 INFO L225 Difference]: With dead ends: 389 [2021-06-12 22:33:02,646 INFO L226 Difference]: Without dead ends: 317 [2021-06-12 22:33:02,646 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=232, Invalid=580, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:33:02,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-12 22:33:02,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 221. [2021-06-12 22:33:02,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.3181818181818183) internal successors, (510), 220 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:02,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 510 transitions. [2021-06-12 22:33:02,651 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 510 transitions. Word has length 21 [2021-06-12 22:33:02,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:02,651 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 510 transitions. [2021-06-12 22:33:02,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:02,651 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 510 transitions. [2021-06-12 22:33:02,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:33:02,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:02,652 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:02,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:02,865 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:02,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:02,865 INFO L82 PathProgramCache]: Analyzing trace with hash -380162493, now seen corresponding path program 16 times [2021-06-12 22:33:02,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:02,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613147998] [2021-06-12 22:33:02,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:02,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:02,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613147998] [2021-06-12 22:33:02,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613147998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:02,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288953429] [2021-06-12 22:33:02,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:02,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:33:02,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:02,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:33:02,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:02,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288953429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:02,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:02,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:33:02,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114518108] [2021-06-12 22:33:02,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:33:02,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:02,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:33:02,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:33:02,965 INFO L87 Difference]: Start difference. First operand 221 states and 510 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:03,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:03,015 INFO L93 Difference]: Finished difference Result 361 states and 777 transitions. [2021-06-12 22:33:03,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:33:03,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:33:03,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:03,017 INFO L225 Difference]: With dead ends: 361 [2021-06-12 22:33:03,017 INFO L226 Difference]: Without dead ends: 361 [2021-06-12 22:33:03,017 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:33:03,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-12 22:33:03,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 258. [2021-06-12 22:33:03,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.3463035019455254) internal successors, (603), 257 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:03,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 603 transitions. [2021-06-12 22:33:03,023 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 603 transitions. Word has length 21 [2021-06-12 22:33:03,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:03,023 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 603 transitions. [2021-06-12 22:33:03,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 603 transitions. [2021-06-12 22:33:03,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:33:03,024 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:03,025 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:03,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 22:33:03,241 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:03,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:03,241 INFO L82 PathProgramCache]: Analyzing trace with hash 492603451, now seen corresponding path program 17 times [2021-06-12 22:33:03,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:03,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419717267] [2021-06-12 22:33:03,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:33:03,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:03,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419717267] [2021-06-12 22:33:03,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419717267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:03,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021390583] [2021-06-12 22:33:03,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:03,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:33:03,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:03,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:33:03,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:33:03,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021390583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:03,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:03,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:33:03,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504667005] [2021-06-12 22:33:03,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:33:03,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:03,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:33:03,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:33:03,329 INFO L87 Difference]: Start difference. First operand 258 states and 603 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:03,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:03,385 INFO L93 Difference]: Finished difference Result 377 states and 812 transitions. [2021-06-12 22:33:03,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:33:03,391 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:33:03,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:03,392 INFO L225 Difference]: With dead ends: 377 [2021-06-12 22:33:03,392 INFO L226 Difference]: Without dead ends: 377 [2021-06-12 22:33:03,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:33:03,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-12 22:33:03,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 280. [2021-06-12 22:33:03,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.3405017921146953) internal successors, (653), 279 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:03,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 653 transitions. [2021-06-12 22:33:03,398 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 653 transitions. Word has length 21 [2021-06-12 22:33:03,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:03,398 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 653 transitions. [2021-06-12 22:33:03,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:03,398 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 653 transitions. [2021-06-12 22:33:03,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:33:03,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:03,399 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:03,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 22:33:03,615 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:03,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:03,615 INFO L82 PathProgramCache]: Analyzing trace with hash -2103486153, now seen corresponding path program 18 times [2021-06-12 22:33:03,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:03,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557017430] [2021-06-12 22:33:03,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:33:03,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:03,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557017430] [2021-06-12 22:33:03,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557017430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:03,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173431271] [2021-06-12 22:33:03,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:03,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:33:03,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:03,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:33:03,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:33:03,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173431271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:03,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:03,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:33:03,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802203204] [2021-06-12 22:33:03,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:33:03,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:03,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:33:03,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:33:03,685 INFO L87 Difference]: Start difference. First operand 280 states and 653 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:03,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:03,736 INFO L93 Difference]: Finished difference Result 352 states and 762 transitions. [2021-06-12 22:33:03,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:33:03,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:33:03,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:03,737 INFO L225 Difference]: With dead ends: 352 [2021-06-12 22:33:03,737 INFO L226 Difference]: Without dead ends: 348 [2021-06-12 22:33:03,738 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:33:03,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-12 22:33:03,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 244. [2021-06-12 22:33:03,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.325102880658436) internal successors, (565), 243 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 565 transitions. [2021-06-12 22:33:03,742 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 565 transitions. Word has length 21 [2021-06-12 22:33:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:03,742 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 565 transitions. [2021-06-12 22:33:03,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 565 transitions. [2021-06-12 22:33:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:33:03,743 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:03,743 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:03,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 22:33:03,959 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:03,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:03,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1685134877, now seen corresponding path program 19 times [2021-06-12 22:33:03,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:03,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778557341] [2021-06-12 22:33:03,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:03,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:03,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778557341] [2021-06-12 