/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/hard1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 22:35:38,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 22:35:38,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 22:35:38,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 22:35:38,515 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 22:35:38,534 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 22:35:38,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 22:35:38,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 22:35:38,535 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 22:35:38,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 22:35:38,537 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 22:35:38,537 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 22:35:38,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 22:35:38,537 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 22:35:38,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 22:35:38,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 22:35:38,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 22:35:38,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 22:35:38,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 22:35:38,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 22:35:38,538 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 22:35:38,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 22:35:38,538 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 22:35:38,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 22:35:38,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 22:35:38,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 22:35:38,539 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 22:35:38,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 22:35:38,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 22:35:38,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 22:35:38,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 22:35:38,539 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 22:35:38,539 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 22:35:38,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 22:35:38,540 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 22:35:38,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 22:35:38,540 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 22:35:38,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 22:35:38,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 22:35:38,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 22:35:38,796 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 22:35:38,798 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 22:35:38,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl [2021-06-12 22:35:38,798 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/hard1.wvr.bpl' [2021-06-12 22:35:38,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 22:35:38,826 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 22:35:38,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 22:35:38,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 22:35:38,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 22:35:38,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:35:38" (1/1) ... [2021-06-12 22:35:38,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:35:38" (1/1) ... [2021-06-12 22:35:38,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 22:35:38,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 22:35:38,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 22:35:38,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 22:35:38,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:35:38" (1/1) ... [2021-06-12 22:35:38,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:35:38" (1/1) ... [2021-06-12 22:35:38,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:35:38" (1/1) ... [2021-06-12 22:35:38,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:35:38" (1/1) ... [2021-06-12 22:35:38,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:35:38" (1/1) ... [2021-06-12 22:35:38,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:35:38" (1/1) ... [2021-06-12 22:35:38,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:35:38" (1/1) ... [2021-06-12 22:35:38,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 22:35:38,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 22:35:38,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 22:35:38,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 22:35:38,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:35:38" (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 22:35:38,915 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 22:35:38,916 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 22:35:38,916 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 22:35:38,916 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 22:35:38,916 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 22:35:38,916 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 22:35:38,916 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 22:35:38,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 22:35:38,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 22:35:38,917 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 22:35:38,918 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 22:35:38,918 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 22:35:38,918 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-12 22:35:38,918 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-12 22:35:38,918 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-12 22:35:38,919 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 22:35:39,109 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 22:35:39,109 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 22:35:39,111 INFO L202 PluginConnector]: Adding new model hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:35:39 BoogieIcfgContainer [2021-06-12 22:35:39,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 22:35:39,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 22:35:39,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 22:35:39,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 22:35:39,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:35:38" (1/2) ... [2021-06-12 22:35:39,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a43645 and model type hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 10:35:39, skipping insertion in model container [2021-06-12 22:35:39,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "hard1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:35:39" (2/2) ... [2021-06-12 22:35:39,115 INFO L111 eAbstractionObserver]: Analyzing ICFG hard1.wvr.bpl [2021-06-12 22:35:39,119 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 22:35:39,119 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 22:35:39,119 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 22:35:39,120 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 22:35:39,153 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-12 22:35:39,166 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-12 22:35:39,177 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 22:35:39,177 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 22:35:39,177 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 22:35:39,177 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 22:35:39,177 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 22:35:39,177 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 22:35:39,178 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 22:35:39,178 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 22:35:39,184 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 42 places, 33 transitions, 98 flow [2021-06-12 22:35:39,272 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:39,274 INFO L276 IsEmpty]: Start isEmpty. Operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:39,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 22:35:39,283 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:39,284 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:39,284 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:39,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:39,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1363796692, now seen corresponding path program 1 times [2021-06-12 22:35:39,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:39,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162852212] [2021-06-12 22:35:39,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:39,403 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 22:35:39,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:39,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162852212] [2021-06-12 22:35:39,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162852212] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:35:39,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:35:39,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 22:35:39,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472574916] [2021-06-12 22:35:39,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 22:35:39,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:39,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 22:35:39,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 22:35:39,417 INFO L87 Difference]: Start difference. First operand has 431 states, 429 states have (on average 3.8578088578088576) internal successors, (1655), 430 states have internal predecessors, (1655), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 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 22:35:39,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:39,455 INFO L93 Difference]: Finished difference Result 854 states and 3302 transitions. [2021-06-12 22:35:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 22:35:39,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 19 [2021-06-12 22:35:39,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:39,470 INFO L225 Difference]: With dead ends: 854 [2021-06-12 22:35:39,470 INFO L226 Difference]: Without dead ends: 823 [2021-06-12 22:35:39,471 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 22:35:39,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-06-12 22:35:39,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 558. [2021-06-12 22:35:39,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.8545780969479355) internal successors, (2147), 557 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 2147 transitions. [2021-06-12 22:35:39,555 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 2147 transitions. Word has length 19 [2021-06-12 22:35:39,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:39,556 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 2147 transitions. [2021-06-12 22:35:39,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 22:35:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 2147 transitions. [2021-06-12 22:35:39,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:35:39,569 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:39,569 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:39,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 22:35:39,571 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:39,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:39,572 INFO L82 PathProgramCache]: Analyzing trace with hash -669454164, now seen corresponding path program 1 times [2021-06-12 22:35:39,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:39,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413995278] [2021-06-12 22:35:39,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:39,614 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 22:35:39,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:39,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413995278] [2021-06-12 22:35:39,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413995278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:39,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054385288] [2021-06-12 22:35:39,615 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 22:35:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:39,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 22:35:39,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:39,734 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 22:35:39,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054385288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:39,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:39,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-12 22:35:39,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274397744] [2021-06-12 22:35:39,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:35:39,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:39,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:35:39,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:39,744 INFO L87 Difference]: Start difference. First operand 558 states and 2147 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:39,861 INFO L93 Difference]: Finished difference Result 1573 states and 5792 transitions. [2021-06-12 22:35:39,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 22:35:39,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:35:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:39,869 INFO L225 Difference]: With dead ends: 1573 [2021-06-12 22:35:39,869 INFO L226 Difference]: Without dead ends: 1573 [2021-06-12 22:35:39,870 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:35:39,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2021-06-12 22:35:39,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 863. [2021-06-12 22:35:39,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.960556844547564) internal successors, (3414), 862 states have internal predecessors, (3414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 3414 transitions. [2021-06-12 22:35:39,908 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 3414 transitions. Word has length 21 [2021-06-12 22:35:39,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:39,909 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 3414 transitions. [2021-06-12 22:35:39,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:39,909 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 3414 transitions. [2021-06-12 22:35:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:35:39,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:39,912 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:40,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-12 22:35:40,125 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:40,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:40,126 INFO L82 PathProgramCache]: Analyzing trace with hash 421259310, now seen corresponding path program 1 times [2021-06-12 22:35:40,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:40,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039117332] [2021-06-12 22:35:40,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:40,198 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 22:35:40,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:40,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039117332] [2021-06-12 22:35:40,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039117332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:40,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837601627] [2021-06-12 22:35:40,199 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 22:35:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:40,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 22:35:40,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:40,266 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 22:35:40,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837601627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:40,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:40,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-12 22:35:40,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857919735] [2021-06-12 22:35:40,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:35:40,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:40,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:35:40,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:40,267 INFO L87 Difference]: Start difference. First operand 863 states and 3414 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:40,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:40,341 INFO L93 Difference]: Finished difference Result 1748 states and 6572 transitions. [2021-06-12 22:35:40,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 22:35:40,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 22:35:40,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:40,349 INFO L225 Difference]: With dead ends: 1748 [2021-06-12 22:35:40,349 INFO L226 Difference]: Without dead ends: 1748 [2021-06-12 22:35:40,350 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:35:40,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-06-12 22:35:40,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 927. [2021-06-12 22:35:40,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 3.970842332613391) internal successors, (3677), 926 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 3677 transitions. [2021-06-12 22:35:40,377 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 3677 transitions. Word has length 21 [2021-06-12 22:35:40,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:40,377 INFO L482 AbstractCegarLoop]: Abstraction has 927 states and 3677 transitions. [2021-06-12 22:35:40,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 3677 transitions. [2021-06-12 22:35:40,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:35:40,380 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:40,381 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:40,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:40,597 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:40,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:40,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1822537518, now seen corresponding path program 1 times [2021-06-12 22:35:40,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:40,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004732110] [2021-06-12 22:35:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:40,627 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 22:35:40,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:40,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004732110] [2021-06-12 22:35:40,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004732110] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:35:40,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:35:40,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 22:35:40,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363310194] [2021-06-12 22:35:40,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:35:40,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:40,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:35:40,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:35:40,628 INFO L87 Difference]: Start difference. First operand 927 states and 3677 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 22:35:40,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:40,682 INFO L93 Difference]: Finished difference Result 997 states and 3621 transitions. [2021-06-12 22:35:40,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 22:35:40,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 22:35:40,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:40,686 INFO L225 Difference]: With dead ends: 997 [2021-06-12 22:35:40,686 INFO L226 Difference]: Without dead ends: 884 [2021-06-12 22:35:40,686 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:35:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-06-12 22:35:40,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 808. [2021-06-12 22:35:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.758364312267658) internal successors, (3033), 807 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 3033 transitions. [2021-06-12 22:35:40,704 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 3033 transitions. Word has length 21 [2021-06-12 22:35:40,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:40,704 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 3033 transitions. [2021-06-12 22:35:40,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 22:35:40,705 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 3033 transitions. [2021-06-12 22:35:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 22:35:40,706 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:40,706 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:40,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 22:35:40,707 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:40,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:40,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2021695698, now seen corresponding path program 2 times [2021-06-12 22:35:40,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:40,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284715044] [2021-06-12 22:35:40,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:40,749 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 22:35:40,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:40,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284715044] [2021-06-12 22:35:40,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284715044] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:35:40,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:35:40,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 22:35:40,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759096926] [2021-06-12 22:35:40,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:35:40,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:40,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:35:40,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:35:40,751 INFO L87 Difference]: Start difference. First operand 808 states and 3033 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 22:35:40,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:40,809 INFO L93 Difference]: Finished difference Result 949 states and 3541 transitions. [2021-06-12 22:35:40,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 22:35:40,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 22:35:40,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:40,813 INFO L225 Difference]: With dead ends: 949 [2021-06-12 22:35:40,813 INFO L226 Difference]: Without dead ends: 949 [2021-06-12 22:35:40,814 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:35:40,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-06-12 22:35:40,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 729. [2021-06-12 22:35:40,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.782967032967033) internal successors, (2754), 728 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:40,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2754 transitions. [2021-06-12 22:35:40,831 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2754 transitions. Word has length 21 [2021-06-12 22:35:40,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:40,831 INFO L482 AbstractCegarLoop]: Abstraction has 729 states and 2754 transitions. [2021-06-12 22:35:40,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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 22:35:40,831 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2754 transitions. [2021-06-12 22:35:40,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:40,833 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:40,833 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:40,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 22:35:40,833 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:40,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:40,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1964497838, now seen corresponding path program 1 times [2021-06-12 22:35:40,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:40,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162949415] [2021-06-12 22:35:40,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:40,862 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 22:35:40,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:40,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162949415] [2021-06-12 22:35:40,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162949415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:40,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2656855] [2021-06-12 22:35:40,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:35:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:40,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:35:40,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:41,053 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 22:35:41,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2656855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:41,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:41,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-12 22:35:41,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870201219] [2021-06-12 22:35:41,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 22:35:41,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:41,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 22:35:41,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:35:41,059 INFO L87 Difference]: Start difference. First operand 729 states and 2754 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:41,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:41,164 INFO L93 Difference]: Finished difference Result 1389 states and 5122 transitions. [2021-06-12 22:35:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:35:41,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:35:41,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:41,170 INFO L225 Difference]: With dead ends: 1389 [2021-06-12 22:35:41,170 INFO L226 Difference]: Without dead ends: 1389 [2021-06-12 22:35:41,171 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:35:41,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2021-06-12 22:35:41,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 892. [2021-06-12 22:35:41,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.772166105499439) internal successors, (3361), 891 states have internal predecessors, (3361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:41,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3361 transitions. [2021-06-12 22:35:41,197 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3361 transitions. Word has length 23 [2021-06-12 22:35:41,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:41,197 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3361 transitions. [2021-06-12 22:35:41,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:41,197 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3361 transitions. [2021-06-12 22:35:41,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:41,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:41,199 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:41,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:41,413 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:41,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:41,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1231348690, now seen corresponding path program 1 times [2021-06-12 22:35:41,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:41,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73021613] [2021-06-12 22:35:41,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:41,478 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 22:35:41,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:41,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73021613] [2021-06-12 22:35:41,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73021613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:41,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656712722] [2021-06-12 22:35:41,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:41,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:35:41,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:41,565 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 22:35:41,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656712722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:41,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:41,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:35:41,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346050126] [2021-06-12 