22:33:03,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778557341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:03,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284214259] [2021-06-12 22:33:03,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:04,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:33:04,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:04,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284214259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:04,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:04,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 22:33:04,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803386524] [2021-06-12 22:33:04,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 22:33:04,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:04,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 22:33:04,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:33:04,031 INFO L87 Difference]: Start difference. First operand 244 states and 565 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:04,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:04,092 INFO L93 Difference]: Finished difference Result 304 states and 656 transitions. [2021-06-12 22:33:04,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:33:04,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:33:04,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:04,093 INFO L225 Difference]: With dead ends: 304 [2021-06-12 22:33:04,093 INFO L226 Difference]: Without dead ends: 298 [2021-06-12 22:33:04,094 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:33:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-12 22:33:04,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 246. [2021-06-12 22:33:04,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.3102040816326532) internal successors, (566), 245 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 566 transitions. [2021-06-12 22:33:04,098 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 566 transitions. Word has length 21 [2021-06-12 22:33:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:04,098 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 566 transitions. [2021-06-12 22:33:04,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:04,098 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 566 transitions. [2021-06-12 22:33:04,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:33:04,098 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:04,098 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:04,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 22:33:04,313 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:04,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:04,313 INFO L82 PathProgramCache]: Analyzing trace with hash 540638335, now seen corresponding path program 20 times [2021-06-12 22:33:04,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:04,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720204899] [2021-06-12 22:33:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:33:04,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:04,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720204899] [2021-06-12 22:33:04,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720204899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:04,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802854131] [2021-06-12 22:33:04,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:04,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:33:04,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:04,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:33:04,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:33:04,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802854131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:04,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:04,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 22:33:04,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069539657] [2021-06-12 22:33:04,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 22:33:04,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:04,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 22:33:04,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:33:04,391 INFO L87 Difference]: Start difference. First operand 246 states and 566 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:04,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:04,464 INFO L93 Difference]: Finished difference Result 309 states and 671 transitions. [2021-06-12 22:33:04,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:33:04,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:33:04,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:04,465 INFO L225 Difference]: With dead ends: 309 [2021-06-12 22:33:04,465 INFO L226 Difference]: Without dead ends: 309 [2021-06-12 22:33:04,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:33:04,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-12 22:33:04,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 248. [2021-06-12 22:33:04,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.3076923076923075) internal successors, (570), 247 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:04,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 570 transitions. [2021-06-12 22:33:04,469 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 570 transitions. Word has length 21 [2021-06-12 22:33:04,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:04,469 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 570 transitions. [2021-06-12 22:33:04,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:04,469 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 570 transitions. [2021-06-12 22:33:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:33:04,470 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:04,470 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:04,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 22:33:04,685 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:04,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:04,685 INFO L82 PathProgramCache]: Analyzing trace with hash -51672517, now seen corresponding path program 21 times [2021-06-12 22:33:04,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:04,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435824670] [2021-06-12 22:33:04,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:33:04,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:04,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435824670] [2021-06-12 22:33:04,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435824670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:04,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969246107] [2021-06-12 22:33:04,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:04,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:33:04,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:04,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:33:04,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 22:33:04,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969246107] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:33:04,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 22:33:04,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-06-12 22:33:04,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811379835] [2021-06-12 22:33:04,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:33:04,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:04,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:33:04,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:33:04,802 INFO L87 Difference]: Start difference. First operand 248 states and 570 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:04,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:04,873 INFO L93 Difference]: Finished difference Result 382 states and 824 transitions. [2021-06-12 22:33:04,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:33:04,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:33:04,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:04,874 INFO L225 Difference]: With dead ends: 382 [2021-06-12 22:33:04,875 INFO L226 Difference]: Without dead ends: 232 [2021-06-12 22:33:04,875 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:33:04,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-12 22:33:04,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 175. [2021-06-12 22:33:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.7758620689655173) internal successors, (309), 174 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:04,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 309 transitions. [2021-06-12 22:33:04,878 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 309 transitions. Word has length 21 [2021-06-12 22:33:04,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:04,878 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 309 transitions. [2021-06-12 22:33:04,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:04,878 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 309 transitions. [2021-06-12 22:33:04,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:33:04,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:04,878 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:05,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:05,093 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:05,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:05,093 INFO L82 PathProgramCache]: Analyzing trace with hash -2113872589, now seen corresponding path program 22 times [2021-06-12 22:33:05,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:05,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498338681] [2021-06-12 22:33:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:33:05,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:05,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498338681] [2021-06-12 22:33:05,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498338681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:05,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996666125] [2021-06-12 22:33:05,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:05,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:33:05,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:05,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:33:05,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:33:05,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996666125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:05,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:05,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 22:33:05,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621370329] [2021-06-12 22:33:05,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 22:33:05,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:05,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 22:33:05,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:33:05,169 INFO L87 Difference]: Start difference. First operand 175 states and 309 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:05,234 INFO L93 Difference]: Finished difference Result 268 states and 454 transitions. [2021-06-12 22:33:05,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:33:05,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:33:05,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:05,235 INFO L225 Difference]: With dead ends: 268 [2021-06-12 22:33:05,235 INFO L226 Difference]: Without dead ends: 262 [2021-06-12 22:33:05,236 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:33:05,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-12 22:33:05,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 176. [2021-06-12 