22:35:41,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:35:41,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:41,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:35:41,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:41,566 INFO L87 Difference]: Start difference. First operand 892 states and 3361 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:41,609 INFO L93 Difference]: Finished difference Result 1781 states and 6589 transitions. [2021-06-12 22:35:41,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 22:35:41,610 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 22:35:41,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:41,617 INFO L225 Difference]: With dead ends: 1781 [2021-06-12 22:35:41,617 INFO L226 Difference]: Without dead ends: 1738 [2021-06-12 22:35:41,617 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:41,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-06-12 22:35:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1055. [2021-06-12 22:35:41,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 3.8055028462998104) internal successors, (4011), 1054 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 4011 transitions. [2021-06-12 22:35:41,649 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 4011 transitions. Word has length 23 [2021-06-12 22:35:41,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:41,649 INFO L482 AbstractCegarLoop]: Abstraction has 1055 states and 4011 transitions. [2021-06-12 22:35:41,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:41,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 4011 transitions. [2021-06-12 22:35:41,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:41,651 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:41,651 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:41,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:41,865 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:41,865 INFO L82 PathProgramCache]: Analyzing trace with hash -516640296, now seen corresponding path program 2 times [2021-06-12 22:35:41,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:41,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525021935] [2021-06-12 22:35:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:41,914 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 22:35:41,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:41,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525021935] [2021-06-12 22:35:41,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525021935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:41,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637041411] [2021-06-12 22:35:41,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:41,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:35:41,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:41,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:35:41,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:42,009 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 22:35:42,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637041411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:42,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:42,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:35:42,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813137308] [2021-06-12 22:35:42,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:35:42,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:42,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:35:42,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:42,011 INFO L87 Difference]: Start difference. First operand 1055 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:42,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:42,069 INFO L93 Difference]: Finished difference Result 1504 states and 5657 transitions. [2021-06-12 22:35:42,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 22:35:42,070 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 22:35:42,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:42,077 INFO L225 Difference]: With dead ends: 1504 [2021-06-12 22:35:42,077 INFO L226 Difference]: Without dead ends: 1461 [2021-06-12 22:35:42,077 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:42,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2021-06-12 22:35:42,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1067. [2021-06-12 22:35:42,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.8227016885553473) internal successors, (4075), 1066 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:42,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 4075 transitions. [2021-06-12 22:35:42,100 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 4075 transitions. Word has length 23 [2021-06-12 22:35:42,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:42,100 INFO L482 AbstractCegarLoop]: Abstraction has 1067 states and 4075 transitions. [2021-06-12 22:35:42,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:42,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 4075 transitions. [2021-06-12 22:35:42,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:42,103 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:42,103 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:42,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:42,317 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:42,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:42,317 INFO L82 PathProgramCache]: Analyzing trace with hash -28423604, now seen corresponding path program 3 times [2021-06-12 22:35:42,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:42,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933766131] [2021-06-12 22:35:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:42,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:42,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:42,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933766131] [2021-06-12 22:35:42,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933766131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:42,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937249901] [2021-06-12 22:35:42,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:42,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:35:42,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:42,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:35:42,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:42,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937249901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:42,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:42,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:35:42,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547074900] [2021-06-12 22:35:42,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:35:42,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:42,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:35:42,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:42,442 INFO L87 Difference]: Start difference. First operand 1067 states and 4075 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:42,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:42,482 INFO L93 Difference]: Finished difference Result 1444 states and 5469 transitions. [2021-06-12 22:35:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 22:35:42,483 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 22:35:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:42,489 INFO L225 Difference]: With dead ends: 1444 [2021-06-12 22:35:42,489 INFO L226 Difference]: Without dead ends: 1401 [2021-06-12 22:35:42,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:42,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-06-12 22:35:42,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1086. [2021-06-12 22:35:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 3.8359447004608294) internal successors, (4162), 1085 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:42,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 4162 transitions. [2021-06-12 22:35:42,510 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 4162 transitions. Word has length 23 [2021-06-12 22:35:42,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:42,511 INFO L482 AbstractCegarLoop]: Abstraction has 1086 states and 4162 transitions. [2021-06-12 22:35:42,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:42,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 4162 transitions. [2021-06-12 22:35:42,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:42,514 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:42,514 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:42,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:42,730 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:42,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:42,731 INFO L82 PathProgramCache]: Analyzing trace with hash -725562960, now seen corresponding path program 1 times [2021-06-12 22:35:42,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:42,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040767040] [2021-06-12 22:35:42,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:42,783 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 22:35:42,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:42,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040767040] [2021-06-12 22:35:42,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040767040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:42,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207387592] [2021-06-12 22:35:42,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:42,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:35:42,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:43,004 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 22:35:43,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207387592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:43,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:43,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:35:43,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594350916] [2021-06-12 22:35:43,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:35:43,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:43,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:35:43,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:43,006 INFO L87 Difference]: Start difference. First operand 1086 states and 4162 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:43,058 INFO L93 Difference]: Finished difference Result 2517 states and 9613 transitions. [2021-06-12 22:35:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 22:35:43,058 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 22:35:43,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:43,068 INFO L225 Difference]: With dead ends: 2517 [2021-06-12 22:35:43,068 INFO L226 Difference]: Without dead ends: 2474 [2021-06-12 22:35:43,068 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:43,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-06-12 22:35:43,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1252. [2021-06-12 22:35:43,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 3.906474820143885) internal successors, (4887), 1251 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 4887 transitions. [2021-06-12 22:35:43,115 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 4887 transitions. Word has length 23 [2021-06-12 22:35:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:43,115 INFO L482 AbstractCegarLoop]: Abstraction has 1252 states and 4887 transitions. [2021-06-12 22:35:43,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:43,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 4887 transitions. [2021-06-12 22:35:43,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:43,118 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:43,118 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:43,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 22:35:43,333 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:43,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:43,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2110243560, now seen corresponding path program 2 times [2021-06-12 22:35:43,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:43,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650798383] [2021-06-12 22:35:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:43,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:43,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650798383] [2021-06-12 22:35:43,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650798383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:43,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756451058] [2021-06-12 22:35:43,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:43,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:35:43,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:43,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:35:43,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:43,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756451058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:43,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:43,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:35:43,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31328154] [2021-06-12 22:35:43,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:35:43,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:43,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:35:43,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:43,442 INFO L87 Difference]: Start difference. First operand 1252 states and 4887 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:43,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:43,499 INFO L93 Difference]: Finished difference Result 2128 states and 8197 transitions. [2021-06-12 22:35:43,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 22:35:43,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 22:35:43,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:43,505 INFO L225 Difference]: With dead ends: 2128 [2021-06-12 22:35:43,505 INFO L226 Difference]: Without dead ends: 2085 [2021-06-12 22:35:43,505 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:43,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2021-06-12 22:35:43,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 1324. [2021-06-12 22:35:43,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 3.9554043839758126) internal successors, (5233), 1323 states have internal predecessors, (5233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 5233 transitions. [2021-06-12 22:35:43,531 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 5233 transitions. Word has length 23 [2021-06-12 22:35:43,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:43,531 INFO L482 AbstractCegarLoop]: Abstraction has 1324 states and 5233 transitions. [2021-06-12 22:35:43,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:43,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 5233 transitions. [2021-06-12 22:35:43,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:43,534 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:43,534 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:43,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-12 22:35:43,749 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:43,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:43,749 INFO L82 PathProgramCache]: Analyzing trace with hash 338647000, now seen corresponding path program 3 times [2021-06-12 22:35:43,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:43,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871638640] [2021-06-12 22:35:43,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:43,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:43,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871638640] [2021-06-12 22:35:43,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871638640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:43,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543187214] [2021-06-12 22:35:43,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:35:43,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:35:43,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:43,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:35:43,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:43,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543187214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:43,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:43,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:35:43,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137130690] [2021-06-12 22:35:43,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:35:43,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:43,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:35:43,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:43,869 INFO L87 Difference]: Start difference. First operand 1324 states and 5233 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:43,931 INFO L93 Difference]: Finished difference Result 2247 states and 8749 transitions. [2021-06-12 22:35:43,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 22:35:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 22:35:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:43,937 INFO L225 Difference]: With dead ends: 2247 [2021-06-12 22:35:43,937 INFO L226 Difference]: Without dead ends: 2204 [2021-06-12 22:35:43,937 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-06-12 22:35:43,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1380. [2021-06-12 22:35:43,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.989122552574329) internal successors, (5501), 1379 states have internal predecessors, (5501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:43,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 5501 transitions. [2021-06-12 22:35:43,964 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 5501 transitions. Word has length 23 [2021-06-12 22:35:43,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:43,964 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 5501 transitions. [2021-06-12 22:35:43,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:43,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 5501 transitions. [2021-06-12 22:35:43,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:43,967 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:43,967 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:44,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:44,181 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:44,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:44,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1032459728, now seen corresponding path program 1 times [2021-06-12 22:35:44,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:44,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036116325] [2021-06-12 22:35:44,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:44,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:44,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036116325] [2021-06-12 22:35:44,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036116325] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:35:44,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:35:44,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 22:35:44,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40723603] [2021-06-12 22:35:44,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 22:35:44,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:44,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 22:35:44,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 22:35:44,202 INFO L87 Difference]: Start difference. First operand 1380 states and 5501 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:44,235 INFO L93 Difference]: Finished difference Result 1413 states and 5603 transitions. [2021-06-12 22:35:44,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 22:35:44,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 22:35:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:44,239 INFO L225 Difference]: With dead ends: 1413 [2021-06-12 22:35:44,239 INFO L226 Difference]: Without dead ends: 1413 [2021-06-12 22:35:44,239 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 22:35:44,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-06-12 22:35:44,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1394. [2021-06-12 22:35:44,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1393 states have (on average 3.974156496769562) internal successors, (5536), 1393 states have internal predecessors, (5536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:44,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 5536 transitions. [2021-06-12 22:35:44,263 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 5536 transitions. Word has length 23 [2021-06-12 22:35:44,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:44,263 INFO L482 AbstractCegarLoop]: Abstraction has 1394 states and 5536 transitions. [2021-06-12 22:35:44,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:44,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 5536 transitions. [2021-06-12 22:35:44,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:44,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:44,266 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:44,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-12 22:35:44,266 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:44,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:44,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1753811376, now seen corresponding path program 4 times [2021-06-12 22:35:44,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:44,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570800045] [2021-06-12 22:35:44,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:44,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:44,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570800045] [2021-06-12 22:35:44,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570800045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:44,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809724972] [2021-06-12 22:35:44,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:35:44,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:35:44,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:44,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:35:44,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:44,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809724972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:44,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:44,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:35:44,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128573166] [2021-06-12 22:35:44,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:35:44,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:44,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:35:44,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:44,364 INFO L87 Difference]: Start difference. First operand 1394 states and 5536 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:44,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:44,418 INFO L93 Difference]: Finished difference Result 2930 states and 11376 transitions. [2021-06-12 22:35:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 22:35:44,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 22:35:44,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:44,426 INFO L225 Difference]: With dead ends: 2930 [2021-06-12 22:35:44,426 INFO L226 Difference]: Without dead ends: 2887 [2021-06-12 22:35:44,426 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:44,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2021-06-12 22:35:44,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 1526. [2021-06-12 22:35:44,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 4.028196721311476) internal successors, (6143), 1525 states have internal predecessors, (6143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 6143 transitions. [2021-06-12 22:35:44,460 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 6143 transitions. Word has length 23 [2021-06-12 22:35:44,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:44,460 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 6143 transitions. [2021-06-12 22:35:44,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:44,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 6143 transitions. [2021-06-12 22:35:44,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:44,464 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:44,464 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:44,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:44,682 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:44,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:44,682 INFO L82 PathProgramCache]: Analyzing trace with hash -781102980, now seen corresponding path program 5 times [2021-06-12 22:35:44,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:44,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819799166] [2021-06-12 22:35:44,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:44,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:44,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819799166] [2021-06-12 22:35:44,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819799166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:44,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868333415] [2021-06-12 22:35:44,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:44,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:35:44,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:44,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:35:44,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:44,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868333415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:44,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:44,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:35:44,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860446969] [2021-06-12 22:35:44,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:35:44,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:44,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:35:44,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:44,798 INFO L87 Difference]: Start difference. First operand 1526 states and 6143 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:44,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:44,847 INFO L93 Difference]: Finished difference Result 2434 states and 9626 transitions. [2021-06-12 22:35:44,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 22:35:44,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 22:35:44,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:44,853 INFO L225 Difference]: With dead ends: 2434 [2021-06-12 22:35:44,853 INFO L226 Difference]: Without dead ends: 2391 [2021-06-12 22:35:44,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:44,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-12 22:35:44,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1578. [2021-06-12 22:35:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 4.062777425491439) internal successors, (6407), 1577 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:44,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 6407 transitions. [2021-06-12 22:35:44,884 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 6407 transitions. Word has length 23 [2021-06-12 22:35:44,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:44,884 INFO L482 AbstractCegarLoop]: Abstraction has 1578 states and 6407 transitions. [2021-06-12 22:35:44,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:44,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 6407 transitions. [2021-06-12 22:35:44,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:44,887 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:44,887 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:45,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 22:35:45,101 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:45,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:45,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1742267756, now seen corresponding path program 6 times [2021-06-12 22:35:45,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:45,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760807751] [2021-06-12 22:35:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:45,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:45,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760807751] [2021-06-12 22:35:45,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760807751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:45,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058632060] [2021-06-12 22:35:45,140 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 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 22:35:45,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:35:45,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:45,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:35:45,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:45,245 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 22:35:45,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058632060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:45,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:45,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 22:35:45,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786320082] [2021-06-12 22:35:45,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:35:45,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:45,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:35:45,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:35:45,246 INFO L87 Difference]: Start difference. First operand 1578 states and 6407 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:45,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:45,340 INFO L93 Difference]: Finished difference Result 2600 states and 10380 transitions. [2021-06-12 22:35:45,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:35:45,340 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:35:45,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:45,346 INFO L225 Difference]: With dead ends: 2600 [2021-06-12 22:35:45,346 INFO L226 Difference]: Without dead ends: 2557 [2021-06-12 22:35:45,346 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:35:45,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-06-12 22:35:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 1678. [2021-06-12 22:35:45,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 4.128205128205129) internal successors, (6923), 1677 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6923 transitions. [2021-06-12 22:35:45,381 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6923 transitions. Word has length 23 [2021-06-12 22:35:45,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:45,381 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 6923 transitions. [2021-06-12 22:35:45,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:45,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6923 transitions. [2021-06-12 22:35:45,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:45,384 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:45,384 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:45,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 22:35:45,602 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:45,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:45,602 INFO L82 PathProgramCache]: Analyzing trace with hash -413926864, now seen corresponding path program 2 times [2021-06-12 22:35:45,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:45,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987329936] [2021-06-12 22:35:45,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:45,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:45,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987329936] [2021-06-12 22:35:45,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987329936] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:35:45,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:35:45,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 22:35:45,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230714053] [2021-06-12 22:35:45,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:35:45,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:45,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:35:45,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:35:45,624 INFO L87 Difference]: Start difference. First operand 1678 states and 6923 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:45,661 INFO L93 Difference]: Finished difference Result 1899 states and 7725 transitions. [2021-06-12 22:35:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 22:35:45,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 22:35:45,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:45,666 INFO L225 Difference]: With dead ends: 1899 [2021-06-12 22:35:45,666 INFO L226 Difference]: Without dead ends: 1866 [2021-06-12 22:35:45,666 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:35:45,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-06-12 22:35:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1777. [2021-06-12 22:35:45,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1777 states, 1776 states have (on average 4.108671171171171) internal successors, (7297), 1776 states have internal predecessors, (7297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:45,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 7297 transitions. [2021-06-12 22:35:45,694 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 7297 transitions. Word has length 23 [2021-06-12 22:35:45,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:45,694 INFO L482 AbstractCegarLoop]: Abstraction has 1777 states and 7297 transitions. [2021-06-12 22:35:45,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:45,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 7297 transitions. [2021-06-12 22:35:45,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:45,697 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:45,697 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:45,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-12 22:35:45,697 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:45,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:45,698 INFO L82 PathProgramCache]: Analyzing trace with hash 97493908, now seen corresponding path program 2 times [2021-06-12 22:35:45,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:45,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903236520] [2021-06-12 22:35:45,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:45,712 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 22:35:45,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:45,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903236520] [2021-06-12 22:35:45,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903236520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:45,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336201888] [2021-06-12 22:35:45,712 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:45,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:35:45,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:45,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:35:45,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:45,780 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 22:35:45,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336201888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:45,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:45,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-12 22:35:45,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962510086] [2021-06-12 22:35:45,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:35:45,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:45,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:35:45,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:35:45,781 INFO L87 Difference]: Start difference. First operand 1777 states and 7297 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:45,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:45,924 INFO L93 Difference]: Finished difference Result 3584 states and 13842 transitions. [2021-06-12 22:35:45,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:35:45,925 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 22:35:45,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:45,936 INFO L225 Difference]: With dead ends: 3584 [2021-06-12 22:35:45,936 INFO L226 Difference]: Without dead ends: 3584 [2021-06-12 22:35:45,937 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:35:45,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3584 states. [2021-06-12 22:35:45,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3584 to 2158. [2021-06-12 22:35:45,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 4.179879462216041) internal successors, (9016), 2157 states have internal predecessors, (9016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:45,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 9016 transitions. [2021-06-12 22:35:45,991 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 9016 transitions. Word has length 23 [2021-06-12 22:35:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:45,991 INFO L482 AbstractCegarLoop]: Abstraction has 2158 states and 9016 transitions. [2021-06-12 22:35:45,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 9016 transitions. [2021-06-12 22:35:45,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:45,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:45,995 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:46,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 22:35:46,195 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:46,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:46,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1352231348, now seen corresponding path program 3 times [2021-06-12 22:35:46,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:46,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635156872] [2021-06-12 22:35:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:46,211 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 22:35:46,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:46,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635156872] [2021-06-12 22:35:46,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635156872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:46,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369188004] [2021-06-12 22:35:46,211 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 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 22:35:46,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:35:46,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:46,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:35:46,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:46,277 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 22:35:46,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369188004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:46,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:46,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-12 22:35:46,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622821192] [2021-06-12 22:35:46,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:35:46,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:46,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:35:46,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:35:46,279 INFO L87 Difference]: Start difference. First operand 2158 states and 9016 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:46,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:46,453 INFO L93 Difference]: Finished difference Result 4126 states and 16268 transitions. [2021-06-12 22:35:46,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:35:46,453 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 22:35:46,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:46,462 INFO L225 Difference]: With dead ends: 4126 [2021-06-12 22:35:46,462 INFO L226 Difference]: Without dead ends: 4126 [2021-06-12 22:35:46,462 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:35:46,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-12 22:35:46,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2337. [2021-06-12 22:35:46,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 4.2555650684931505) internal successors, (9941), 2336 states have internal predecessors, (9941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 9941 transitions. [2021-06-12 22:35:46,513 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 9941 transitions. Word has length 23 [2021-06-12 22:35:46,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:46,513 INFO L482 AbstractCegarLoop]: Abstraction has 2337 states and 9941 transitions. [2021-06-12 22:35:46,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:46,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 9941 transitions. [2021-06-12 22:35:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:46,517 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:46,517 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:46,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:46,733 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:46,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:46,734 INFO L82 PathProgramCache]: Analyzing trace with hash -424342964, now seen corresponding path program 4 times [2021-06-12 22:35:46,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:46,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191397461] [2021-06-12 22:35:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:46,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:46,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191397461] [2021-06-12 22:35:46,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191397461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:46,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607618653] [2021-06-12 22:35:46,762 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 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 22:35:46,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:35:46,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:46,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:35:46,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:46,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607618653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:46,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:46,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:35:46,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231923425] [2021-06-12 22:35:46,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:35:46,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:46,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:35:46,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:46,844 INFO L87 Difference]: Start difference. First operand 2337 states and 9941 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:46,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:46,893 INFO L93 Difference]: Finished difference Result 2707 states and 11337 transitions. [2021-06-12 22:35:46,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 22:35:46,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 22:35:46,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:46,898 INFO L225 Difference]: With dead ends: 2707 [2021-06-12 22:35:46,898 INFO L226 Difference]: Without dead ends: 2643 [2021-06-12 22:35:46,898 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2643 states. [2021-06-12 22:35:46,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2643 to 2343. [2021-06-12 22:35:46,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 4.259180187873612) internal successors, (9975), 2342 states have internal predecessors, (9975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 9975 transitions. [2021-06-12 22:35:46,935 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 9975 transitions. Word has length 23 [2021-06-12 22:35:46,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:46,935 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 9975 transitions. [2021-06-12 22:35:46,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:46,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 9975 transitions. [2021-06-12 22:35:46,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:46,939 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:46,939 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:47,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:47,153 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:47,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:47,153 INFO L82 PathProgramCache]: Analyzing trace with hash 63873728, now seen corresponding path program 5 times [2021-06-12 22:35:47,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:47,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325352584] [2021-06-12 22:35:47,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:47,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:47,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325352584] [2021-06-12 22:35:47,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325352584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:47,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833068565] [2021-06-12 22:35:47,184 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 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 22:35:47,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:35:47,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:47,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:35:47,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:47,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833068565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:47,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:47,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:35:47,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651588732] [2021-06-12 22:35:47,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:35:47,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:47,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:35:47,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:47,238 INFO L87 Difference]: Start difference. First operand 2343 states and 9975 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:47,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:47,297 INFO L93 Difference]: Finished difference Result 2722 states and 11385 transitions. [2021-06-12 22:35:47,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 22:35:47,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 22:35:47,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:47,302 INFO L225 Difference]: With dead ends: 2722 [2021-06-12 22:35:47,302 INFO L226 Difference]: Without dead ends: 2658 [2021-06-12 22:35:47,302 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:47,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2658 states. [2021-06-12 22:35:47,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2658 to 2347. [2021-06-12 22:35:47,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 4.2621483375959075) internal successors, (9999), 2346 states have internal predecessors, (9999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:47,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 9999 transitions. [2021-06-12 22:35:47,339 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 9999 transitions. Word has length 23 [2021-06-12 22:35:47,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:47,340 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 9999 transitions. [2021-06-12 22:35:47,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:47,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 9999 transitions. [2021-06-12 22:35:47,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:47,344 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:47,344 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:47,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:47,560 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:47,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:47,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1522443284, now seen corresponding path program 6 times [2021-06-12 22:35:47,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:47,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76459780] [2021-06-12 22:35:47,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:47,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:47,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76459780] [2021-06-12 22:35:47,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76459780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:47,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440938062] [2021-06-12 22:35:47,592 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 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 22:35:47,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:35:47,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:47,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:35:47,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:47,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440938062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:47,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:47,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 22:35:47,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175171082] [2021-06-12 22:35:47,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 22:35:47,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:47,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 22:35:47,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:47,651 INFO L87 Difference]: Start difference. First operand 2347 states and 9999 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:47,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:47,720 INFO L93 Difference]: Finished difference Result 3086 states and 12754 transitions. [2021-06-12 22:35:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 22:35:47,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 22:35:47,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:47,725 INFO L225 Difference]: With dead ends: 3086 [2021-06-12 22:35:47,726 INFO L226 Difference]: Without dead ends: 3022 [2021-06-12 22:35:47,726 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 22:35:47,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-06-12 22:35:47,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2368. [2021-06-12 22:35:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 4.27291930713984) internal successors, (10114), 2367 states have internal predecessors, (10114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 10114 transitions. [2021-06-12 22:35:47,776 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 10114 transitions. Word has length 23 [2021-06-12 22:35:47,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:47,776 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 10114 transitions. [2021-06-12 22:35:47,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:47,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 10114 transitions. [2021-06-12 22:35:47,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:47,780 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:47,780 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:47,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 22:35:47,998 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:47,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:47,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1523854228, now seen corresponding path program 3 times [2021-06-12 22:35:47,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:47,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127598026] [2021-06-12 22:35:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:35:48,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:48,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127598026] [2021-06-12 22:35:48,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127598026] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:35:48,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:35:48,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 22:35:48,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744565855] [2021-06-12 22:35:48,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:35:48,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:48,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:35:48,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:35:48,015 INFO L87 Difference]: Start difference. First operand 2368 states and 10114 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:48,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:48,057 INFO L93 Difference]: Finished difference Result 2525 states and 10725 transitions. [2021-06-12 22:35:48,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 22:35:48,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 22:35:48,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:48,061 INFO L225 Difference]: With dead ends: 2525 [2021-06-12 22:35:48,061 INFO L226 Difference]: Without dead ends: 2525 [2021-06-12 22:35:48,062 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:35:48,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-06-12 22:35:48,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 2414. [2021-06-12 22:35:48,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 4.261500207210941) internal successors, (10283), 2413 states have internal predecessors, (10283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:48,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 10283 transitions. [2021-06-12 22:35:48,097 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 10283 transitions. Word has length 23 [2021-06-12 22:35:48,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:48,098 INFO L482 AbstractCegarLoop]: Abstraction has 2414 states and 10283 transitions. [2021-06-12 22:35:48,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:48,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 10283 transitions. [2021-06-12 22:35:48,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:48,102 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:48,102 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:48,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-12 22:35:48,102 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:48,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:48,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1093628820, now seen corresponding path program 4 times [2021-06-12 22:35:48,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:48,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703477067] [2021-06-12 22:35:48,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:48,122 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 22:35:48,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:48,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703477067] [2021-06-12 22:35:48,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703477067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:48,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818591445] [2021-06-12 22:35:48,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:48,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:35:48,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:48,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:35:48,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:48,195 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 22:35:48,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818591445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:48,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:48,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-12 22:35:48,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249825462] [2021-06-12 22:35:48,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 22:35:48,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:48,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 22:35:48,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:35:48,196 INFO L87 Difference]: Start difference. First operand 2414 states and 10283 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:48,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:48,298 INFO L93 Difference]: Finished difference Result 3537 states and 14681 transitions. [2021-06-12 22:35:48,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:35:48,299 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 22:35:48,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:48,305 INFO L225 Difference]: With dead ends: 3537 [2021-06-12 22:35:48,305 INFO L226 Difference]: Without dead ends: 3537 [2021-06-12 22:35:48,305 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:35:48,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-06-12 22:35:48,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2731. [2021-06-12 22:35:48,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 2730 states have (on average 4.247252747252747) internal successors, (11595), 2730 states have internal predecessors, (11595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 11595 transitions. [2021-06-12 22:35:48,351 