22:33:05,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.782857142857143) internal successors, (312), 175 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 312 transitions. [2021-06-12 22:33:05,238 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 312 transitions. Word has length 21 [2021-06-12 22:33:05,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:05,239 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 312 transitions. [2021-06-12 22:33:05,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:05,239 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 312 transitions. [2021-06-12 22:33:05,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:33:05,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:05,239 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:05,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 22:33:05,453 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:05,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:05,453 INFO L82 PathProgramCache]: Analyzing trace with hash 913637529, now seen corresponding path program 23 times [2021-06-12 22:33:05,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:05,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250643245] [2021-06-12 22:33:05,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:05,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:05,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250643245] [2021-06-12 22:33:05,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250643245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:05,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050014355] [2021-06-12 22:33:05,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:05,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:33:05,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:05,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:33:05,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:05,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050014355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:05,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:05,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 22:33:05,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988463247] [2021-06-12 22:33:05,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:33:05,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:05,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:33:05,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:33:05,523 INFO L87 Difference]: Start difference. First operand 176 states and 312 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:05,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:05,586 INFO L93 Difference]: Finished difference Result 257 states and 435 transitions. [2021-06-12 22:33:05,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:33:05,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:33:05,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:05,587 INFO L225 Difference]: With dead ends: 257 [2021-06-12 22:33:05,587 INFO L226 Difference]: Without dead ends: 247 [2021-06-12 22:33:05,588 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:33:05,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-12 22:33:05,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 179. [2021-06-12 22:33:05,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.7640449438202248) internal successors, (314), 178 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:05,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 314 transitions. [2021-06-12 22:33:05,591 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 314 transitions. Word has length 21 [2021-06-12 22:33:05,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:05,591 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 314 transitions. [2021-06-12 22:33:05,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:05,591 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 314 transitions. [2021-06-12 22:33:05,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:33:05,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:05,591 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:05,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:05,805 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:05,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:05,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1408084783, now seen corresponding path program 24 times [2021-06-12 22:33:05,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:05,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611721740] [2021-06-12 22:33:05,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:05,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:05,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611721740] [2021-06-12 22:33:05,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611721740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:05,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408227706] [2021-06-12 22:33:05,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:33:05,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:33:05,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:05,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:33:05,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:05,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408227706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:05,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:05,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 22:33:05,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5055208] [2021-06-12 22:33:05,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 22:33:05,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:05,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 22:33:05,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:33:05,872 INFO L87 Difference]: Start difference. First operand 179 states and 314 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:05,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:05,932 INFO L93 Difference]: Finished difference Result 248 states and 411 transitions. [2021-06-12 22:33:05,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:33:05,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:33:05,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:05,933 INFO L225 Difference]: With dead ends: 248 [2021-06-12 22:33:05,933 INFO L226 Difference]: Without dead ends: 239 [2021-06-12 22:33:05,933 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:33:05,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-12 22:33:05,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 191. [2021-06-12 22:33:05,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.7526315789473683) internal successors, (333), 190 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:05,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 333 transitions. [2021-06-12 22:33:05,936 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 333 transitions. Word has length 21 [2021-06-12 22:33:05,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:05,936 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 333 transitions. [2021-06-12 22:33:05,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:05,936 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 333 transitions. [2021-06-12 22:33:05,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:33:05,936 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:05,936 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:06,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 22:33:06,153 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:06,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:06,153 INFO L82 PathProgramCache]: Analyzing trace with hash 791144921, now seen corresponding path program 25 times [2021-06-12 22:33:06,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:06,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034048472] [2021-06-12 22:33:06,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:06,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:06,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034048472] [2021-06-12 22:33:06,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034048472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:06,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639952158] [2021-06-12 22:33:06,173 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:33:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:06,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:33:06,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:06,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639952158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:06,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:06,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:33:06,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144114946] [2021-06-12 22:33:06,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:33:06,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:06,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:33:06,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:33:06,225 INFO L87 Difference]: Start difference. First operand 191 states and 333 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:06,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:06,271 INFO L93 Difference]: Finished difference Result 270 states and 458 transitions. [2021-06-12 22:33:06,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:33:06,271 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:33:06,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:06,272 INFO L225 Difference]: With dead ends: 270 [2021-06-12 22:33:06,272 INFO L226 Difference]: Without dead ends: 270 [2021-06-12 22:33:06,273 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:33:06,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-12 22:33:06,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 200. [2021-06-12 22:33:06,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.7688442211055277) internal successors, (352), 199 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:06,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 352 transitions. [2021-06-12 22:33:06,276 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 352 transitions. Word has length 21 [2021-06-12 22:33:06,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:06,276 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 352 transitions. [2021-06-12 22:33:06,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:06,276 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 352 transitions. [2021-06-12 22:33:06,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:33:06,277 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:06,277 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:06,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:06,493 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:06,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:06,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1493950229, now seen corresponding path program 26 times [2021-06-12 22:33:06,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:06,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122943185] [2021-06-12 22:33:06,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:06,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:06,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:06,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122943185] [2021-06-12 22:33:06,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122943185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:06,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876457271] [2021-06-12 