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 11595 transitions. Word has length 23 [2021-06-12 22:35:48,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:48,351 INFO L482 AbstractCegarLoop]: Abstraction has 2731 states and 11595 transitions. [2021-06-12 22:35:48,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:48,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 11595 transitions. [2021-06-12 22:35:48,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:48,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:48,356 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:48,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 22:35:48,573 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:48,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:48,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1241815956, now seen corresponding path program 5 times [2021-06-12 22:35:48,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:48,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062450185] [2021-06-12 22:35:48,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:48,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:48,591 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 22:35:48,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:48,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062450185] [2021-06-12 22:35:48,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062450185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:48,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476940798] [2021-06-12 22:35:48,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:48,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:35:48,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:48,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:35:48,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:48,676 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 22:35:48,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476940798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:48,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:48,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-12 22:35:48,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954166593] [2021-06-12 22:35:48,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:35:48,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:48,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:35:48,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:35:48,677 INFO L87 Difference]: Start difference. First operand 2731 states and 11595 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 22:35:48,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:48,795 INFO L93 Difference]: Finished difference Result 5435 states and 21973 transitions. [2021-06-12 22:35:48,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:35:48,795 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 22:35:48,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:48,804 INFO L225 Difference]: With dead ends: 5435 [2021-06-12 22:35:48,804 INFO L226 Difference]: Without dead ends: 5435 [2021-06-12 22:35:48,804 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:35:48,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5435 states. [2021-06-12 22:35:48,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5435 to 3753. [2021-06-12 22:35:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 4.30863539445629) internal successors, (16166), 3752 states have internal predecessors, (16166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:48,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 16166 transitions. [2021-06-12 22:35:48,871 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 16166 transitions. Word has length 23 [2021-06-12 22:35:48,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:48,871 INFO L482 AbstractCegarLoop]: Abstraction has 3753 states and 16166 transitions. [2021-06-12 22:35:48,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 22:35:48,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 16166 transitions. [2021-06-12 22:35:48,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 22:35:48,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:48,878 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:49,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 22:35:49,093 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:49,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:49,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1311709520, now seen corresponding path program 6 times [2021-06-12 22:35:49,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:49,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854382259] [2021-06-12 22:35:49,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:49,107 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 22:35:49,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:49,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854382259] [2021-06-12 22:35:49,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854382259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:49,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880504081] [2021-06-12 22:35:49,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:49,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:35:49,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:49,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:35:49,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:49,173 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 22:35:49,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880504081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:49,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:49,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-12 22:35:49,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885888003] [2021-06-12 22:35:49,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:35:49,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:49,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:35:49,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:35:49,174 INFO L87 Difference]: Start difference. First operand 3753 states and 16166 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 22:35:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:49,398 INFO L93 Difference]: Finished difference Result 6635 states and 27289 transitions. [2021-06-12 22:35:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:35:49,399 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 22:35:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:49,414 INFO L225 Difference]: With dead ends: 6635 [2021-06-12 22:35:49,414 INFO L226 Difference]: Without dead ends: 6635 [2021-06-12 22:35:49,414 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:35:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6635 states. [2021-06-12 22:35:49,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6635 to 4003. [2021-06-12 22:35:49,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 4.365817091454272) internal successors, (17472), 4002 states have internal predecessors, (17472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 17472 transitions. [2021-06-12 22:35:49,510 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 17472 transitions. Word has length 23 [2021-06-12 22:35:49,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:49,510 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 17472 transitions. [2021-06-12 22:35:49,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 22:35:49,510 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 17472 transitions. [2021-06-12 22:35:49,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:35:49,518 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:49,518 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:49,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 22:35:49,733 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:49,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:49,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1126765012, now seen corresponding path program 7 times [2021-06-12 22:35:49,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:49,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648352889] [2021-06-12 22:35:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:49,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:49,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648352889] [2021-06-12 22:35:49,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648352889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:49,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66434196] [2021-06-12 22:35:49,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:49,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:35:49,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:49,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66434196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:49,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:49,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-12 22:35:49,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280249807] [2021-06-12 22:35:49,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:35:49,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:49,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:35:49,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:35:49,831 INFO L87 Difference]: Start difference. First operand 4003 states and 17472 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:49,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:49,973 INFO L93 Difference]: Finished difference Result 8080 states and 33388 transitions. [2021-06-12 22:35:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:35:49,973 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:35:49,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:49,990 INFO L225 Difference]: With dead ends: 8080 [2021-06-12 22:35:49,990 INFO L226 Difference]: Without dead ends: 7806 [2021-06-12 22:35:49,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:35:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7806 states. [2021-06-12 22:35:50,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7806 to 5496. [2021-06-12 22:35:50,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5496 states, 5495 states have (on average 4.4049135577798) internal successors, (24205), 5495 states have internal predecessors, (24205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:50,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5496 states to 5496 states and 24205 transitions. [2021-06-12 22:35:50,139 INFO L78 Accepts]: Start accepts. Automaton has 5496 states and 24205 transitions. Word has length 25 [2021-06-12 22:35:50,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:50,139 INFO L482 AbstractCegarLoop]: Abstraction has 5496 states and 24205 transitions. [2021-06-12 22:35:50,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:50,139 INFO L276 IsEmpty]: Start isEmpty. Operand 5496 states and 24205 transitions. [2021-06-12 22:35:50,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:35:50,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:50,149 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:50,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 22:35:50,364 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:50,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:50,364 INFO L82 PathProgramCache]: Analyzing trace with hash -838332880, now seen corresponding path program 4 times [2021-06-12 22:35:50,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:50,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862365510] [2021-06-12 22:35:50,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:50,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:50,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862365510] [2021-06-12 22:35:50,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862365510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:50,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250045067] [2021-06-12 22:35:50,419 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 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 22:35:50,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:35:50,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:50,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:35:50,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:50,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250045067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:50,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:50,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 22:35:50,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770715306] [2021-06-12 22:35:50,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:35:50,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:50,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:35:50,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:35:50,501 INFO L87 Difference]: Start difference. First operand 5496 states and 24205 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 22:35:50,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:50,593 INFO L93 Difference]: Finished difference Result 7686 states and 32613 transitions. [2021-06-12 22:35:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:35:50,593 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 22:35:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:50,609 INFO L225 Difference]: With dead ends: 7686 [2021-06-12 22:35:50,609 INFO L226 Difference]: Without dead ends: 7610 [2021-06-12 22:35:50,609 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:35:50,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7610 states. [2021-06-12 22:35:50,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7610 to 5750. [2021-06-12 22:35:50,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5750 states, 5749 states have (on average 4.412071664637328) internal successors, (25365), 5749 states have internal predecessors, (25365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:50,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5750 states to 5750 states and 25365 transitions. [2021-06-12 22:35:50,715 INFO L78 Accepts]: Start accepts. Automaton has 5750 states and 25365 transitions. Word has length 25 [2021-06-12 22:35:50,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:50,715 INFO L482 AbstractCegarLoop]: Abstraction has 5750 states and 25365 transitions. [2021-06-12 22:35:50,716 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 22:35:50,716 INFO L276 IsEmpty]: Start isEmpty. Operand 5750 states and 25365 transitions. [2021-06-12 22:35:50,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:35:50,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:50,726 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:50,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:50,927 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:50,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:50,927 INFO L82 PathProgramCache]: Analyzing trace with hash 260787888, now seen corresponding path program 1 times [2021-06-12 22:35:50,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:50,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863480718] [2021-06-12 22:35:50,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:50,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:50,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863480718] [2021-06-12 22:35:50,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863480718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:50,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675400880] [2021-06-12 22:35:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:51,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:35:51,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:51,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675400880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:51,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:51,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-12 22:35:51,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111027978] [2021-06-12 22:35:51,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:35:51,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:51,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:35:51,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:35:51,133 INFO L87 Difference]: Start difference. First operand 5750 states and 25365 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:51,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:51,467 INFO L93 Difference]: Finished difference Result 13992 states and 58011 transitions. [2021-06-12 22:35:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:35:51,467 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:35:51,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:51,495 INFO L225 Difference]: With dead ends: 13992 [2021-06-12 22:35:51,496 INFO L226 Difference]: Without dead ends: 13926 [2021-06-12 22:35:51,496 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:35:51,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13926 states. [2021-06-12 22:35:51,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13926 to 7249. [2021-06-12 22:35:51,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 7248 states have (on average 4.467301324503311) internal successors, (32379), 7248 states have internal predecessors, (32379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:51,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 32379 transitions. [2021-06-12 22:35:51,738 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 32379 transitions. Word has length 25 [2021-06-12 22:35:51,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:51,738 INFO L482 AbstractCegarLoop]: Abstraction has 7249 states and 32379 transitions. [2021-06-12 22:35:51,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:51,738 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 32379 transitions. [2021-06-12 22:35:51,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:35:51,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:51,752 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:51,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 22:35:51,952 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:51,953 INFO L82 PathProgramCache]: Analyzing trace with hash 330681452, now seen corresponding path program 2 times [2021-06-12 22:35:51,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:51,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217306995] [2021-06-12 22:35:51,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:51,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:51,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217306995] [2021-06-12 22:35:51,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217306995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:51,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144540240] [2021-06-12 22:35:51,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:51,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:35:51,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:52,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:35:52,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:52,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144540240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:52,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:52,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-12 22:35:52,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343213723] [2021-06-12 22:35:52,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:35:52,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:52,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:35:52,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:35:52,064 INFO L87 Difference]: Start difference. First operand 7249 states and 32379 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:52,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:52,514 INFO L93 Difference]: Finished difference Result 12594 states and 53597 transitions. [2021-06-12 22:35:52,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:35:52,515 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:35:52,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:52,541 INFO L225 Difference]: With dead ends: 12594 [2021-06-12 22:35:52,541 INFO L226 Difference]: Without dead ends: 12594 [2021-06-12 22:35:52,541 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:35:52,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12594 states. [2021-06-12 22:35:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12594 to 8788. [2021-06-12 22:35:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8788 states, 8787 states have (on average 4.496073745305565) internal successors, (39507), 8787 states have internal predecessors, (39507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8788 states to 8788 states and 39507 transitions. [2021-06-12 22:35:52,774 INFO L78 Accepts]: Start accepts. Automaton has 8788 states and 39507 transitions. Word has length 25 [2021-06-12 22:35:52,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:52,774 INFO L482 AbstractCegarLoop]: Abstraction has 8788 states and 39507 transitions. [2021-06-12 22:35:52,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand 8788 states and 39507 transitions. [2021-06-12 22:35:52,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:35:52,789 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:52,789 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:52,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:52,990 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:52,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:52,990 INFO L82 PathProgramCache]: Analyzing trace with hash -7958540, now seen corresponding path program 3 times [2021-06-12 22:35:52,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:52,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852353121] [2021-06-12 22:35:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:53,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:53,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852353121] [2021-06-12 22:35:53,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852353121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:53,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825686909] [2021-06-12 22:35:53,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:53,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:35:53,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:53,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:35:53,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:53,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825686909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:53,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:53,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:35:53,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753599153] [2021-06-12 22:35:53,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:35:53,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:53,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:35:53,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:35:53,153 INFO L87 Difference]: Start difference. First operand 8788 states and 39507 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:53,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:53,744 INFO L93 Difference]: Finished difference Result 29971 states and 129329 transitions. [2021-06-12 22:35:53,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:35:53,744 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:35:53,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:53,817 INFO L225 Difference]: With dead ends: 29971 [2021-06-12 22:35:53,817 INFO L226 Difference]: Without dead ends: 29848 [2021-06-12 22:35:53,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 235.6ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:35:53,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29848 states. [2021-06-12 22:35:54,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29848 to 14478. [2021-06-12 22:35:54,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14478 states, 14477 states have (on average 4.563859915728397) internal successors, (66071), 14477 states have internal predecessors, (66071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14478 states to 14478 states and 66071 transitions. [2021-06-12 22:35:54,346 INFO L78 Accepts]: Start accepts. Automaton has 14478 states and 66071 transitions. Word has length 25 [2021-06-12 22:35:54,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:54,346 INFO L482 AbstractCegarLoop]: Abstraction has 14478 states and 66071 transitions. [2021-06-12 22:35:54,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 14478 states and 66071 transitions. [2021-06-12 22:35:54,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:35:54,375 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:54,375 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:54,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 22:35:54,577 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:54,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:54,578 INFO L82 PathProgramCache]: Analyzing trace with hash 209069450, now seen corresponding path program 4 times [2021-06-12 22:35:54,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:54,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320561399] [2021-06-12 22:35:54,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:54,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:54,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320561399] [2021-06-12 22:35:54,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320561399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:54,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169009128] [2021-06-12 22:35:54,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:54,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:35:54,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:54,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:35:54,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:54,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169009128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:54,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:54,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-06-12 22:35:54,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610111027] [2021-06-12 22:35:54,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:35:54,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:54,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:35:54,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:35:54,730 INFO L87 Difference]: Start difference. First operand 14478 states and 66071 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:55,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:55,304 INFO L93 Difference]: Finished difference Result 31001 states and 134975 transitions. [2021-06-12 22:35:55,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:35:55,304 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:35:55,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:55,380 INFO L225 Difference]: With dead ends: 31001 [2021-06-12 22:35:55,380 INFO L226 Difference]: Without dead ends: 30851 [2021-06-12 22:35:55,381 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:35:55,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30851 states. [2021-06-12 22:35:55,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30851 to 21508. [2021-06-12 22:35:55,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21508 states, 21507 states have (on average 4.549309527130702) internal successors, (97842), 21507 states have internal predecessors, (97842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:55,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21508 states to 21508 states and 97842 transitions. [2021-06-12 22:35:55,990 INFO L78 Accepts]: Start accepts. Automaton has 21508 states and 97842 transitions. Word has length 25 [2021-06-12 22:35:55,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:55,990 INFO L482 AbstractCegarLoop]: Abstraction has 21508 states and 97842 transitions. [2021-06-12 22:35:55,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:55,990 INFO L276 IsEmpty]: Start isEmpty. Operand 21508 states and 97842 transitions. [2021-06-12 22:35:56,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:35:56,037 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:56,037 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:56,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:56,249 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:56,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:56,249 INFO L82 PathProgramCache]: Analyzing trace with hash -856581012, now