22:33:06,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:33:06,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:33:06,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:06,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:33:06,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:06,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876457271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:06,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:06,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:33:06,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714377724] [2021-06-12 22:33:06,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:33:06,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:06,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:33:06,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:33:06,585 INFO L87 Difference]: Start difference. First operand 200 states and 352 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:06,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:06,634 INFO L93 Difference]: Finished difference Result 240 states and 405 transitions. [2021-06-12 22:33:06,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:33:06,634 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:33:06,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:06,635 INFO L225 Difference]: With dead ends: 240 [2021-06-12 22:33:06,635 INFO L226 Difference]: Without dead ends: 237 [2021-06-12 22:33:06,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:33:06,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-12 22:33:06,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 197. [2021-06-12 22:33:06,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.760204081632653) internal successors, (345), 196 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:06,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 345 transitions. [2021-06-12 22:33:06,637 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 345 transitions. Word has length 21 [2021-06-12 22:33:06,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:06,638 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 345 transitions. [2021-06-12 22:33:06,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:06,638 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 345 transitions. [2021-06-12 22:33:06,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:33:06,638 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:06,638 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:06,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 22:33:06,849 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:06,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:06,849 INFO L82 PathProgramCache]: Analyzing trace with hash 229022369, now seen corresponding path program 27 times [2021-06-12 22:33:06,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:06,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716908572] [2021-06-12 22:33:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:33:06,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:06,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716908572] [2021-06-12 22:33:06,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716908572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:06,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370681123] [2021-06-12 22:33:06,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:06,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:33:06,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:06,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:33:06,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 22:33:06,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370681123] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:33:06,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 22:33:06,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2021-06-12 22:33:06,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837566345] [2021-06-12 22:33:06,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:33:06,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:06,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:33:06,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:33:06,953 INFO L87 Difference]: Start difference. First operand 197 states and 345 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:06,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:06,982 INFO L93 Difference]: Finished difference Result 224 states and 389 transitions. [2021-06-12 22:33:06,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:33:06,990 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:33:06,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:06,993 INFO L225 Difference]: With dead ends: 224 [2021-06-12 22:33:06,993 INFO L226 Difference]: Without dead ends: 199 [2021-06-12 22:33:06,994 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:33:06,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-12 22:33:06,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2021-06-12 22:33:06,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.7091836734693877) internal successors, (335), 196 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 335 transitions. [2021-06-12 22:33:06,996 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 335 transitions. Word has length 21 [2021-06-12 22:33:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:06,997 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 335 transitions. [2021-06-12 22:33:06,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:06,997 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 335 transitions. [2021-06-12 22:33:06,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:33:06,997 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:06,997 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:07,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:07,213 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:07,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:07,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1365207641, now seen corresponding path program 28 times [2021-06-12 22:33:07,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:07,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276084807] [2021-06-12 22:33:07,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:33:07,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:07,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276084807] [2021-06-12 22:33:07,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276084807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:07,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039739276] [2021-06-12 22:33:07,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:07,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:33:07,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:07,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:33:07,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:33:07,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039739276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:07,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:07,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:33:07,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113739835] [2021-06-12 22:33:07,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:33:07,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:07,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:33:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:33:07,292 INFO L87 Difference]: Start difference. First operand 197 states and 335 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:07,334 INFO L93 Difference]: Finished difference Result 234 states and 383 transitions. [2021-06-12 22:33:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:33:07,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:33:07,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:07,335 INFO L225 Difference]: With dead ends: 234 [2021-06-12 22:33:07,335 INFO L226 Difference]: Without dead ends: 234 [2021-06-12 22:33:07,335 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:33:07,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-12 22:33:07,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 196. [2021-06-12 22:33:07,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.6974358974358974) internal successors, (331), 195 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 331 transitions. [2021-06-12 22:33:07,337 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 331 transitions. Word has length 21 [2021-06-12 22:33:07,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:07,337 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 331 transitions. [2021-06-12 22:33:07,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:07,338 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 331 transitions. [2021-06-12 22:33:07,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:33:07,338 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:07,338 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:07,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-12 22:33:07,549 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:07,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:07,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1990008773, now seen corresponding path program 29 times [2021-06-12 22:33:07,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:07,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705514435] [2021-06-12 22:33:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:07,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:07,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705514435] [2021-06-12 22:33:07,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705514435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:07,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051074672] [2021-06-12 22:33:07,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:07,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:33:07,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:07,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 22:33:07,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:33:07,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051074672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:07,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:07,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-06-12 22:33:07,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789567240] [2021-06-12 22:33:07,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:33:07,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:07,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:33:07,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:33:07,710 INFO L87 Difference]: Start difference. First operand 196 states and 331 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:07,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:07,860 INFO L93 Difference]: Finished difference Result 337 states and 533 transitions. [2021-06-12 22:33:07,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:33:07,860 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:33:07,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:07,861 INFO L225 Difference]: With dead ends: 337 [2021-06-12 22:33:07,861 INFO L226 Difference]: Without dead ends: 330 [2021-06-12 22:33:07,861 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:33:07,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-12 22:33:07,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 213. [2021-06-12 22:33:07,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.7075471698113207) internal successors, (362), 212 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 362 transitions. [2021-06-12 22:33:07,865 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 362 transitions. Word has length 23 [2021-06-12 22:33:07,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:07,865 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 362 transitions. [2021-06-12 22:33:07,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:07,865 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 362 transitions. [2021-06-12 22:33:07,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:33:07,866 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:07,866 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:08,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:08,082 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:08,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:08,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1910209031, now seen corresponding path program 30 times [2021-06-12 22:33:08,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:08,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048415530] [2021-06-12 22:33:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:08,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:08,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048415530] [2021-06-12 22:33:08,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048415530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:08,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191053476] [2021-06-12 22:33:08,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:33:08,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:33:08,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:08,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 22:33:08,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:33:08,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191053476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:08,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:08,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-06-12 22:33:08,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972180940] [2021-06-12 22:33:08,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:33:08,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:08,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:33:08,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:33:08,211 INFO L87 Difference]: Start difference. First operand 213 states and 362 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:08,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:08,415 INFO L93 Difference]: Finished difference Result 390 states and 642 transitions. [2021-06-12 22:33:08,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:33:08,416 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:33:08,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:08,417 INFO L225 Difference]: With dead ends: 390 [2021-06-12 22:33:08,417 INFO L226 Difference]: Without dead ends: 383 [2021-06-12 22:33:08,417 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:33:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-12 22:33:08,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 240. [2021-06-12 22:33:08,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.7447698744769875) internal successors, (417), 239 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:08,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 417 transitions. [2021-06-12 22:33:08,420 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 417 transitions. Word has length 23 [2021-06-12 22:33:08,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:08,420 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 417 transitions. [2021-06-12 22:33:08,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:08,420 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 417 transitions. [2021-06-12 22:33:08,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:33:08,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:08,421 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:08,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 22:33:08,629 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:08,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:08,629 INFO L82 PathProgramCache]: Analyzing trace with hash -89900555, now seen corresponding path program 31 times [2021-06-12 22:33:08,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:08,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199044121] [2021-06-12 22:33:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:08,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:08,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199044121] [2021-06-12 22:33:08,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199044121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:08,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094490984] [2021-06-12 22:33:08,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:08,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 22:33:08,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:33:08,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094490984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:08,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:08,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2021-06-12 22:33:08,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859944] [2021-06-12 22:33:08,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:33:08,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:08,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:33:08,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:33:08,759 INFO L87 Difference]: Start difference. First operand 240 states and 417 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:08,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:08,925 INFO L93 Difference]: Finished difference Result 494 states and 827 transitions. [2021-06-12 22:33:08,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:33:08,925 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:33:08,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:08,926 INFO L225 Difference]: With dead ends: 494 [2021-06-12 22:33:08,926 INFO L226 Difference]: Without dead ends: 487 [2021-06-12 22:33:08,926 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:33:08,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-12 22:33:08,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 281. [2021-06-12 22:33:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.7535714285714286) internal successors, (491), 280 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 491 transitions. [2021-06-12 22:33:08,930 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 491 transitions. Word has length 23 [2021-06-12 22:33:08,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:08,930 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 491 transitions. [2021-06-12 22:33:08,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:08,930 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 491 transitions. [2021-06-12 22:33:08,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:33:08,931 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:08,931 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:09,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 22:33:09,145 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:09,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:09,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1174855409, now seen corresponding path program 32 times [2021-06-12 22:33:09,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:09,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280961870] [2021-06-12 22:33:09,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:09,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:09,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280961870] [2021-06-12 22:33:09,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280961870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:09,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112368317] [2021-06-12 22:33:09,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:09,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:33:09,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:09,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 22:33:09,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:33:09,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112368317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:09,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:09,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2021-06-12 22:33:09,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092081975] [2021-06-12 22:33:09,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:33:09,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:09,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:33:09,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:33:09,275 INFO L87 Difference]: Start difference. First operand 281 states and 491 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:09,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:09,473 INFO L93 Difference]: Finished difference Result 505 states and 846 transitions. [2021-06-12 22:33:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:33:09,473 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:33:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:09,474 INFO L225 Difference]: With dead ends: 505 [2021-06-12 22:33:09,474 INFO L226 Difference]: Without dead ends: 498 [2021-06-12 22:33:09,474 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:33:09,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-12 22:33:09,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 339. [2021-06-12 22:33:09,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.7396449704142012) internal successors, (588), 338 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:09,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 588 transitions. [2021-06-12 22:33:09,479 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 588 transitions. Word has length 23 [2021-06-12 22:33:09,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:09,479 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 588 transitions. [2021-06-12 22:33:09,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:09,479 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 588 transitions. [2021-06-12 22:33:09,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:33:09,479 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:09,479 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:09,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 22:33:09,685 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:09,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:09,685 INFO L82 PathProgramCache]: Analyzing trace with hash -508289285, now seen corresponding path program 33 times [2021-06-12 22:33:09,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:09,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277619248] [2021-06-12 22:33:09,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:09,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:09,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277619248] [2021-06-12 22:33:09,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277619248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:09,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033063266] [2021-06-12 22:33:09,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:09,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:33:09,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:09,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:33:09,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-12 