seen corresponding path program 5 times [2021-06-12 22:35:56,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:56,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768057925] [2021-06-12 22:35:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:56,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:56,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768057925] [2021-06-12 22:35:56,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768057925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:56,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003537253] [2021-06-12 22:35:56,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:56,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:35:56,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:56,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 22:35:56,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:56,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003537253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:56,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:56,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:35:56,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246553058] [2021-06-12 22:35:56,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:35:56,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:56,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:35:56,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:35:56,431 INFO L87 Difference]: Start difference. First operand 21508 states and 97842 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 22:35:56,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:56,822 INFO L93 Difference]: Finished difference Result 27651 states and 123756 transitions. [2021-06-12 22:35:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:35:56,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 22:35:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:56,986 INFO L225 Difference]: With dead ends: 27651 [2021-06-12 22:35:56,986 INFO L226 Difference]: Without dead ends: 27523 [2021-06-12 22:35:56,986 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:35:57,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27523 states. [2021-06-12 22:35:57,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27523 to 21550. [2021-06-12 22:35:57,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21550 states, 21549 states have (on average 4.550559190681702) internal successors, (98060), 21549 states have internal predecessors, (98060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21550 states to 21550 states and 98060 transitions. [2021-06-12 22:35:57,496 INFO L78 Accepts]: Start accepts. Automaton has 21550 states and 98060 transitions. Word has length 25 [2021-06-12 22:35:57,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:57,496 INFO L482 AbstractCegarLoop]: Abstraction has 21550 states and 98060 transitions. [2021-06-12 22:35:57,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 22:35:57,497 INFO L276 IsEmpty]: Start isEmpty. Operand 21550 states and 98060 transitions. [2021-06-12 22:35:57,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:35:57,542 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:57,542 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:57,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-12 22:35:57,742 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:57,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:57,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1236735550, now seen corresponding path program 6 times [2021-06-12 22:35:57,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:57,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864859151] [2021-06-12 22:35:57,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:57,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:57,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864859151] [2021-06-12 22:35:57,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864859151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:57,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214068594] [2021-06-12 22:35:57,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:57,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:35:57,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:35:57,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 22:35:57,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:57,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214068594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:57,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:57,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:35:57,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68878679] [2021-06-12 22:35:57,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:35:57,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:57,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:35:57,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:35:57,934 INFO L87 Difference]: Start difference. First operand 21550 states and 98060 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 22:35:58,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:58,299 INFO L93 Difference]: Finished difference Result 22500 states and 101338 transitions. [2021-06-12 22:35:58,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:35:58,299 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 25 [2021-06-12 22:35:58,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:35:58,351 INFO L225 Difference]: With dead ends: 22500 [2021-06-12 22:35:58,351 INFO L226 Difference]: Without dead ends: 22316 [2021-06-12 22:35:58,351 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:35:58,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22316 states. [2021-06-12 22:35:58,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22316 to 21544. [2021-06-12 22:35:58,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21544 states, 21543 states have (on average 4.5494592210926985) internal successors, (98009), 21543 states have internal predecessors, (98009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:58,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21544 states to 21544 states and 98009 transitions. [2021-06-12 22:35:58,908 INFO L78 Accepts]: Start accepts. Automaton has 21544 states and 98009 transitions. Word has length 25 [2021-06-12 22:35:58,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:35:58,908 INFO L482 AbstractCegarLoop]: Abstraction has 21544 states and 98009 transitions. [2021-06-12 22:35:58,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 22:35:58,908 INFO L276 IsEmpty]: Start isEmpty. Operand 21544 states and 98009 transitions. [2021-06-12 22:35:58,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:35:58,946 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:35:58,946 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:35:59,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 22:35:59,149 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:35:59,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:35:59,149 INFO L82 PathProgramCache]: Analyzing trace with hash -556155216, now seen corresponding path program 7 times [2021-06-12 22:35:59,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:35:59,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328242616] [2021-06-12 22:35:59,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:35:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:59,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:35:59,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328242616] [2021-06-12 22:35:59,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328242616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:59,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736671319] [2021-06-12 22:35:59,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:35:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:35:59,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:35:59,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:35:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:35:59,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736671319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:35:59,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:35:59,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-06-12 22:35:59,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363862966] [2021-06-12 22:35:59,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:35:59,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:35:59,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:35:59,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:35:59,287 INFO L87 Difference]: Start difference. First operand 21544 states and 98009 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:35:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:35:59,925 INFO L93 Difference]: Finished difference Result 37571 states and 165395 transitions. [2021-06-12 22:35:59,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:35:59,926 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:35:59,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:36:00,037 INFO L225 Difference]: With dead ends: 37571 [2021-06-12 22:36:00,037 INFO L226 Difference]: Without dead ends: 37406 [2021-06-12 22:36:00,037 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:36:00,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37406 states. [2021-06-12 22:36:00,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37406 to 25632. [2021-06-12 22:36:00,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25632 states, 25631 states have (on average 4.59131520424486) internal successors, (117680), 25631 states have internal predecessors, (117680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:00,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25632 states to 25632 states and 117680 transitions. [2021-06-12 22:36:00,901 INFO L78 Accepts]: Start accepts. Automaton has 25632 states and 117680 transitions. Word has length 25 [2021-06-12 22:36:00,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:36:00,901 INFO L482 AbstractCegarLoop]: Abstraction has 25632 states and 117680 transitions. [2021-06-12 22:36:00,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:00,902 INFO L276 IsEmpty]: Start isEmpty. Operand 25632 states and 117680 transitions. [2021-06-12 22:36:00,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:36:00,955 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:36:00,955 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:36:01,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 22:36:01,155 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:36:01,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:36:01,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1592641320, now seen corresponding path program 8 times [2021-06-12 22:36:01,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:36:01,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341375932] [2021-06-12 22:36:01,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:36:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:36:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:01,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:36:01,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341375932] [2021-06-12 22:36:01,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341375932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:01,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82540546] [2021-06-12 22:36:01,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:36:01,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:36:01,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:36:01,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 22:36:01,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:36:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:01,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82540546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:01,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:36:01,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:36:01,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675890406] [2021-06-12 22:36:01,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:36:01,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:36:01,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:36:01,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:36:01,300 INFO L87 Difference]: Start difference. First operand 25632 states and 117680 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:01,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:36:01,694 INFO L93 Difference]: Finished difference Result 26558 states and 120874 transitions. [2021-06-12 22:36:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:36:01,694 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:36:01,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:36:01,773 INFO L225 Difference]: With dead ends: 26558 [2021-06-12 22:36:01,773 INFO L226 Difference]: Without dead ends: 26388 [2021-06-12 22:36:01,773 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:36:01,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26388 states. [2021-06-12 22:36:02,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26388 to 25652. [2021-06-12 22:36:02,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25652 states, 25651 states have (on average 4.589294764336673) internal successors, (117720), 25651 states have internal predecessors, (117720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25652 states to 25652 states and 117720 transitions. [2021-06-12 22:36:02,350 INFO L78 Accepts]: Start accepts. Automaton has 25652 states and 117720 transitions. Word has length 25 [2021-06-12 22:36:02,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:36:02,350 INFO L482 AbstractCegarLoop]: Abstraction has 25652 states and 117720 transitions. [2021-06-12 22:36:02,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:02,350 INFO L276 IsEmpty]: Start isEmpty. Operand 25652 states and 117720 transitions. [2021-06-12 22:36:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:36:02,404 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:36:02,404 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:36:02,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:36:02,604 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:36:02,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:36:02,605 INFO L82 PathProgramCache]: Analyzing trace with hash 256048560, now seen corresponding path program 1 times [2021-06-12 22:36:02,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:36:02,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009056749] [2021-06-12 22:36:02,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:36:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:36:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:02,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:36:02,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009056749] [2021-06-12 22:36:02,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009056749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:02,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949826651] [2021-06-12 22:36:02,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:36:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:36:02,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:36:02,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:36:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:02,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949826651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:02,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:36:02,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-12 22:36:02,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945244229] [2021-06-12 22:36:02,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:36:02,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:36:02,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:36:02,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:36:02,711 INFO L87 Difference]: Start difference. First operand 25652 states and 117720 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:03,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:36:03,163 INFO L93 Difference]: Finished difference Result 28634 states and 129447 transitions. [2021-06-12 22:36:03,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:36:03,164 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:36:03,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:36:03,235 INFO L225 Difference]: With dead ends: 28634 [2021-06-12 22:36:03,235 INFO L226 Difference]: Without dead ends: 28616 [2021-06-12 22:36:03,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:36:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28616 states. [2021-06-12 22:36:03,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28616 to 26082. [2021-06-12 22:36:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26082 states, 26081 states have (on average 4.586288869291821) internal successors, (119615), 26081 states have internal predecessors, (119615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26082 states to 26082 states and 119615 transitions. [2021-06-12 22:36:03,819 INFO L78 Accepts]: Start accepts. Automaton has 26082 states and 119615 transitions. Word has length 25 [2021-06-12 22:36:03,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:36:03,819 INFO L482 AbstractCegarLoop]: Abstraction has 26082 states and 119615 transitions. [2021-06-12 22:36:03,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 26082 states and 119615 transitions. [2021-06-12 22:36:03,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:36:03,866 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:36:03,866 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:36:04,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 22:36:04,066 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:36:04,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:36:04,066 INFO L82 PathProgramCache]: Analyzing trace with hash 706782640, now seen corresponding path program 2 times [2021-06-12 22:36:04,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:36:04,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755523789] [2021-06-12 22:36:04,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:36:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:36:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:04,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:36:04,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755523789] [2021-06-12 22:36:04,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755523789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:04,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902051021] [2021-06-12 22:36:04,088 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:36:04,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:36:04,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:36:04,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:36:04,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:36:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:04,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902051021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:04,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:36:04,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-12 22:36:04,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113749515] [2021-06-12 22:36:04,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:36:04,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:36:04,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:36:04,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:36:04,326 INFO L87 Difference]: Start difference. First operand 26082 states and 119615 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 22:36:04,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:36:04,620 INFO L93 Difference]: Finished difference Result 30645 states and 137873 transitions. [2021-06-12 22:36:04,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:36:04,620 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 25 [2021-06-12 22:36:04,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:36:04,696 INFO L225 Difference]: With dead ends: 30645 [2021-06-12 22:36:04,696 INFO L226 Difference]: Without dead ends: 30645 [2021-06-12 22:36:04,696 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:36:04,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30645 states. [2021-06-12 22:36:05,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30645 to 25908. [2021-06-12 22:36:05,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25908 states, 25907 states have (on average 4.584243640714865) internal successors, (118764), 25907 states have internal predecessors, (118764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:05,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25908 states to 25908 states and 118764 transitions. [2021-06-12 22:36:05,450 INFO L78 Accepts]: Start accepts. Automaton has 25908 states and 118764 transitions. Word has length 25 [2021-06-12 22:36:05,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:36:05,450 INFO L482 AbstractCegarLoop]: Abstraction has 25908 states and 118764 transitions. [2021-06-12 22:36:05,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 22:36:05,450 INFO L276 IsEmpty]: Start isEmpty. Operand 25908 states and 118764 transitions. [2021-06-12 22:36:05,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:36:05,500 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:36:05,500 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:36:05,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 22:36:05,709 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:36:05,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:36:05,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1083621228, now seen corresponding path program 3 times [2021-06-12 22:36:05,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:36:05,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085496475] [2021-06-12 22:36:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:36:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:36:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:05,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:36:05,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085496475] [2021-06-12 22:36:05,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085496475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:05,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524294385] [2021-06-12 22:36:05,733 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 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 22:36:05,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:36:05,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:36:05,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:36:05,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:36:05,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:05,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524294385] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:36:05,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 22:36:05,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-06-12 22:36:05,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331096483] [2021-06-12 22:36:05,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 22:36:05,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:36:05,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 22:36:05,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:36:05,810 INFO L87 Difference]: Start difference. First operand 25908 states and 118764 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 22:36:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:36:06,237 INFO L93 Difference]: Finished difference Result 33932 states and 151310 transitions. [2021-06-12 22:36:06,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:36:06,238 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 22:36:06,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:36:06,340 INFO L225 Difference]: With dead ends: 33932 [2021-06-12 22:36:06,340 INFO L226 Difference]: Without dead ends: 33850 [2021-06-12 22:36:06,340 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:36:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33850 states. [2021-06-12 22:36:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33850 to 27223. [2021-06-12 22:36:06,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27223 states, 27222 states have (on average 4.581074131217398) internal successors, (124706), 27222 states have internal predecessors, (124706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:06,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27223 states to 27223 states and 124706 transitions. [2021-06-12 22:36:06,955 INFO L78 Accepts]: Start accepts. Automaton has 27223 states and 124706 transitions. Word has length 25 [2021-06-12 22:36:06,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:36:06,955 INFO L482 AbstractCegarLoop]: Abstraction has 27223 states and 124706 transitions. [2021-06-12 22:36:06,955 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 22:36:06,955 INFO L276 IsEmpty]: Start isEmpty. Operand 27223 states and 124706 transitions. [2021-06-12 22:36:07,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:36:07,005 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:36:07,005 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:36:07,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:36:07,206 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:36:07,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:36:07,206 INFO L82 PathProgramCache]: Analyzing trace with hash 137417170, now seen corresponding path program 5 times [2021-06-12 22:36:07,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:36:07,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329165771] [2021-06-12 22:36:07,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:36:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:36:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:07,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:36:07,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329165771] [2021-06-12 22:36:07,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329165771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:07,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619289794] [2021-06-12 22:36:07,251 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 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 22:36:07,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:36:07,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:36:07,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:36:07,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:36:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:07,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619289794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:07,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:36:07,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 22:36:07,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121832312] [2021-06-12 22:36:07,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:36:07,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:36:07,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:36:07,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:36:07,316 INFO L87 Difference]: Start difference. First operand 27223 states and 124706 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 22:36:07,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:36:07,735 INFO L93 Difference]: Finished difference Result 29638 states and 134233 transitions. [2021-06-12 22:36:07,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:36:07,736 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 22:36:07,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:36:07,820 INFO L225 Difference]: With dead ends: 29638 [2021-06-12 22:36:07,820 INFO L226 Difference]: Without dead ends: 29562 [2021-06-12 22:36:07,820 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:36:07,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29562 states. [2021-06-12 22:36:08,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29562 to 27293. [2021-06-12 22:36:08,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27293 states, 27292 states have (on average 4.584017294445259) internal successors, (125107), 27292 states have internal predecessors, (125107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:08,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27293 states to 27293 states and 125107 transitions. [2021-06-12 22:36:08,515 INFO L78 Accepts]: Start accepts. Automaton has 27293 states and 125107 transitions. Word has length 25 [2021-06-12 