22:33:09,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033063266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:09,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:09,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-12 22:33:09,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085508333] [2021-06-12 22:33:09,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:33:09,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:09,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:33:09,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:33:09,846 INFO L87 Difference]: Start difference. First operand 339 states and 588 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:10,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:10,117 INFO L93 Difference]: Finished difference Result 383 states and 645 transitions. [2021-06-12 22:33:10,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:33:10,118 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:33:10,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:10,118 INFO L225 Difference]: With dead ends: 383 [2021-06-12 22:33:10,118 INFO L226 Difference]: Without dead ends: 249 [2021-06-12 22:33:10,119 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:33:10,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-12 22:33:10,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-06-12 22:33:10,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.7298387096774193) internal successors, (429), 248 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 429 transitions. [2021-06-12 22:33:10,121 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 429 transitions. Word has length 25 [2021-06-12 22:33:10,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:10,122 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 429 transitions. [2021-06-12 22:33:10,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:10,122 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 429 transitions. [2021-06-12 22:33:10,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:33:10,122 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:10,122 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:10,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 22:33:10,335 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:10,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:10,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2072797355, now seen corresponding path program 34 times [2021-06-12 22:33:10,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:10,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247452395] [2021-06-12 22:33:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:10,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:10,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247452395] [2021-06-12 22:33:10,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247452395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:10,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760285731] [2021-06-12 22:33:10,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:33:10,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:33:10,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:10,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:33:10,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:10,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760285731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:10,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:10,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 22:33:10,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781107814] [2021-06-12 22:33:10,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:33:10,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:10,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:33:10,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:33:10,431 INFO L87 Difference]: Start difference. First operand 249 states and 429 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 22:33:10,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:10,512 INFO L93 Difference]: Finished difference Result 352 states and 595 transitions. [2021-06-12 22:33:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:33:10,513 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 22:33:10,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:10,514 INFO L225 Difference]: With dead ends: 352 [2021-06-12 22:33:10,514 INFO L226 Difference]: Without dead ends: 352 [2021-06-12 22:33:10,514 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:33:10,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-12 22:33:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 234. [2021-06-12 22:33:10,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.7124463519313304) internal successors, (399), 233 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:10,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 399 transitions. [2021-06-12 22:33:10,517 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 399 transitions. Word has length 25 [2021-06-12 22:33:10,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:10,517 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 399 transitions. [2021-06-12 22:33:10,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 22:33:10,517 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 399 transitions. [2021-06-12 22:33:10,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:33:10,517 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:10,518 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:10,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 22:33:10,725 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:10,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2069719407, now seen corresponding path program 35 times [2021-06-12 22:33:10,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:10,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859233619] [2021-06-12 22:33:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:10,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:10,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:10,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859233619] [2021-06-12 22:33:10,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859233619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:10,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589686867] [2021-06-12 22:33:10,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:10,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 22:33:10,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:10,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:33:10,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:10,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589686867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:10,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:10,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 22:33:10,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079884536] [2021-06-12 22:33:10,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:33:10,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:10,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:33:10,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:33:10,826 INFO L87 Difference]: Start difference. First operand 234 states and 399 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 22:33:10,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:10,918 INFO L93 Difference]: Finished difference Result 338 states and 551 transitions. [2021-06-12 22:33:10,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:33:10,918 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 22:33:10,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:10,919 INFO L225 Difference]: With dead ends: 338 [2021-06-12 22:33:10,919 INFO L226 Difference]: Without dead ends: 323 [2021-06-12 22:33:10,919 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:33:10,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-12 22:33:10,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 241. [2021-06-12 22:33:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.7041666666666666) internal successors, (409), 240 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:10,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 409 transitions. [2021-06-12 22:33:10,922 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 409 transitions. Word has length 25 [2021-06-12 22:33:10,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:10,922 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 409 transitions. [2021-06-12 22:33:10,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 22:33:10,922 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 409 transitions. [2021-06-12 22:33:10,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:33:10,923 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:10,923 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:11,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 22:33:11,133 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:11,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:11,133 INFO L82 PathProgramCache]: Analyzing trace with hash 417917337, now seen corresponding path program 36 times [2021-06-12 22:33:11,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:11,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830605595] [2021-06-12 22:33:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:11,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:11,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830605595] [2021-06-12 22:33:11,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830605595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:11,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533427346] [2021-06-12 22:33:11,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:33:11,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 22:33:11,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:11,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:33:11,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:11,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533427346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:11,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:11,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 22:33:11,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988108645] [2021-06-12 22:33:11,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:33:11,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:11,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:33:11,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:33:11,232 INFO L87 Difference]: Start difference. First operand 241 states and 409 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 22:33:11,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:11,293 INFO L93 Difference]: Finished difference Result 346 states and 575 transitions. [2021-06-12 22:33:11,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:33:11,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 22:33:11,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:11,294 INFO L225 Difference]: With dead ends: 346 [2021-06-12 22:33:11,294 INFO L226 Difference]: Without dead ends: 346 [2021-06-12 22:33:11,294 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:33:11,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-12 22:33:11,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 234. [2021-06-12 22:33:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.6866952789699572) internal successors, (393), 233 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:11,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 393 transitions. [2021-06-12 22:33:11,297 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 393 transitions. Word has length 25 [2021-06-12 22:33:11,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:11,297 