22:36:08,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:36:08,515 INFO L482 AbstractCegarLoop]: Abstraction has 27293 states and 125107 transitions. [2021-06-12 22:36:08,515 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 22:36:08,515 INFO L276 IsEmpty]: Start isEmpty. Operand 27293 states and 125107 transitions. [2021-06-12 22:36:08,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:36:08,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:36:08,572 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:36:08,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-12 22:36:08,773 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:36:08,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:36:08,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1704182322, now seen corresponding path program 6 times [2021-06-12 22:36:08,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:36:08,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136963310] [2021-06-12 22:36:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:36:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:36:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:08,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:36:08,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136963310] [2021-06-12 22:36:08,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136963310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:08,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801157264] [2021-06-12 22:36:08,832 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:36:08,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:36:08,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:36:08,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:36:08,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:36:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:08,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801157264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:08,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:36:08,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 22:36:08,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812545967] [2021-06-12 22:36:08,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:36:08,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:36:08,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:36:08,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:36:08,915 INFO L87 Difference]: Start difference. First operand 27293 states and 125107 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 22:36:09,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:36:09,304 INFO L93 Difference]: Finished difference Result 29552 states and 134049 transitions. [2021-06-12 22:36:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:36:09,304 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 22:36:09,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:36:09,379 INFO L225 Difference]: With dead ends: 29552 [2021-06-12 22:36:09,379 INFO L226 Difference]: Without dead ends: 29476 [2021-06-12 22:36:09,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:36:09,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29476 states. [2021-06-12 22:36:09,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29476 to 27436. [2021-06-12 22:36:09,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27436 states, 27435 states have (on average 4.586477127756515) internal successors, (125830), 27435 states have internal predecessors, (125830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:10,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27436 states to 27436 states and 125830 transitions. [2021-06-12 22:36:10,005 INFO L78 Accepts]: Start accepts. Automaton has 27436 states and 125830 transitions. Word has length 25 [2021-06-12 22:36:10,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:36:10,005 INFO L482 AbstractCegarLoop]: Abstraction has 27436 states and 125830 transitions. [2021-06-12 22:36:10,005 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 22:36:10,005 INFO L276 IsEmpty]: Start isEmpty. Operand 27436 states and 125830 transitions. [2021-06-12 22:36:10,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:36:10,206 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:36:10,206 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:36:10,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:36:10,407 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:36:10,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:36:10,407 INFO L82 PathProgramCache]: Analyzing trace with hash -605061554, now seen corresponding path program 9 times [2021-06-12 22:36:10,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:36:10,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171802237] [2021-06-12 22:36:10,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:36:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:36:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:10,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:36:10,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171802237] [2021-06-12 22:36:10,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171802237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:10,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356737835] [2021-06-12 22:36:10,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:36:10,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:36:10,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:36:10,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:36:10,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:36:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:10,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356737835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:10,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:36:10,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-12 22:36:10,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039779210] [2021-06-12 22:36:10,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:36:10,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:36:10,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:36:10,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:36:10,536 INFO L87 Difference]: Start difference. First operand 27436 states and 125830 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:36:11,247 INFO L93 Difference]: Finished difference Result 58244 states and 263402 transitions. [2021-06-12 22:36:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:36:11,247 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:36:11,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:36:11,426 INFO L225 Difference]: With dead ends: 58244 [2021-06-12 22:36:11,426 INFO L226 Difference]: Without dead ends: 58083 [2021-06-12 22:36:11,426 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:36:11,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58083 states. [2021-06-12 22:36:12,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58083 to 50808. [2021-06-12 22:36:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50808 states, 50807 states have (on average 4.5649615210502485) internal successors, (231932), 50807 states have internal predecessors, (231932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50808 states to 50808 states and 231932 transitions. [2021-06-12 22:36:12,692 INFO L78 Accepts]: Start accepts. Automaton has 50808 states and 231932 transitions. Word has length 25 [2021-06-12 22:36:12,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:36:12,692 INFO L482 AbstractCegarLoop]: Abstraction has 50808 states and 231932 transitions. [2021-06-12 22:36:12,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:12,692 INFO L276 IsEmpty]: Start isEmpty. Operand 50808 states and 231932 transitions. [2021-06-12 22:36:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:36:13,014 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:36:13,014 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:36:13,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-12 22:36:13,229 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:36:13,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:36:13,229 INFO L82 PathProgramCache]: Analyzing trace with hash -535167990, now seen corresponding path program 10 times [2021-06-12 22:36:13,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:36:13,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939462841] [2021-06-12 22:36:13,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:36:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:36:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:13,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:36:13,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939462841] [2021-06-12 22:36:13,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939462841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:13,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851047376] [2021-06-12 22:36:13,252 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:36:13,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:36:13,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:36:13,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:36:13,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:36:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:13,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851047376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:13,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:36:13,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-12 22:36:13,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582482834] [2021-06-12 22:36:13,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:36:13,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:36:13,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:36:13,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:36:13,363 INFO L87 Difference]: Start difference. First operand 50808 states and 231932 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:14,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:36:14,341 INFO L93 Difference]: Finished difference Result 83779 states and 378490 transitions. [2021-06-12 22:36:14,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:36:14,341 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:36:14,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:36:14,603 INFO L225 Difference]: With dead ends: 83779 [2021-06-12 22:36:14,604 INFO L226 Difference]: Without dead ends: 83779 [2021-06-12 22:36:14,604 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:36:14,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83779 states. [2021-06-12 22:36:16,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83779 to 72653. [2021-06-12 22:36:16,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72653 states, 72652 states have (on average 4.592110334195893) internal successors, (333626), 72652 states have internal predecessors, (333626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72653 states to 72653 states and 333626 transitions. [2021-06-12 22:36:16,831 INFO L78 Accepts]: Start accepts. Automaton has 72653 states and 333626 transitions. Word has length 25 [2021-06-12 22:36:16,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:36:16,831 INFO L482 AbstractCegarLoop]: Abstraction has 72653 states and 333626 transitions. [2021-06-12 22:36:16,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:16,831 INFO L276 IsEmpty]: Start isEmpty. Operand 72653 states and 333626 transitions. [2021-06-12 22:36:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:36:16,978 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:36:16,978 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:36:17,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-12 22:36:17,180 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:36:17,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:36:17,180 INFO L82 PathProgramCache]: Analyzing trace with hash -2017642098, now seen corresponding path program 7 times [2021-06-12 22:36:17,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:36:17,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870069878] [2021-06-12 22:36:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:36:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:36:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:17,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:36:17,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870069878] [2021-06-12 22:36:17,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870069878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:17,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196611621] [2021-06-12 22:36:17,259 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 22:36:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:36:17,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:36:17,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:36:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:17,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196611621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:17,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:36:17,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 22:36:17,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964283342] [2021-06-12 22:36:17,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:36:17,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:36:17,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:36:17,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:36:17,333 INFO L87 Difference]: Start difference. First operand 72653 states and 333626 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 22:36:18,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:36:18,074 INFO L93 Difference]: Finished difference Result 74099 states and 339316 transitions. [2021-06-12 22:36:18,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:36:18,075 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 22:36:18,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:36:18,498 INFO L225 Difference]: With dead ends: 74099 [2021-06-12 22:36:18,498 INFO L226 Difference]: Without dead ends: 74023 [2021-06-12 22:36:18,499 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:36:18,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74023 states. [2021-06-12 22:36:19,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74023 to 72711. [2021-06-12 22:36:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72711 states, 72710 states have (on average 4.592366937147572) internal successors, (333911), 72710 states have internal predecessors, (333911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:20,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72711 states to 72711 states and 333911 transitions. [2021-06-12 22:36:20,479 INFO L78 Accepts]: Start accepts. Automaton has 72711 states and 333911 transitions. Word has length 25 [2021-06-12 22:36:20,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:36:20,479 INFO L482 AbstractCegarLoop]: Abstraction has 72711 states and 333911 transitions. [2021-06-12 22:36:20,479 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 22:36:20,479 INFO L276 IsEmpty]: Start isEmpty. Operand 72711 states and 333911 transitions. [2021-06-12 22:36:20,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:36:20,635 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:36:20,635 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:36:20,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-12 22:36:20,835 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:36:20,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:36:20,836 INFO L82 PathProgramCache]: Analyzing trace with hash -660900726, now seen corresponding path program 8 times [2021-06-12 22:36:20,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:36:20,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580871170] [2021-06-12 22:36:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:36:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:36:20,898 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 22:36:20,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:36:20,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580871170] [2021-06-12 22:36:20,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580871170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:20,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811691823] [2021-06-12 22:36:20,898 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 22:36:20,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:36:20,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:36:20,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 22:36:20,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:36:20,964 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 22:36:20,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811691823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:20,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:36:20,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 22:36:20,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837904718] [2021-06-12 22:36:20,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:36:20,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:36:20,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:36:20,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:36:20,965 INFO L87 Difference]: Start difference. First operand 72711 states and 333911 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 22:36:21,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:36:21,720 INFO L93 Difference]: Finished difference Result 73874 states and 338535 transitions. [2021-06-12 22:36:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:36:21,720 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 22:36:21,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:36:21,954 INFO L225 Difference]: With dead ends: 73874 [2021-06-12 22:36:21,954 INFO L226 Difference]: Without dead ends: 73798 [2021-06-12 22:36:21,954 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:36:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73798 states. [2021-06-12 22:36:23,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73798 to 72769. [2021-06-12 22:36:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72769 states, 72768 states have (on average 4.592650615655233) internal successors, (334198), 72768 states have internal predecessors, (334198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72769 states to 72769 states and 334198 transitions. [2021-06-12 22:36:24,024 INFO L78 Accepts]: Start accepts. Automaton has 72769 states and 334198 transitions. Word has length 25 [2021-06-12 22:36:24,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:36:24,025 INFO L482 AbstractCegarLoop]: Abstraction has 72769 states and 334198 transitions. [2021-06-12 22:36:24,025 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 22:36:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 72769 states and 334198 transitions. [2021-06-12 22:36:24,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:36:24,441 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:36:24,441 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:36:24,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 22:36:24,641 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:36:24,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:36:24,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2072982634, now seen corresponding path program 11 times [2021-06-12 22:36:24,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:36:24,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035562007] [2021-06-12 22:36:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:36:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:36:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:24,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:36:24,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035562007] [2021-06-12 22:36:24,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035562007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:24,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973723581] [2021-06-12 22:36:24,668 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 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 22:36:24,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:36:24,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:36:24,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:36:24,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:36:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:24,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973723581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:24,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:36:24,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 22:36:24,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771466057] [2021-06-12 22:36:24,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:36:24,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:36:24,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:36:24,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:36:24,759 INFO L87 Difference]: Start difference. First operand 72769 states and 334198 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 22:36:25,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:36:25,758 INFO L93 Difference]: Finished difference Result 113780 states and 518908 transitions. [2021-06-12 22:36:25,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:36:25,758 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 25 [2021-06-12 22:36:25,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:36:26,145 INFO L225 Difference]: With dead ends: 113780 [2021-06-12 22:36:26,146 INFO L226 Difference]: Without dead ends: 113660 [2021-06-12 22:36:26,146 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:36:26,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113660 states. [2021-06-12 22:36:28,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113660 to 97354. [2021-06-12 22:36:28,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97354 states, 97353 states have (on average 4.601532567049809) internal successors, (447973), 97353 states have internal predecessors, (447973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97354 states to 97354 states and 447973 transitions. [2021-06-12 22:36:29,114 INFO L78 Accepts]: Start accepts. Automaton has 97354 states and 447973 transitions. Word has length 25 [2021-06-12 22:36:29,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:36:29,114 INFO L482 AbstractCegarLoop]: Abstraction has 97354 states and 447973 transitions. [2021-06-12 22:36:29,114 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 22:36:29,114 INFO L276 IsEmpty]: Start isEmpty. Operand 97354 states and 447973 transitions. [2021-06-12 22:36:29,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:36:29,319 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:36:29,320 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:36:29,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:36:29,521 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:36:29,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:36:29,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1816187858, now seen corresponding path program 12 times [2021-06-12 22:36:29,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:36:29,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578450929] [2021-06-12 22:36:29,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:36:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:36:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:29,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:36:29,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578450929] [2021-06-12 22:36:29,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578450929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:29,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643458956] [2021-06-12 22:36:29,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:36:29,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:36:29,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:36:29,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:36:29,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:36:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:29,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643458956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:29,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:36:29,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:36:29,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591917106] [2021-06-12 22:36:29,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:36:29,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:36:29,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:36:29,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:36:29,669 INFO L87 Difference]: Start difference. First operand 97354 states and 447973 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:36:31,728 INFO L93 Difference]: Finished difference Result 199161 states and 905866 transitions. [2021-06-12 22:36:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:36:31,728 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:36:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:36:32,490 INFO L225 Difference]: With dead ends: 199161 [2021-06-12 22:36:32,490 INFO L226 Difference]: Without dead ends: 199068 [2021-06-12 22:36:32,490 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:36:32,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199068 states. [2021-06-12 22:36:36,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199068 to 126471. [2021-06-12 22:36:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126471 states, 126470 states have (on average 4.598568830552701) internal successors, (581581), 126470 states have internal predecessors, (581581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126471 states to 126471 states and 581581 transitions. [2021-06-12 22:36:37,321 INFO L78 Accepts]: Start accepts. Automaton has 126471 states and 581581 transitions. Word has length 25 [2021-06-12 22:36:37,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:36:37,321 INFO L482 AbstractCegarLoop]: Abstraction has 126471 states and 581581 transitions. [2021-06-12 22:36:37,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:37,321 INFO L276 IsEmpty]: Start isEmpty. Operand 126471 states and 581581 transitions. [2021-06-12 22:36:37,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:36:37,871 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:36:37,871 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:36:38,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 22:36:38,072 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:36:38,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:36:38,072 INFO L82 PathProgramCache]: Analyzing trace with hash 193179122, now seen corresponding path program 13 times [2021-06-12 22:36:38,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:36:38,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210636664] [2021-06-12 22:36:38,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:36:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:36:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:38,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:36:38,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210636664] [2021-06-12 22:36:38,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210636664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:38,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239963779] [2021-06-12 22:36:38,113 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 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 22:36:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:36:38,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:36:38,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:36:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:38,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239963779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:38,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:36:38,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:36:38,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276251459] [2021-06-12 22:36:38,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:36:38,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:36:38,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:36:38,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:36:38,219 INFO L87 Difference]: Start difference. First operand 126471 states and 581581 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:39,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:36:39,956 INFO L93 Difference]: Finished difference Result 206475 states and 937233 transitions. [2021-06-12 