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 393 transitions. [2021-06-12 22:33:11,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 22:33:11,298 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 393 transitions. [2021-06-12 22:33:11,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:33:11,298 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:11,298 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:11,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-12 22:33:11,513 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:11,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:11,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1503952853, now seen corresponding path program 37 times [2021-06-12 22:33:11,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:11,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320455097] [2021-06-12 22:33:11,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:11,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:11,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:11,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320455097] [2021-06-12 22:33:11,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320455097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:11,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940205852] [2021-06-12 22:33:11,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:11,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:33:11,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:11,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940205852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:11,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:11,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 22:33:11,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394908494] [2021-06-12 22:33:11,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:33:11,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:11,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:33:11,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:33:11,618 INFO L87 Difference]: Start difference. First operand 234 states and 393 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 22:33:11,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:11,682 INFO L93 Difference]: Finished difference Result 281 states and 454 transitions. [2021-06-12 22:33:11,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:33:11,682 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 22:33:11,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:11,683 INFO L225 Difference]: With dead ends: 281 [2021-06-12 22:33:11,683 INFO L226 Difference]: Without dead ends: 272 [2021-06-12 22:33:11,683 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:33:11,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-12 22:33:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 225. [2021-06-12 22:33:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.6741071428571428) internal successors, (375), 224 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:11,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 375 transitions. [2021-06-12 22:33:11,686 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 375 transitions. Word has length 25 [2021-06-12 22:33:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:11,686 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 375 transitions. [2021-06-12 22:33:11,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 22:33:11,686 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 375 transitions. [2021-06-12 22:33:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:33:11,687 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:11,687 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:11,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:11,897 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:11,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:11,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2087332515, now seen corresponding path program 38 times [2021-06-12 22:33:11,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:11,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288456287] [2021-06-12 22:33:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:33:11,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:11,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288456287] [2021-06-12 22:33:11,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288456287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:11,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238340310] [2021-06-12 22:33:11,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:11,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:33:11,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:11,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:33:11,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:33:11,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238340310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:11,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:11,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 22:33:11,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506765176] [2021-06-12 22:33:11,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 22:33:11,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:11,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 22:33:11,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:33:11,994 INFO L87 Difference]: Start difference. First operand 225 states and 375 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 22:33:12,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:12,038 INFO L93 Difference]: Finished difference Result 262 states and 421 transitions. [2021-06-12 22:33:12,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:33:12,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 22:33:12,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:12,039 INFO L225 Difference]: With dead ends: 262 [2021-06-12 22:33:12,040 INFO L226 Difference]: Without dead ends: 262 [2021-06-12 22:33:12,040 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:33:12,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-12 22:33:12,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 204. [2021-06-12 22:33:12,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.6600985221674878) internal successors, (337), 203 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 337 transitions. [2021-06-12 22:33:12,042 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 337 transitions. Word has length 25 [2021-06-12 22:33:12,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:12,044 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 337 transitions. [2021-06-12 22:33:12,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 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 22:33:12,044 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 337 transitions. [2021-06-12 22:33:12,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:33:12,044 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:12,044 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:12,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:12,257 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:12,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:12,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1140061405, now seen corresponding path program 39 times [2021-06-12 22:33:12,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:12,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301776801] [2021-06-12 22:33:12,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:12,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:12,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301776801] [2021-06-12 22:33:12,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301776801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:12,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131476844] [2021-06-12 22:33:12,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:12,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:33:12,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:12,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:33:12,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-12 22:33:12,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131476844] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:33:12,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 22:33:12,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2021-06-12 22:33:12,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562286186] [2021-06-12 22:33:12,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:33:12,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:12,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:33:12,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:33:12,367 INFO L87 Difference]: Start difference. First operand 204 states and 337 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:12,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:12,415 INFO L93 Difference]: Finished difference Result 211 states and 345 transitions. [2021-06-12 22:33:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:33:12,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 22:33:12,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:12,416 INFO L225 Difference]: With dead ends: 211 [2021-06-12 22:33:12,416 INFO L226 Difference]: Without dead ends: 39 [2021-06-12 22:33:12,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:33:12,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-12 22:33:12,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-06-12 22:33:12,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:12,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 50 transitions. [2021-06-12 22:33:12,417 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 50 transitions. Word has length 25 [2021-06-12 22:33:12,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:12,417 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 50 transitions. [2021-06-12 22:33:12,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:12,417 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 50 transitions. [2021-06-12 22:33:12,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:33:12,417 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:12,417 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:12,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:12,629 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:12,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:12,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1938530999, now seen corresponding path program 40 times [2021-06-12 22:33:12,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:12,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333175792] [2021-06-12 22:33:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:12,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:12,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333175792] [2021-06-12 22:33:12,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333175792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:12,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321314067] [2021-06-12 22:33:12,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:12,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:33:12,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:12,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:33:12,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:12,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321314067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:12,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:12,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 22:33:12,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248674784] [2021-06-12 