22:36:39,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:36:39,957 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:36:39,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:36:41,028 INFO L225 Difference]: With dead ends: 206475 [2021-06-12 22:36:41,028 INFO L226 Difference]: Without dead ends: 206475 [2021-06-12 22:36:41,028 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:36:41,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206475 states. [2021-06-12 22:36:44,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206475 to 146245. [2021-06-12 22:36:45,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146245 states, 146244 states have (on average 4.6125037608380515) internal successors, (674551), 146244 states have internal predecessors, (674551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146245 states to 146245 states and 674551 transitions. [2021-06-12 22:36:46,024 INFO L78 Accepts]: Start accepts. Automaton has 146245 states and 674551 transitions. Word has length 25 [2021-06-12 22:36:46,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:36:46,024 INFO L482 AbstractCegarLoop]: Abstraction has 146245 states and 674551 transitions. [2021-06-12 22:36:46,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:46,024 INFO L276 IsEmpty]: Start isEmpty. Operand 146245 states and 674551 transitions. [2021-06-12 22:36:46,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:36:46,340 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:36:46,340 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:36:46,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:36:46,540 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:36:46,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:36:46,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2033215848, now seen corresponding path program 14 times [2021-06-12 22:36:46,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:36:46,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88752873] [2021-06-12 22:36:46,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:36:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:36:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:46,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:36:46,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88752873] [2021-06-12 22:36:46,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88752873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:46,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917924226] [2021-06-12 22:36:46,576 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 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 22:36:46,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:36:46,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:36:46,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:36:46,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:36:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:47,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917924226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:47,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:36:47,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-06-12 22:36:47,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062136682] [2021-06-12 22:36:47,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:36:47,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:36:47,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:36:47,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:36:47,036 INFO L87 Difference]: Start difference. First operand 146245 states and 674551 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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 22:36:48,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:36:48,727 INFO L93 Difference]: Finished difference Result 158888 states and 723911 transitions. [2021-06-12 22:36:48,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:36:48,727 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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 25 [2021-06-12 22:36:48,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:36:49,616 INFO L225 Difference]: With dead ends: 158888 [2021-06-12 22:36:49,616 INFO L226 Difference]: Without dead ends: 158813 [2021-06-12 22:36:49,616 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 464.7ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:36:50,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158813 states. [2021-06-12 22:36:53,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158813 to 150237. [2021-06-12 22:36:53,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150237 states, 150236 states have (on average 4.599729758513273) internal successors, (691045), 150236 states have internal predecessors, (691045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:36:54,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150237 states to 150237 states and 691045 transitions. [2021-06-12 22:36:54,339 INFO L78 Accepts]: Start accepts. Automaton has 150237 states and 691045 transitions. Word has length 25 [2021-06-12 22:36:54,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:36:54,339 INFO L482 AbstractCegarLoop]: Abstraction has 150237 states and 691045 transitions. [2021-06-12 22:36:54,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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 22:36:54,339 INFO L276 IsEmpty]: Start isEmpty. Operand 150237 states and 691045 transitions. [2021-06-12 22:36:54,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:36:54,982 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:36:54,982 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:36:55,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:36:55,182 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:36:55,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:36:55,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1990562746, now seen corresponding path program 15 times [2021-06-12 22:36:55,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:36:55,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134388012] [2021-06-12 22:36:55,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:36:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:36:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:55,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:36:55,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134388012] [2021-06-12 22:36:55,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134388012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:55,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297629304] [2021-06-12 22:36:55,228 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:36:55,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:36:55,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:36:55,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:36:55,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:36:55,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:36:55,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297629304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:36:55,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:36:55,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:36:55,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132545781] [2021-06-12 22:36:55,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:36:55,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:36:55,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:36:55,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:36:55,357 INFO L87 Difference]: Start difference. First operand 150237 states and 691045 transitions. Second operand has 15 states, 15 states have (on average 2.6) 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 22:36:57,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:36:57,812 INFO L93 Difference]: Finished difference Result 274279 states and 1232729 transitions. [2021-06-12 22:36:57,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:36:57,813 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 25 [2021-06-12 22:36:57,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:36:59,295 INFO L225 Difference]: With dead ends: 274279 [2021-06-12 22:36:59,295 INFO L226 Difference]: Without dead ends: 274261 [2021-06-12 22:36:59,296 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 240.6ms TimeCoverageRelationStatistics Valid=256, Invalid=446, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:36:59,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274261 states. [2021-06-12 22:37:03,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274261 to 150288. [2021-06-12 22:37:03,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150288 states, 150287 states have (on average 4.600091824309488) internal successors, (691334), 150287 states have internal predecessors, (691334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:37:04,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150288 states to 150288 states and 691334 transitions. [2021-06-12 22:37:04,730 INFO L78 Accepts]: Start accepts. Automaton has 150288 states and 691334 transitions. Word has length 25 [2021-06-12 22:37:04,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:37:04,730 INFO L482 AbstractCegarLoop]: Abstraction has 150288 states and 691334 transitions. [2021-06-12 22:37:04,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) 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 22:37:04,730 INFO L276 IsEmpty]: Start isEmpty. Operand 150288 states and 691334 transitions. [2021-06-12 22:37:05,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:37:05,041 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:37:05,041 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:37:05,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 22:37:05,241 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:37:05,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:37:05,242 INFO L82 PathProgramCache]: Analyzing trace with hash 681395814, now seen corresponding path program 16 times [2021-06-12 22:37:05,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:37:05,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751400677] [2021-06-12 22:37:05,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:37:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:37:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:37:05,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:37:05,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751400677] [2021-06-12 22:37:05,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751400677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:37:05,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55456304] [2021-06-12 22:37:05,652 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:37:05,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:37:05,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:37:05,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:37:05,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:37:05,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:37:05,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55456304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:37:05,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:37:05,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:37:05,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596194763] [2021-06-12 22:37:05,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:37:05,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:37:05,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:37:05,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:37:05,766 INFO L87 Difference]: Start difference. First operand 150288 states and 691334 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:37:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:37:07,652 INFO L93 Difference]: Finished difference Result 228605 states and 1039503 transitions. [2021-06-12 22:37:07,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:37:07,653 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:37:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:37:08,833 INFO L225 Difference]: With dead ends: 228605 [2021-06-12 22:37:08,834 INFO L226 Difference]: Without dead ends: 228605 [2021-06-12 22:37:08,834 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:37:09,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228605 states. [2021-06-12 22:37:12,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228605 to 150267. [2021-06-12 22:37:12,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150267 states, 150266 states have (on average 4.600089175195985) internal successors, (691237), 150266 states have internal predecessors, (691237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:37:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150267 states to 150267 states and 691237 transitions. [2021-06-12 22:37:14,223 INFO L78 Accepts]: Start accepts. Automaton has 150267 states and 691237 transitions. Word has length 25 [2021-06-12 22:37:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:37:14,223 INFO L482 AbstractCegarLoop]: Abstraction has 150267 states and 691237 transitions. [2021-06-12 22:37:14,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:37:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 150267 states and 691237 transitions. [2021-06-12 22:37:15,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:37:15,165 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:37:15,165 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:37:15,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:37:15,366 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:37:15,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:37:15,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1939792664, now seen corresponding path program 17 times [2021-06-12 22:37:15,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:37:15,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294799195] [2021-06-12 22:37:15,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:37:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:37:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:37:15,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:37:15,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294799195] [2021-06-12 22:37:15,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294799195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:37:15,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297021175] [2021-06-12 22:37:15,426 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:37:15,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:37:15,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:37:15,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:37:15,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:37:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:37:15,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297021175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:37:15,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:37:15,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:37:15,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423654458] [2021-06-12 22:37:15,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:37:15,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:37:15,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:37:15,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:37:15,603 INFO L87 Difference]: Start difference. First operand 150267 states and 691237 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:37:17,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:37:17,554 INFO L93 Difference]: Finished difference Result 181963 states and 827326 transitions. [2021-06-12 22:37:17,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:37:17,554 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:37:17,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:37:18,738 INFO L225 Difference]: With dead ends: 181963 [2021-06-12 22:37:18,738 INFO L226 Difference]: Without dead ends: 181963 [2021-06-12 22:37:18,738 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=205, Invalid=347, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:37:18,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181963 states. [2021-06-12 22:37:22,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181963 to 150263. [2021-06-12 22:37:22,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150263 states, 150262 states have (on average 4.600091839586855) internal successors, (691219), 150262 states have internal predecessors, (691219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:37:23,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150263 states to 150263 states and 691219 transitions. [2021-06-12 22:37:23,362 INFO L78 Accepts]: Start accepts. Automaton has 150263 states and 691219 transitions. Word has length 25 [2021-06-12 22:37:23,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:37:23,363 INFO L482 AbstractCegarLoop]: Abstraction has 150263 states and 691219 transitions. [2021-06-12 22:37:23,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:37:23,363 INFO L276 IsEmpty]: Start isEmpty. Operand 150263 states and 691219 transitions. [2021-06-12 22:37:24,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:37:24,026 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:37:24,026 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:37:24,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-12 22:37:24,241 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:37:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:37:24,241 INFO L82 PathProgramCache]: Analyzing trace with hash -186895918, now seen corresponding path program 18 times [2021-06-12 22:37:24,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:37:24,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656719827] [2021-06-12 22:37:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:37:24,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:37:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:37:24,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:37:24,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656719827] [2021-06-12 22:37:24,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656719827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:37:24,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134522139] [2021-06-12 22:37:24,281 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:37:24,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:37:24,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:37:24,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 22:37:24,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:37:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:37:24,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134522139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:37:24,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:37:24,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-06-12 22:37:24,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774411751] [2021-06-12 22:37:24,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:37:24,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:37:24,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:37:24,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:37:24,384 INFO L87 Difference]: Start difference. First operand 150263 states and 691219 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 22:37:25,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:37:25,967 INFO L93 Difference]: Finished difference Result 192198 states and 881415 transitions. [2021-06-12 22:37:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:37:25,967 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 22:37:25,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:37:26,940 INFO L225 Difference]: With dead ends: 192198 [2021-06-12 22:37:26,941 INFO L226 Difference]: Without dead ends: 192052 [2021-06-12 22:37:26,941 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:37:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192052 states. [2021-06-12 22:37:30,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192052 to 150747. [2021-06-12 22:37:30,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150747 states, 150746 states have (on average 4.600427208682154) internal successors, (693496), 150746 states have internal predecessors, (693496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:37:31,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150747 states to 150747 states and 693496 transitions. [2021-06-12 22:37:31,869 INFO L78 Accepts]: Start accepts. Automaton has 150747 states and 693496 transitions. Word has length 25 [2021-06-12 22:37:31,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:37:31,870 INFO L482 AbstractCegarLoop]: Abstraction has 150747 states and 693496 transitions. [2021-06-12 22:37:31,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 22:37:31,870 INFO L276 IsEmpty]: Start isEmpty. Operand 150747 states and 693496 transitions. [2021-06-12 22:37:32,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:37:32,337 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:37:32,337 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:37:32,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:37:32,553 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:37:32,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:37:32,553 INFO L82 PathProgramCache]: Analyzing trace with hash -567050456, now seen corresponding path program 19 times [2021-06-12 22:37:32,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:37:32,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044912607] [2021-06-12 22:37:32,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:37:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:37:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:37:32,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:37:32,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044912607] [2021-06-12 22:37:32,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044912607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:37:32,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026960890] [2021-06-12 22:37:32,647 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:37:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:37:32,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 22:37:32,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:37:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:37:32,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026960890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:37:32,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:37:32,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-06-12 22:37:32,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474149045] [2021-06-12 22:37:32,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:37:32,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:37:32,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:37:32,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:37:32,801 INFO L87 Difference]: Start difference. First operand 150747 states and 693496 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 22:37:33,171 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2021-06-12 22:37:34,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:37:34,594 INFO L93 Difference]: Finished difference Result 151664 states and 696652 transitions. [2021-06-12 22:37:34,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:37:34,595 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 25 [2021-06-12 22:37:34,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:37:35,550 INFO L225 Difference]: With dead ends: 151664 [2021-06-12 22:37:35,550 INFO L226 Difference]: Without dead ends: 151407 [2021-06-12 22:37:35,550 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 452.8ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:37:35,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151407 states. [2021-06-12 22:37:38,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151407 to 150715. [2021-06-12 22:37:39,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150715 states, 150714 states have (on average 4.600030521384874) internal successors, (693289), 150714 states have internal predecessors, (693289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:37:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150715 states to 150715 states and 693289 transitions. [2021-06-12 22:37:39,975 INFO L78 Accepts]: Start accepts. Automaton has 150715 states and 693289 transitions. Word has length 25 [2021-06-12 22:37:39,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:37:39,975 INFO L482 AbstractCegarLoop]: Abstraction has 150715 states and 693289 transitions. [2021-06-12 22:37:39,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 22:37:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand 150715 states and 693289 transitions. [2021-06-12 22:37:40,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:37:40,304 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:37:40,304 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:37:40,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-12 22:37:40,504 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:37:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:37:40,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1169845454, now seen corresponding path program 20 times [2021-06-12 22:37:40,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:37:40,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517294902] [2021-06-12 22:37:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:37:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:37:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:37:40,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:37:40,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517294902] [2021-06-12 22:37:40,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517294902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:37:40,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828361820] [2021-06-12 22:37:40,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:37:40,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:37:40,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:37:40,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 22:37:40,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:37:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:37:40,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828361820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:37:40,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:37:40,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-12 22:37:40,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758929434] [2021-06-12 22:37:40,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:37:40,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:37:40,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:37:40,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:37:40,676 INFO L87 Difference]: Start difference. First operand 150715 states and 693289 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 22:37:42,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:37:42,576 INFO L93 Difference]: Finished difference Result 193192 states and 885923 transitions. [2021-06-12 22:37:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:37:42,576 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 22:37:42,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:37:43,277 INFO L225 Difference]: With dead ends: 193192 [2021-06-12 22:37:43,277 INFO L226 Difference]: Without dead ends: 193064 [2021-06-12 22:37:43,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:37:43,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193064 states. [2021-06-12 22:37:47,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193064 to 150929. [2021-06-12 22:37:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150929 states, 150928 states have (on average 4.599756175129864) internal successors, (694232), 150928 states have internal predecessors, (694232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:37:48,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150929 states to 150929 states and 694232 transitions. [2021-06-12 22:37:48,206 INFO L78 Accepts]: Start accepts. Automaton has 150929 states and 694232 transitions. Word has length 25 [2021-06-12 22:37:48,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:37:48,206 INFO L482 AbstractCegarLoop]: Abstraction has 150929 states and 694232 transitions. [2021-06-12 22:37:48,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 22:37:48,207 INFO L276 IsEmpty]: Start isEmpty. Operand 150929 states and 694232 transitions. [2021-06-12 22:37:48,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:37:48,900 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:37:48,900 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:37:49,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 22:37:49,113 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:37:49,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:37:49,113 INFO L82 PathProgramCache]: Analyzing trace with hash 919442638, now seen corresponding path program 8 times [2021-06-12 22:37:49,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:37:49,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268413352] [2021-06-12 22:37:49,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:37:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:37:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:37:49,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:37:49,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268413352] [2021-06-12 22:37:49,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268413352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:37:49,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041011971] [2021-06-12 22:37:49,142 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:37:49,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:37:49,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:37:49,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:37:49,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:37:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:37:49,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041011971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:37:49,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:37:49,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 22:37:49,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108676939] [2021-06-12 22:37:49,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:37:49,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:37:49,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:37:49,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:37:49,242 INFO L87 Difference]: Start difference. First operand 150929 states and 694232 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:37:51,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:37:51,003 INFO L93 Difference]: Finished difference Result 156612 states and 717259 transitions. [2021-06-12 22:37:51,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:37:51,017 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:37:51,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:37:52,069 INFO L225 Difference]: With dead ends: 156612 [2021-06-12 22:37:52,069 INFO L226 Difference]: Without dead ends: 156525 [2021-06-12 22:37:52,069 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:37:52,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156525 states. [2021-06-12 22:37:55,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156525 to 152518. [2021-06-12 22:37:55,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152518 states, 152517 states have (on average 4.600287181101123) internal successors, (701622), 152517 states have internal predecessors, (701622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:37:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152518 states to 152518 states and 701622 transitions. [2021-06-12 22:37:56,855 INFO L78 Accepts]: Start accepts. Automaton has 152518 states and 701622 transitions. Word has length 25 [2021-06-12 22:37:56,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:37:56,856 INFO L482 AbstractCegarLoop]: Abstraction has 152518 states and 701622 transitions. [2021-06-12 22:37:56,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:37:56,856 INFO L276 IsEmpty]: Start isEmpty. Operand 152518 states and 701622 transitions. [2021-06-12 22:37:57,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:37:57,198 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:37:57,198 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:37:57,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:37:57,398 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:37:57,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:37:57,399 INFO L82 PathProgramCache]: Analyzing trace with hash 920853582, now seen corresponding path program 4 times [2021-06-12 22:37:57,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:37:57,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780908067] [2021-06-12 22:37:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:37:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:37:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:37:57,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:37:57,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780908067] [2021-06-12 22:37:57,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780908067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:37:57,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514151054] [2021-06-12 22:37:57,419 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:37:57,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:37:57,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:37:57,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:37:57,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:37:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:37:57,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514151054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:37:57,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:37:57,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 22:37:57,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561250590] [2021-06-12 22:37:57,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:37:57,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:37:57,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:37:57,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:37:57,493 INFO L87 Difference]: Start difference. First operand 152518 states and 701622 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:37:58,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:37:58,877 INFO L93 Difference]: Finished difference Result 156333 states and 716897 transitions. [2021-06-12 22:37:58,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:37:58,877 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:37:58,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:37:59,437 INFO L225 Difference]: With dead ends: 156333 [2021-06-12 22:37:59,437 INFO L226 Difference]: Without dead ends: 156315 [2021-06-12 22:37:59,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:37:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156315 states. [2021-06-12 22:38:02,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156315 to 152720. [2021-06-12 22:38:03,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152720 states, 152719 states have (on average 4.600062860547803) internal successors, (702517), 152719 states have internal predecessors, (702517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:38:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152720 states to 152720 states and 702517 transitions. [2021-06-12 22:38:04,005 INFO L78 Accepts]: Start accepts. Automaton has 152720 states and 702517 transitions. Word has length 25 [2021-06-12 22:38:04,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:38:04,005 INFO L482 AbstractCegarLoop]: Abstraction has 152720 states and 702517 transitions. [2021-06-12 22:38:04,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:38:04,005 INFO L276 IsEmpty]: Start isEmpty. Operand 152720 states and 702517 transitions. [2021-06-12 22:38:04,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:38:04,328 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:38:04,328 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:38:04,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-12 22:38:04,529 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:38:04,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:38:04,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1371587662, now seen corresponding path program 5 times [2021-06-12 22:38:04,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:38:04,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521950024] [2021-06-12 22:38:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:38:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:38:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:38:04,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:38:04,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521950024] [2021-06-12 22:38:04,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521950024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:38:04,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914923211] [2021-06-12 22:38:04,551 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:38:04,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:38:04,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:38:04,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:38:04,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:38:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:38:04,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914923211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:38:04,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:38:04,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 22:38:04,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373427836] [2021-06-12 22:38:04,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:38:04,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:38:04,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:38:04,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:38:04,635 INFO L87 Difference]: Start difference. First operand 152720 states and 702517 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 22:38:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:38:06,107 INFO L93 Difference]: Finished difference Result 161541 states and 737182 transitions. [2021-06-12 22:38:06,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:38:06,107 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 25 [2021-06-12 22:38:06,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:38:07,310 INFO L225 Difference]: With dead ends: 161541 [2021-06-12 22:38:07,310 INFO L226 Difference]: Without dead ends: 161541 [2021-06-12 22:38:07,310 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:38:07,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161541 states. [2021-06-12 22:38:11,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161541 to 152520. [2021-06-12 22:38:11,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152520 states, 152519 states have (on average 4.598823753106171) internal successors, (701408), 152519 states have internal predecessors, (701408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:38:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152520 states to 152520 states and 701408 transitions. [2021-06-12 22:38:12,527 INFO L78 Accepts]: Start accepts. Automaton has 152520 states and 701408 transitions. Word has length 25 [2021-06-12 22:38:12,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:38:12,527 INFO L482 AbstractCegarLoop]: Abstraction has 152520 states and 701408 transitions. [2021-06-12 22:38:12,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 22:38:12,527 INFO L276 IsEmpty]: Start isEmpty. Operand 152520 states and 701408 transitions. [2021-06-12 22:38:12,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:38:12,872 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:38:12,872 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:38:13,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:38:13,081 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:38:13,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:38:13,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1828705168, now seen corresponding path program 6 times [2021-06-12 22:38:13,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:38:13,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784160139] [2021-06-12 22:38:13,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:38:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:38:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:38:13,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:38:13,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784160139] [2021-06-12 22:38:13,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784160139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:38:13,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408413104] [2021-06-12 22:38:13,103 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:38:13,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 22:38:13,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:38:13,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:38:13,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:38:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:38:13,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408413104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:38:13,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:38:13,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 22:38:13,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8260764] [2021-06-12 22:38:13,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:38:13,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:38:13,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:38:13,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:38:13,166 INFO L87 Difference]: Start difference. First operand 152520 states and 701408 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 22:38:14,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:38:14,563 INFO L93 Difference]: Finished difference Result 156029 states and 715406 transitions. [2021-06-12 22:38:14,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:38:14,564 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 25 [2021-06-12 22:38:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:38:15,106 INFO L225 Difference]: With dead ends: 156029 [2021-06-12 22:38:15,107 INFO L226 Difference]: Without dead ends: 156011 [2021-06-12 22:38:15,107 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:38:15,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156011 states. [2021-06-12 22:38:18,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156011 to 152534. [2021-06-12 22:38:18,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152534 states, 152533 states have (on average 4.598604892056145) internal successors, (701439), 152533 states have internal predecessors, (701439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:38:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152534 states to 152534 states and 701439 transitions. [2021-06-12 22:38:19,702 INFO L78 Accepts]: Start accepts. Automaton has 152534 states and 701439 transitions. Word has length 25 [2021-06-12 22:38:19,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:38:19,702 INFO L482 AbstractCegarLoop]: Abstraction has 152534 states and 701439 transitions. [2021-06-12 22:38:19,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 22:38:19,702 INFO L276 IsEmpty]: Start isEmpty. Operand 152534 states and 701439 transitions. [2021-06-12 22:38:20,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:38:20,036 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:38:20,036 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:38:20,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-12 22:38:20,249 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:38:20,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:38:20,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1290086910, now seen corresponding path program 7 times [2021-06-12 22:38:20,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:38:20,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355656334] [2021-06-12 22:38:20,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:38:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:38:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:38:20,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:38:20,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355656334] [2021-06-12 22:38:20,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355656334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:38:20,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412239210] [2021-06-12 22:38:20,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:38:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:38:20,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:38:20,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:38:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:38:20,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412239210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:38:20,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:38:20,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 22:38:20,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60264186] [2021-06-12 22:38:20,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:38:20,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:38:20,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:38:20,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:38:20,363 INFO L87 Difference]: Start difference. First operand 152534 states and 701439 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 22:38:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:38:21,903 INFO L93 Difference]: Finished difference Result 187205 states and 846532 transitions. [2021-06-12 22:38:21,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:38:21,903 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 25 [2021-06-12 22:38:21,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:38:22,905 INFO L225 Difference]: With dead ends: 187205 [2021-06-12 22:38:22,905 INFO L226 Difference]: Without dead ends: 187205 [2021-06-12 22:38:22,905 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:38:23,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187205 states. [2021-06-12 22:38:26,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187205 to 152752. [2021-06-12 22:38:26,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152752 states, 152751 states have (on average 4.597796413771432) internal successors, (702318), 152751 states have internal predecessors, (702318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:38:27,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152752 states to 152752 states and 702318 transitions. [2021-06-12 22:38:27,829 INFO L78 Accepts]: Start accepts. Automaton has 152752 states and 702318 transitions. Word has length 25 [2021-06-12 22:38:27,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:38:27,829 INFO L482 AbstractCegarLoop]: Abstraction has 152752 states and 702318 transitions. [2021-06-12 22:38:27,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 22:38:27,829 INFO L276 IsEmpty]: Start isEmpty. Operand 152752 states and 702318 transitions. [2021-06-12 22:38:28,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:38:28,612 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:38:28,612 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:38:28,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:38:28,825 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:38:28,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:38:28,825 INFO L82 PathProgramCache]: Analyzing trace with hash 2119082106, now seen corresponding path program 8 times [2021-06-12 22:38:28,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:38:28,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561080778] [2021-06-12 22:38:28,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:38:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:38:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:38:28,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:38:28,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561080778] [2021-06-12 22:38:28,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561080778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:38:28,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095611907] [2021-06-12 22:38:28,925 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:38:29,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:38:29,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:38:29,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 22:38:29,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:38:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:38:29,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095611907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:38:29,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:38:29,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 22:38:29,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360773614] [2021-06-12 22:38:29,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:38:29,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:38:29,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:38:29,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:38:29,089 INFO L87 Difference]: Start difference. First operand 152752 states and 702318 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 22:38:31,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:38:31,003 INFO L93 Difference]: Finished difference Result 153348 states and 704507 transitions. [2021-06-12 22:38:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 22:38:31,004 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 25 [2021-06-12 22:38:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:38:31,554 INFO L225 Difference]: With dead ends: 153348 [2021-06-12 22:38:31,554 INFO L226 Difference]: Without dead ends: 153248 [2021-06-12 22:38:31,554 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:38:31,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153248 states. [2021-06-12 22:38:34,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153248 to 152808. [2021-06-12 22:38:34,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152808 states, 152807 states have (on average 4.597446452060442) internal successors, (702522), 152807 states have internal predecessors, (702522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:38:35,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152808 states to 152808 states and 702522 transitions. [2021-06-12 22:38:35,969 INFO L78 Accepts]: Start accepts. Automaton has 152808 states and 702522 transitions. Word has length 25 [2021-06-12 22:38:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:38:35,969 INFO L482 AbstractCegarLoop]: Abstraction has 152808 states and 702522 transitions. [2021-06-12 22:38:35,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 22:38:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 152808 states and 702522 transitions. [2021-06-12 22:38:36,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:38:36,662 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:38:36,662 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:38:36,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:38:36,863 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:38:36,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:38:36,863 INFO L82 PathProgramCache]: Analyzing trace with hash -656052858, now seen corresponding path program 9 times [2021-06-12 22:38:36,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:38:36,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67484212] [2021-06-12 22:38:36,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:38:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:38:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:38:36,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:38:36,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67484212] [2021-06-12 22:38:36,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67484212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:38:36,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530101726] [2021-06-12 22:38:36,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:38:36,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:38:36,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:38:36,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:38:36,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:38:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:38:36,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530101726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:38:36,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:38:36,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:38:36,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513925584] [2021-06-12 22:38:36,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:38:36,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:38:36,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:38:36,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:38:36,980 INFO L87 Difference]: Start difference. First operand 152808 states and 702522 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:38:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:38:39,264 INFO L93 Difference]: Finished difference Result 254992 states and 1153363 transitions. [2021-06-12 22:38:39,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:38:39,265 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-12 22:38:39,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:38:40,617 INFO L225 Difference]: With dead ends: 254992 [2021-06-12 22:38:40,617 INFO L226 Difference]: Without dead ends: 254992 [2021-06-12 22:38:40,617 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:38:40,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254992 states. [2021-06-12 22:38:45,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254992 to 167585. [2021-06-12 22:38:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167585 states, 167584 states have (on average 4.616341655527974) internal successors, (773625), 167584 states have internal predecessors, (773625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:38:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167585 states to 167585 states and 773625 transitions. [2021-06-12 22:38:47,153 INFO L78 Accepts]: Start accepts. Automaton has 167585 states and 773625 transitions. Word has length 25 [2021-06-12 22:38:47,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:38:47,153 INFO L482 AbstractCegarLoop]: Abstraction has 167585 states and 773625 transitions. [2021-06-12 22:38:47,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:38:47,153 INFO L276 IsEmpty]: Start isEmpty. Operand 167585 states and 773625 transitions. [2021-06-12 22:38:48,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-12 22:38:48,011 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:38:48,011 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:38:48,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:38:48,227 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:38:48,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:38:48,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1715216728, now seen corresponding path program 10 times [2021-06-12 22:38:48,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:38:48,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123776801] [2021-06-12 22:38:48,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:38:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:38:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:38:48,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:38:48,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123776801] [2021-06-12 22:38:48,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123776801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:38:48,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821377517] [2021-06-12 22:38:48,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:38:48,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:38:48,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:38:48,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 22:38:48,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:38:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:38:48,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821377517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:38:48,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:38:48,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 22:38:48,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383640173] [2021-06-12 22:38:48,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:38:48,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:38:48,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:38:48,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:38:48,380 INFO L87 Difference]: Start difference. First operand 167585 states and 773625 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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)