22:33:12,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:33:12,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:12,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:33:12,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:33:12,726 INFO L87 Difference]: Start difference. First operand 37 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 22:33:12,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:12,773 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2021-06-12 22:33:12,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:33:12,773 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 22:33:12,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:12,773 INFO L225 Difference]: With dead ends: 54 [2021-06-12 22:33:12,773 INFO L226 Difference]: Without dead ends: 40 [2021-06-12 22:33:12,773 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:33:12,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-12 22:33:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-06-12 22:33:12,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:12,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2021-06-12 22:33:12,774 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 25 [2021-06-12 22:33:12,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:12,774 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2021-06-12 22:33:12,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 22:33:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2021-06-12 22:33:12,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-12 22:33:12,775 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:12,775 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:12,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-12 22:33:12,983 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:12,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:12,983 INFO L82 PathProgramCache]: Analyzing trace with hash 979739577, now seen corresponding path program 41 times [2021-06-12 22:33:12,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:12,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383854486] [2021-06-12 22:33:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:13,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:13,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383854486] [2021-06-12 22:33:13,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383854486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:13,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905140822] [2021-06-12 22:33:13,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:13,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:33:13,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:13,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 22:33:13,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:13,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905140822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:13,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:33:13,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2021-06-12 22:33:13,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110325358] [2021-06-12 22:33:13,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:33:13,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:13,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:33:13,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:33:13,168 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:13,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:13,311 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2021-06-12 22:33:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:33:13,312 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-12 22:33:13,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:13,312 INFO L225 Difference]: With dead ends: 75 [2021-06-12 22:33:13,312 INFO L226 Difference]: Without dead ends: 68 [2021-06-12 22:33:13,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:33:13,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-12 22:33:13,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2021-06-12 22:33:13,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2021-06-12 22:33:13,313 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 27 [2021-06-12 22:33:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:13,313 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2021-06-12 22:33:13,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2021-06-12 22:33:13,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 22:33:13,313 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:33:13,314 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:33:13,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:13,529 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:33:13,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:33:13,529 INFO L82 PathProgramCache]: Analyzing trace with hash -291209033, now seen corresponding path program 42 times [2021-06-12 22:33:13,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:33:13,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337576913] [2021-06-12 22:33:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:33:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:33:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:33:13,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:33:13,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337576913] [2021-06-12 22:33:13,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337576913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:33:13,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041760857] [2021-06-12 22:33:13,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:13,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:33:13,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:33:13,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:33:13,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:33:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-12 22:33:13,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041760857] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:33:13,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 22:33:13,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 18 [2021-06-12 22:33:13,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155686983] [2021-06-12 22:33:13,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:33:13,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:33:13,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:33:13,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:33:13,687 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:13,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:33:13,701 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2021-06-12 22:33:13,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:33:13,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 22:33:13,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:33:13,702 INFO L225 Difference]: With dead ends: 41 [2021-06-12 22:33:13,702 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 22:33:13,702 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:33:13,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 22:33:13,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 22:33:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:13,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 22:33:13,702 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-06-12 22:33:13,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:33:13,702 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 22:33:13,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:33:13,703 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 22:33:13,703 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 22:33:13,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:33:13,905 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 22:33:13,906 INFO L202 PluginConnector]: Adding new model easy1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 10:33:13 BasicIcfg [2021-06-12 22:33:13,906 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 22:33:13,907 INFO L168 Benchmark]: Toolchain (without parser) took 18786.05 ms. Allocated memory was 226.5 MB in the beginning and 323.0 MB in the end (delta: 96.5 MB). Free memory was 206.3 MB in the beginning and 141.4 MB in the end (delta: 64.9 MB). Peak memory consumption was 161.9 MB. Max. memory is 8.0 GB. [2021-06-12 22:33:13,907 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 226.5 MB. Free memory is still 207.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 22:33:13,907 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.25 ms. Allocated memory is still 226.5 MB. Free memory was 206.3 MB in the beginning and 204.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 22:33:13,912 INFO L168 Benchmark]: Boogie Preprocessor took 12.28 ms. Allocated memory is still 226.5 MB. Free memory was 204.8 MB in the beginning and 203.9 MB in the end (delta: 895.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 22:33:13,912 INFO L168 Benchmark]: RCFGBuilder took 237.52 ms. Allocated memory is still 226.5 MB. Free memory was 203.8 MB in the beginning and 194.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-06-12 22:33:13,912 INFO L168 Benchmark]: TraceAbstraction took 18500.62 ms. Allocated memory was 226.5 MB in the beginning and 323.0 MB in the end (delta: 96.5 MB). Free memory was 194.1 MB in the beginning and 141.4 MB in the end (delta: 52.7 MB). Peak memory consumption was 148.3 MB. Max. memory is 8.0 GB. [2021-06-12 22:33:13,912 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 0.10 ms. Allocated memory is still 226.5 MB. Free memory is still 207.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 28.25 ms. Allocated memory is still 226.5 MB. Free memory was 206.3 MB in the beginning and 204.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.28 ms. Allocated memory is still 226.5 MB. Free memory was 204.8 MB in the beginning and 203.9 MB in the end (delta: 895.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 237.52 ms. Allocated memory is still 226.5 MB. Free memory was 203.8 MB in the beginning and 194.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18500.62 ms. Allocated memory was 226.5 MB in the beginning and 323.0 MB in the end (delta: 96.5 MB). Free memory was 194.1 MB in the beginning and 141.4 MB in the end (delta: 52.7 MB). Peak memory consumption was 148.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 37]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18446.9ms, OverallIterations: 47, TraceHistogramMax: 5, EmptinessCheckTime: 27.4ms, AutomataDifference: 3898.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 828 SDtfs, 2654 SDslu, 2656 SDs, 0 SdLazy, 3938 SolverSat, 653 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1733.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1381 GetRequests, 880 SyntacticMatches, 29 SemanticMatches, 472 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 2777.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=339occurred in iteration=37, InterpolantAutomatonStates: 496, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 192.6ms AutomataMinimizationTime, 47 MinimizatonAttempts, 2877 StatesRemovedByMinimization, 45 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 89.1ms SsaConstructionTime, 311.7ms SatisfiabilityAnalysisTime, 3762.9ms InterpolantComputationTime, 1840 NumberOfCodeBlocks, 1814 NumberOfCodeBlocksAsserted, 173 NumberOfCheckSat, 1750 ConstructedInterpolants, 0 QuantifiedInterpolants, 7124 SizeOfPredicates, 59 NumberOfNonLiveVariables, 1583 ConjunctsInSsa, 347 ConjunctsInUnsatCore, 90 InterpolantComputations, 9 PerfectInterpolantSequences, 584/1205 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...